Arrangements related to operating an autonomous vehicle in view-obstructed environments are described. At least a portion of an external environment of the autonomous vehicle can be sensed to detect one or more objects located therein. An occupant viewable area of the external environment can be determined. It can be determined whether one or more of the detected one or more objects is located outside of the determined occupant viewable area. Responsive to determining that a detected object is located outside of the determined occupant viewable area, one or more actions can be taken. For instance, the action can include presenting an alert within the autonomous vehicle. Alternatively or in addition, the action can include causing a current driving action of the autonomous vehicle to be modified.

An autonomous vehicle can encounter an external environment in which an object overhangs a current road of the autonomous vehicle. For example, the branch of a tree may overhang the road. Such an overhanging object can be detected and suitable driving maneuvers for the autonomous vehicle can be determined. Sensor data can be acquired from at least a forward portion of the external environment. One or more floating obstacle candidates can be identified based on the acquired sensor data. The identified one or more floating obstacle candidates can be filtered to remove any floating obstacle candidates that do not meet one or more predefined parameters. A driving maneuver for the autonomous vehicle can be determined at least partially based on a height clearance between the autonomous vehicle and floating obstacle candidates that remain after being filtered out. The autonomous vehicle can be caused to implement the determined driving maneuver.

In one embodiment information regarding device activity of first subscriber to a transportation service is received. A backend server determines independent of a pending transportation request from the first passenger and based at least on the information regarding the device activity of the first subscriber, to send a driver towards a location based on the location of the first subscriber.

A car wash with integrated diagnostic functions is provided that includes the ability to wash and dry a connected vehicle and perform various diagnostic functions. The various diagnostic functions such as tread depth measurement, measuring tire pressures, performing safety inspection, emissions testing and performing vehicle diagnostics and the like may be performed while the connected vehicle is at the car wash. The results of the diagnostic tests may be provided to the driver at the end of the car wash via the driver's wireless computing device.

A system and method for monitoring operation of vehicle automation systems utilizes an electronic vehicle monitor configured to connect to a computer system of a vehicle via the on board diagnostics (“OBD”) port of the vehicle. The electronic vehicle monitor is configured to obtain operational status information of the activation or use of vehicle automation systems of the vehicle, such as of an automated braking system, automated acceleration system, automated steering system, automated vehicle navigation system, automated collision avoidance system, and an automated cruise control system. The electronic vehicle monitor transmits the obtained operational status information to a computing device, such as a mobile computer of a passenger or the vehicle driver, or to a remotely located computer. The electronic vehicle monitor may include a wireless transmitter, and may include a global positioning system module or be configured to obtain location information from a global positioning system of the vehicle

A method of health management of a monitored system includes collecting component condition indicator data used to calculate a plurality of component health indicators. Component fault severity and potential failure modes are determined utilizing the component condition indicator data. The potential failure modes are ranked in order of likelihood to isolate the failure mode. A system of health management for monitored apparatus includes a fault severity module to derive a plurality of component health indicators from collected component condition indicator data, the plurality of component health indicators indicative of fault severity of a plurality of components. A fault isolation module separately derives a ranked listing of potential fault/failure modes utilizing the component condition indicator data. The system further includes a communication portion to which the plurality of component health indicators and the ranked listing of fault/failure modes are transmitted for review and/or action by cognizant personnel.

Aspects of the present disclosure include a navigation system and computer-implemented methods for detecting traffic disruption events based on an analysis of input component data obtained from navigation-enabled devices of vehicles near a particular location. Traffic disruption events are events such as accidents, construction road closures, police and speed traps, or road hazards that cause a decrease in the flow of traffic along a particular route and thus, added time delays for occupants of vehicles traveling along those routes. The navigation system scores the input component data associated with each vehicle and aggregates the scored input component data to obtain a frustration score associated with the vehicle. The navigation system may detect traffic disruption events based on a number of vehicles near a particular area having associated frustration scores above a certain threshold.

A collision risk calculation device includes: a movement information obtaining unit that obtains a speed and a movement direction of an obstacle; and a risk map generator that generates a risk map indicating a range within which the obstacle can exist after one unit of time and degree of risk of collision of an own vehicle with the obstacle within the range, on a basis of the speed and the movement direction of the obstacle obtained by the movement information obtaining unit, wherein the risk map generator changes the range in left and right directions with respect to a traveling direction of the obstacle, on a basis of the speed of the obstacle in the traveling direction.

Described herein is an onboard vehicle system configured to capture vehicle information and notify an operator of the onboard vehicle system of potentially dangerous vehicles. In some embodiments, the onboard vehicle system may capture image information related to its surroundings. The image information may be processed to identify one or more vehicle identifiers associated with vehicles in the vicinity of the onboard system. The onboard system may provide vehicle identifiers to a service provider computer, which may subsequently query one or more driver behavior databases for anomalous behavior related to the vehicle identifiers. Upon detecting anomalous behavior for a target vehicle, the service provider computer may generate one or more notifications to be presented to the operator of the onboard system with regard to the target vehicle. In some embodiments, the onboard system may present the notification to the operator in an audio and/or visual format.

Described herein is a vehicle system configured to identify and mitigate inappropriate driving behavior. In some embodiments, the vehicle system may receive input information from one or more input sensors. The vehicle system may identify driving behaviors related to a vehicle from the received input. The vehicle system may determine whether the driving behaviors are inappropriate in light of one or more conditions affecting the vehicle. Upon identifying inappropriate behavior, the vehicle system may generate a set of corrective actions capable of being executed to mitigate the inappropriate driving behavior.

A method for finding an evasive trajectory for avoiding an obstacle for a vehicle on a roadway. A component of a candidate trajectory parallel to the roadway is determined by selecting weighting coefficients of a first weighted sum of orthogonal functions of time. A component of the candidate trajectory orthogonal to the roadway is determined by selecting weighting coefficients of a second weighted sum of the orthogonal functions. An optimization parameter for the candidate trajectory is calculated. At least one coefficient of at least one of the sums is modified and the procedure is repeated when the optimization parameter does not reach a termination criterion.

A system that provides a safety rating for a driver or a vehicle to a rider of the vehicle. Information including diagnostic information such as sensor information and location information is used to determine the safety rating. By having a high safety rating, the rider of the vehicle has some level of assurance that the vehicle will arrive at a designated location.

The present application provides a system and method for enabling a driver to locate a passenger. In one or more implementations, a graphical user interface is provided that is operable to send and receive information associated with passengers and vehicles. A location of a first vehicle, a location of a first passenger and a location of a second passenger are received. Information associated with the locations of the first and second passenger is transmitted and a representation of at least one of the first passenger and the second passenger and the respective location thereof is provided.

A system and method are provided for communication between vehicles within a platoon of vehicles. In one embodiment, each vehicle is equipped with forward and backward directed optical emitters and receivers in operable communication with a controller. In an initialization phase, each vehicle determines its position within the platoon and the identification of all vehicles of the platoon. In a data transmission phase, each vehicle takes part in a token-based data transmission.

The present invention provides a flight control method for an aerial vehicle and a related device. The method may comprises receiving flight indication data under a current environment, the flight indication data including flight indication data detected by another aerial vehicle or provided by an external storage device; generating a flight control instruction according to the received flight indication data to control a flight of the aerial vehicle. An embodiment of the present invention may store and manage the flight indication data acquired by various aerial vehicles, so as to provide the support of related flight indication data to some requesting aerial vehicles, to enable the requesting aerial vehicles to perform operations such as obstacle avoidance, safe path planning and finding landing places based on the flight indication data.

A positive electrode active material includes: secondary particles obtained by aggregation of a plurality of primary particles. The primary particles include, core particles including a lithium composite oxide, and a layer that is provided on surfaces of the core particles and includes a lithium composite oxide. The lithium composite oxide included in the core particles and the lithium composite oxide included in the layer have the same composition or almost the same composition, and crystallinity of the lithium composite oxide included in the layer is lower than crystallinity of the lithium composite oxide included in the core particles.

The present invention provides a manually powered drive assembly for a vehicle. A foot crank winds a helical torsion spring through a system of shafts and sprockets in a first direction. By releasing a brake applied to a wheel, or wheels, of the vehicle, the wound spring transfers a rotational movement from a spring shaft to a freewheel sprocket coaxially aligned with the axle supporting a wheel, so that the rotational movement upon the wheel assists a user in manually moving the vehicle. The drive assembly may be advantageously used with a wheelbarrow to assist in building up momentum for moving heavy loads.

A vehicle passive entry side door latch release system engageable with a release cable connected a door latch includes a moveable linkage assembly engageable with the cable, and a motor including an output shaft engaged with a tensioning gear for driving a ratcheting gearwheel rotatably affixed to a coil spring, with the gearwheel including external teeth engageable with a rack affixed to the linkage to move the cable to unlatch the door latch. A pivotable ratcheting pawl may be engageable with the gearwheel to allow or prevent rotation of the gearwheel. Operation of the motor may drive the gear to drive the gearwheel in a rotary direction to energize the spring, and disengagement of the pawl from the gearwheel may allow stored energy in the spring to drive the gearwheel in an opposite rotary direction to thereby drive the rack to move the cable to unlatch the door latch.

This application includes a number of embodiments of a spring powered toothbrush for cleaning teeth. A wind-up spring is located in the base of the toothbrush which spring provides power for a gear train including a drive shaft assembly that is designed to bring about rapid movement of the brush portion of the toothbrush to aid in cleaning the teeth. The drive mechanism is controlled by a spring biased push button in the toothbrush housing. In one version the brush portion of the toothbrush includes a rotatable brush section that is gear driven by the drive shaft. In another version the upper portion of the toothbrush is vibrated by an offset weight connected to the drive shaft and in a third version the drive shaft includes an offset weight that acts to oscillate a movable brush section by intermittent engagement between the; weight and brush section.

A driving apparatus for driving a functional body mounted on a vehicle comprises a power supply, an electric motor, and a driving means. The electric motor is connected to the power supply and is started by a power feed from the power supply. The driving means has a spring motor and is connected to the electric motor and the functional body. The driving means accumulates an urging force by winding up the spring motor by the electric motor and driving the functional body by the urging force. This driving apparatus can automatically drive the functional body, can be manufactured inexpensively, and accumulates a driving force to the functional body without giving burdens to an occupant.

A pumping unit system having vertical sampson post, a walking beam pivotally supported at the upper end of the sampson post and a horsehead affixed at a forward end thereof that supports a reciprocated sucker rod string, including a gear reducer mounted at selectable positions on the walking beam and having a horizontally extending drive shaft, a crank arm affixed to the drive shaft the spacing between a selectable length pitman rod having a first end secured to said crank arm and a second end having a pitman bearing that is selectably mountable to a plurality of pitman bearing locations and a prime mover connected to the gear reducer and wherein the characteristics of the pumping unit are determined by the selectable position of the gear reducer, the selectable length of the crank arm, the selectable length of the pitman rod, and the selectable pitman bearing location.

Luggage or carrying container (1) having an interface (10) for cooperating with one or more electronic and/or wireless devices (20, 22, 24, 26, 28), a rechargeable power source (30), an integrated antenna (40), and a wireless communication system (50). The luggage (1) allows a user to better manage various electronic devices/accessories in terms of space, efficiency and operation during travel.

An actuator and door latch system incorporating the same. The actuator moves a door latch between locked and unlocked positions with rapidity using a gear train directly coupled to an actuator motor or energy stored in an energy storage element such as a spring.

A mechanical rotational drive has a bar-like torsion element, whereby the torsion element is firmly clamped with a first end in a bearing device. The torsion element can be pivoted with a second free end with respect to the clamped end about the longitudinal axis, forming a rotation axis, of the torsion element between a relaxed position and a tensioned position, whereby the length of the torsion element is reduced with respect to the relaxed position when the torsion element is brought into its tensioned position. A device for transmitting a torque into the torsion element or out of the torsion element is provided in the area of the free end, and a damping device is arranged in the axial direction of the torsion element at a fixed distance from the bearing device and adjacent to the free end of the torsion element, and a damping part is provided on the torsion element in the area of the free end of the torsion element, which damping part in the relaxed position is in friction engagement with the damping device and which in the tensioned position is not engaged with the damping device.

A spring-based mechanism for saving labor of a bicycle rider is disclosed and in one embodiment includes an axle operatively connected to a chain wheel and a first set of bearings via a gear assembly; a housing for mounting a shaft therein wherein the first set of bearings is provided at one end of the shaft; a second set of bearings provided at the other end of the shaft; a spring in the housing and having one end attached to one end of the shaft and the other end attached to the other end of the housing; and a clutch provided externally of the other end of the housing, the clutch being operatively connected to the second set of bearings and including a lock lever. The mechanism can store elastic force by counterclockwise pedaling and release the stored energy by disengaging a clutch from the mechanism when riding uphill.

A rigid arm pendulum is combined with a helical device attached to the pendulum horizontal axle to provide a double reciprocating action. While the pendulum reciprocates in rotary fashion about the axle, describing successive arcs of less than 360 degrees, the axle simultaneously produces a reciprocating action about its longitudinal centerline. A pumping action is thereby developed in line with the longitudinal centerline of the axle. This pumping (linear reciprocating) action can be utilized for a variety of requirements, including a hydraulic pump and a system to drive an electric generator.

A motor mounted on a structural support with a pivot at its center line which comprises a cylindrical vessel for holding a fluid in a closed system and in which a buoyant cylinder containing a lighter fluid is allowed to free float so that a cable attached to either end of the buoyant cylinder may be used to transfer energy to a energy storage unit, a crank or a generator. Two moment arms having a weight attached at the exterior end and inside attachably connected to the surface of two drive pistons that operate in pressure tanks which force a compressed gas against the pistons through pre-sequenced automatic activated valves to extend or retract the moment arms at the end of a cycle. The motor then becomes top heavy and rotates 180 degrees by gravity and relocks in place to repeat the cycle.

A gravity actuated torque generator for generating torque to run a generator by continually adding weights to the apparatus. The gravity actuated torque generator includes a support assembly, a drive assembly being supported by the support assembly, and a weight assembly being engagable to the drive assembly while moving downwardly due to gravitational forces for generating torque.

A control device for blinds includes a transmission unit, a scrolling unit and a tilting unit, the transmission unit includes a case in which a coil spring and a gear unit are received. The coil spring is connected between the gear unit and the case. The scrolling unit includes two scrolling rods which are rotated with a transmission rod. Each scrolling rod has a lift cord wrapped thereon and extending through slats of the blinds. The tilting unit includes two tilt members connected to two respective end sections of the two scrolling rods. Two tilt cords have two respective positioning members which are clamped in two clamp grooves of the two tilt members and the tilt cords extend through the slats. The gears in the gear unit can be adjusted so as to cooperate with slats of different weights.

A vehicle passive entry side door latch release system engageable with a release cable connected a door latch includes a moveable linkage assembly engageable with the cable, and a motor including an output shaft engaged with a tensioning gear for driving a ratcheting gearwheel rotatably affixed to a coil spring, with the gearwheel including external teeth engageable with a rack affixed to the linkage to move the cable to unlatch the door latch. A pivotable ratcheting pawl may be engageable with the gearwheel to allow or prevent rotation of the gearwheel. Operation of the motor may drive the gear to drive the gearwheel in a rotary direction to energize the spring, and disengagement of the pawl from the gearwheel may allow stored energy in the spring to drive the gearwheel in an opposite rotary direction to thereby drive the rack to move the cable to unlatch the door latch.

A fluid dispensing system provides a sprayer. The system has a container with liquid fluid, such as used in lawn and garden weed control and fertilization. The sprayer has a handle containing a spring engine and a pump for liquid from the container. The spring engine has a flat spring having a spring band extending from two coils wound on two shafts. One of the coils is manually wound by a crank connected to a shaft on which the coil is connected. The other shaft is connected to the pump by a rotary cam driver. Liquid is sucked by the pump into a pump chamber during part of a cycle of rotation of the other shaft when the coils are unwound and the liquid is pumped out of the chamber during the other part of the cycle of rotation to a sprayer head on the sprayer handle.

The invention provides an operational mechanism for a movable body in which, after a movable body is in an opened state, the movable body can return to a closed position, including a movable body rotatably attached to a support and rotatable between an engaged position, a closed position, and an open position; a rotating member rotatably attached to the support, that rotates due to movement of the movable body to the engaged position; a biasing member, one end of which is attached to the movable body, and the other end of which is attached to the rotating member; and an operation member, which rotates the rotating member, changes the biasing position of the biasing member with respect to the center of rotation of the movable body, and generates in the biasing member a rotational force that moves the movable body to the closed position or the open position.

There is provided a power source device capable of obtaining power not only when springs or the like return but also when a handle for winding up the springs or the like are operated. The power source device comprises a main shaft connected to both the handle and a main power generation device, an auxiliary shaft connected to an auxiliary power generation device arranged side by side in parallel with the main shaft, the main spring and the auxiliary spring requiring less load to wind up than the main spring being installed between the main shaft and the auxiliary shaft via drums such that accumulation and release of elastic force of the springs are alternated on both shafts, wherein when the main shaft is normally rotated by the handle, elastic force accumulated in the auxiliary spring is applied in the direction of rotation of the main shaft as releasing force.

An actuator assembly having a housing, at least one rotating gear member including a cam, and an actuator device operably connected to the rotating gear member, operably contained in the housing, for rotating the gear member. Also included is a bearing member operably associated with the cam such that when the actuator device is actuated for rotation of the gear member, the bearing member moves on the cam for providing relative motion between the bearing member and the rotating gear member. The actuator device is selected from a torque generating device or a device having linear movement.

A linear recliner assembly in use with a seat having a seat back pivotally engaged relative to a seat bottom. A housing exhibits a communicating interior between a first and second ends. A drive rod is supported in linearly displaceable fashion from the first end and is secured to the seat bottom. The second end pivotally engages the seatback spaced from its pivot point. A rotatable gear located at a fixed lineal position within the housing receives the drive rod in threadably inter-engaged fashion. A trigger mechanism pivotally secured to the housing exhibits a downwardly biased detent communicating through an opening in the housing to seat between succeeding teeth of the gear. A spring supported within the housing contacts the drive rod. Upon release of the detent, a reclining force applied to the seatback results in displacement of the housing against the drive rod to bias the spring. The spring influencing the drive rod in a reverse direction such that, upon release of said detent when the seatback is in the reclined position, the spring influences the seatback to reverse pivot to a returned upright position.

A drive mechanism for a device with two operating parts, which are connected so as to be pivotally displaceable relative to each other between a first position and a second position about a common axis of rotation. The drive mechanism has a driving mechanism such that a movement from the first position to the second position can be initiated initially by a slight movement and the additional movement is then effected automatically through spring force (F) until the second position has been reached. The movement out of the first position into the second position is possible in either a clockwise and counterclockwise movement. The driving mechanism comprises a driven part, one operating part and two drives that are in the form of a force storing device The force storing devices interact with the driven part in opposing directions in such a manner that only the one for storing device is in driving connection with the driven part while the other force storing device is retained in its starting position.

In an electricity generating device by applying vehicle weight, a rolling vehicle wheel is weighting down on a pressure receiver to actuate a driving mechanism having a restoring function. It is then able to provide a unidirectional rotating torque to drive a generating device to produce electrical power. The mechanical power transmission is performed by a transmission gear unit composed of a driving wheel and a follower wheel interconnected each other with a transmission means therebetween. When the vehicle weight is applied to the driving mechanism by pressing the vehicle wheel on the pressure receiver, the driving mechanism is forced to downwardly urge a ratchet wheel and a driving wheel to rotate that in turn causes the rotation of the follower wheel through the transmission means thereby driving the generating device to operate to produce electricity. The driving mechanism can recover its initial state with the aid of a balancing weight as soon as it has been liberate from the exerted pressure of the vehicle wheel. The device is to be installed flush with the road surface to work.

A device for generating rotational movement which includes an output shaft supported for rotational movement and at least two one-way clutch mechanisms attached to the output shaft. An inflatable piston (“infton”) assembly is associated with each one-way clutch mechanism and includes a weighted member, an inflatable bladder associated with the weighted member, at least one inlet valve associated with an interior of the inflatable bladder, at least one outlet valve associated with the interior of the inflatable bladder, and a chain associated with the weighted member and extending over and drivingly engaging the respective one-way clutch mechanism. A source of filling fluid supplies each inlet valve. The filling fluid has a density less than that of a buoyancy fluid surrounding the infton assembly. A control system is configured to control the inlet and outlet valves to facilitate filling and discharging of the inflatable bladders.

In accordance with embodiments, there are provided systems and method for In accordance with embodiments, there are provided systems and method for generating mechanical movement that includes a resilient member having an original shape. A bulwark is connected to the resilient member. A system is provided to selectively apply a torsional force to the resilient member using capillary forces to rotate the resilient member with respect to the bulwark. This places the resilient member in a deformed shape. The system also selectively terminates the capillary forces allowing the resilient member to return to the original shape. These and other embodiments are described more fully below.

A spring motor and drag brake for use in coverings for architectural openings.

A method for ascertaining a rotational speed parameter for determining a setpoint torque for driving a drivetrain. The drivetrain comprises a first and at least one second drive assembly for driving a hybrid vehicle. The first drive assembly can be coupled to the drivetrain by means of a clutch. The second drive assembly is mechanically coupled to the drivetrain. When the hybrid vehicle is being driven by means of at least the first drive assembly, the rotational speed parameter corresponds to the value of a shaft rotational speed. When the hybrid vehicle is being driven only by means of the second drive assembly, the rotational speed parameter corresponds to the value of a determined rotational speed.

A linear recliner assembly in use with a seat having a seat back pivotally engaged relative to a seat bottom. A housing exhibits a communicating interior between a first and second ends. A drive rod is supported in linearly displaceable fashion from the first end and is secured to the seat bottom. The second end pivotally engages the seatback spaced from its pivot point. A rotatable gear located at a fixed lineal position within the housing receives the drive rod in threadably inter-engaged fashion. A trigger mechanism pivotally secured to the housing exhibits a downwardly biased detent communicating through an opening in the housing to seat between succeeding teeth of the gear. A spring supported within the housing contacts the drive rod. Upon release of the detent, a reclining force applied to the seatback results in displacement of the housing against the drive rod to bias the spring. The spring influencing the drive rod in a reverse direction such that, upon release of said detent when the seatback is in the reclined position, the spring influences the seatback to reverse pivot to a returned upright position.

A method for operating a window cover utilizes an extendible window cover having a first rail, a second rail and a pair of lift cords. The first and second rails of the window cover are movable relative to each other. According to the method, at least one of the first rail and the second rail is moved in a first direction to cause the lift cords to unwind from the lift cord pulleys, thereby rotating a lift cord pulley shaft and a set of gears. Further, at least one of the first rail and the second rail is moved in a second direction to cause the lift cords to wind on the lift cord pulleys, with the lift cord pulley shaft rotating in an opposite direction.

An energy storing device is disclosed. In the energy storing device of the present invention, energy from an energy generating unit is stored in the form of spring torsion and then is output steadily. The energy storing device of the present invention includes a plurality of cog-wheels, a plurality of torsion magnitude limiting units, a plurality of single-directional input bearings, a plurality of energy storing units and a plurality of speed enhancing cog-wheels. Each of the energy storing units includes at least two end rotational disc portions, which are connected with each other co-axially. A leaf spring unit is provided between each pair of rotational disc portions and one end of the leaf spring unit is bent in an opposite direction. In addition, the energy storing units may be connected in series or in parallel to increase the efficiencies in energy storage and energy output.

A window cover system includes an extendible window cover with a pair of lift cords. A lift cord pulley shaft is coupled to a pair of spaced apart lift cord pulleys. A spring drive unit has a beveled gear system with a first gear that is spring biased to resist rotation of first gear in one direction of rotation, and a second gear meshed with the first gear. The lift cord pulley shaft extends through the second gear and is configured to rotate therewith.

A barrel including a box for receiving a pivot arbour and at least one spring, wherein the at least one spiral spring is mounted between an internal wall of the box and an external wall of the pivot arbour , and can be wound to supply mechanical energy. The barrel further includes a device for increasing torque of the at least one spring including supplementary energy accumulation curves made on the spring so that the barrel torque is customized according to a winding tension of the at least one spring. The barrel can be a timepiece barrel.

Gravity powered electrical energy generators, particularly for producing lighting is disclosed. The apparatus has a support frame (1, 30) in which a series of gears and a gear-driven generator (20) are mounted. The power to drive the most upstream gear (2) is provided by a weight suspended from a point to one side of the axis of rotation of gear (2). The drive gear of the furthest downstream gear has no teeth so that the final contact between the drive gear and the shaft of the generator (20) is frictional. The gear ratio of the final downstream gear is at least 25. When used for lighting, the apparatus may include one or more high brightness LEDs (40) mounted on the housing (30). By suitable choice of gear ratios, the device may produce thirty minutes of illumination while allowing a 10 kilogram weight to fall through a distance of 1.8 meters.

A printing device includes: a main body having an attachment surface; first and second mounting sections formed in the attachment surface respectively for detachably receiving first and second cassettes; first and second print parts; a body cover having an opposing surface; first and second pressing parts protruding from the opposing surface respectively toward the first and second mounting sections; first and second engaging parts provided at the main body; and third and fourth engaging parts provided at the body cover and engageable with the first and second engaging parts. A first center of gravity of load that the mounted first cassette applies to the first pressing part and a second center of gravity of load that the mounted second cassette applies to the second pressing part are located within a specific area on the opposing surface defined by virtual lines passing through locations on the third and fourth engaging parts.

A controller in a one-side printing mode moves movable rollers to form a one-side printing route and moves a second head unit so that the second head unit faces a front side of a web. The controller then controls a first head unit and a second head unit to print images of respective pages on the front side of the web while transferring the web at a transfer speed twice as fast as that in a both-side printing mode.

A method for controlling a print device by generating a firing encoder signal from varying one or more characteristics of a reference signal where, the one or more characteristics are varied based on at least the position of a print medium at a reference time. The firing encoder signal is used to synchronize firing of at least one print head of the print device after the reference time.