摘要:
A system for smoothly driving a stepping motor with constant currents. For that purpose, a voltage level setting circuit forms various combinations of voltage levels for a first phase and voltage levels for a second phase. Drive currents of the stepping motor are determined using the various combinations for a plurality of times during one step drive of the stepping motor.
摘要:
The present invention provides a sheet supplying apparatus comprising a sheet stacking means for stacking a plurality of sheets, a sheet supply means for feeding out the sheets stacked on the sheet stacking means, a separation means for separating the sheets one by one by abutting the sheets against the separation means to cause elastic angular change in the sheet thereby to ride the sheet over the separation means, and a guide means having a guide surface for guiding the sheet separated by the separation means toward a downstream side, and wherein the sheet stacking means is provided at its downstream end with a projection which protrudes toward downstream sides of the separation means and of the guide surface of the guide means.
摘要:
A replaceable ink cartridge can be inserted into and removed from a bubble jet printer receptacle for removably mounting the cartridge. The cartridge when mounted will cooperate with a hollow needle for supplying liquid ink to a print head and a pipe for removing waste ink from the head. The cartridge includes a container, a liquid ink reservoir and an absorber for waste liquid ink in the container, an outlet and an opening on the front wall of the container, and a label secured to the top wall of the container. The label contains a surface wiring resistance pattern including contact portions which are spaced apart and have an electric connection between them. When the container is mounted in the receptacle, the needle enters the outlet to connect the ink reservoir to the head, and the absorber enters a waste ink pipe opening. The contact portions then make sliding contact with spaced-apart electric terminals in the printer, connecting the terminals and thereby activating a control circuit in the printer.
摘要:
An ink cartridge, removably mountable on a fixed mounting portion of an ink jet recording apparatus for supplying discharged ink to a recording head carried on a movable carriage of the apparatus, comprises a flag member mounted for protrusion and retraction, an arrangement for protruding the flag member toward a path along which the carriage is moved when the ink cartridge is mounted on the mounting portion, and a photosensor mounted on the carriage in a position where it will be shielded from light by the protruding flag member.
摘要:
In a serial recording apparatus having three recording modes, i.e., normal, high-quality, and high-speed recording mode, sheet feed control satisfying requirements in these modes is performed. More specifically, high-speed sheet feed control is performed in the normal or high-speed recording mode, and low-noise sheet feed control with improved precision is performed in the high-quality recording mode although the speed is low.
摘要:
A sheet supplying apparatus comprises sheet supporting means for supporting a sheet, rotary supply means for feeding out the sheet, rotary convey means for conveying the sheet by a predetermined amount and then for effecting the registration of the sheet by a reverse rotation, drive means for driving the rotary convey means in a normal direction and a reverse direction, a switching output gear connected to the drive means so that a driving force from the drive means is transmitted to the switching output gear, and switching means for engaging the switching output gear with an input gear connected to the rotary supply means to transmit a rotational driving force of the rotary convey means to the rotary supply means, and for disengaging the switching output gear from the input gear.
摘要:
The present invention provides a sheet supplying apparatus having an extendible sheet support for supporting sheets, a sheet supply for feeding out the sheets supported by the sheet support, a shiftable separating claw capable of separating the sheets fed by the sheet supply, one by one, by engaging from corners of the sheets supported by the sheet support, a regulator for shifting the separating claw toward the sheet support in response to insert and retracting movements of the sheet support and a second separator for separating the sheets rested on an upper surface of the separating claw shifted toward the sheet support by the regulator, one by one, when the sheets are fed out by the sheet supply.
摘要:
A wiping mechanism for wiping an ink ejection side surface of an ink jet head for effecting recording by ejection of ink through ejection outlets includes a wiper for wiping the ejection side surface; and control mechanism for controlling operation of the wiper member in accordance with arrival of a carriage carrying the ink jet head and moving in a predetermined direction.
摘要:
The present invention provides a sheet conveying apparatus comprising a convey roller for conveying a sheet; a plurality of pinch rollers arranged along the convey roller and adapted to urge the sheet against the convey roller; a pinch roller holder formed as one piece for supporting the plurality of pinch rollers, the rigidity of the pinch roller holder in a sheet conveying direction being greater than the rigidity of the pinch roller holder in a direction perpendicular to the sheet conveying direction; and a biasing means for acting on the pinch roller holder to urge the pinch rollers against the convey roller.
摘要:
In the sheet conveying apparatus, convey force of a convey device is changed according to the load applied to a recording sheet in order to constantly convey the recording sheet reliably. A rotary sheet discharge body has convex and concave portions in order to reliably discharge the recording sheet regardless of resistance applied to the recording sheet. Highly frictional material is provided only around the end portions of the rotary sheet discharge body in order to reduce the manufacturing cost and improve the facility of assembly.