摘要:
A system for delivering desired magnitudes of AC power to a load. A three-cycle power mode includes a 1st and 3rd cycle in which either no AC power, or full power, is delivered to the load, and a 2nd cycle in which an AC switch is triggered at a desired phase angle to deliver the desired increments of AC power during the 2nd cycle. AC power is delivered in each cycle in a manner to provide a net zero DC offset in the AC current delivered to the load. A two-cycle mode can be achieved by using the 1st and 2nd cycle, or by using the 2nd and 3rd cycles to optimize power delivery performance. A multi-cycle power delivery system can employ both the three-cycle and the two-cycle modes together to minimize the harmonic content during delivery of various power levels.
摘要:
The embodiments disclosed herein are directed to methods and devices for a control system to regulate the output voltage of a high voltage power supply (HVPS) in an image forming device. In one embodiment, the HVPS comprises at least two voltage sources connected in series. A print engine controller is configured to disable at least one of the voltage sources when a voltage draw of a load exceeds a maximum differential voltage of the at least two voltage sources.
摘要:
The embodiments disclosed herein are directed to methods and devices for a control system to regulate the output voltage of a high voltage power supply (HVPS) in an image forming device. In one embodiment, the HVPS comprises at least two voltage sources connected in series. A print engine controller is configured to disable at least one of the voltage sources when a voltage draw of a load exceeds a maximum differential voltage of the at least two voltage sources.
摘要:
A system for delivering desired magnitudes of AC power to a load. A three-cycle power mode includes a 1st and 3rd cycle in which either no AC power, or full power, is delivered to the load, and a 2nd cycle in which an AC switch is triggered at a desired phase angle to deliver the desired increments of AC power during the 2nd cycle. AC power is delivered in each cycle in a manner to provide a net zero DC offset in the AC current delivered to the load. A two-cycle mode can be achieved by using the 1st and 2nd cycle, or by using the 2nd and 3rd cycles to optimize power delivery performance. A multi-cycle power delivery system can employ both the three-cycle and the two-cycle modes together to minimize the harmonic content during delivery of various power levels.
摘要:
A media retraction and recycler system for use with image processing devices such as automatic document feeders and printers that concurrently supports two media sheets for duplex printing or scanning in a partial overlapping configuration in a variable nip pressure exit roll assembly allowing use of a media path that is shorter than the total media length of the two media sheets to facilitate an increased throughput during duplex scanning or printing operations.
摘要:
A method for dynamically lifting an elevator includes picking a sheet from a stack to feed to a media process where the stack is on a platform that can be lifted by an elevator, performing the media process, sensing a top of the stack to detect presence or absence of the stack at a media home position, sensing the top of the stack to detect presence or absence of the stack on the platform, sensing the platform to detect its presence or absence at a maximum elevator level, and indexing the stack at least once by lifting the platform through a given distance, during the media process and not during picking a sheet, unless presence of the top of the stack at the media home position is sensed or absence of media sheets on the elevator platform is sensed or presence of the elevator platform at the maximum elevator level is sensed.
摘要:
A media handling system includes a platform, a bin supporting the platform below and for undergoing movement toward and away from a sheet feeding position, a first motion transmitting assembly coupled between the platform and bin and tailored to counterbalance the weight of the platform and any stack such that as the weight decreases the platform is lifted toward the sheet feeding position to maintain the stack top below a lower limit position thereof, a control mechanism to sense the position of the stack top relative to a given range between the lower limit position to an upper home position, and a second motion transmitting assembly drivingly coupled to the platform via the first motion transmitting assembly and responsive to the control mechanism sensing to cause the first motion transmitting assembly to further lift the platform to and maintain the stack top position within the given range.
摘要:
A printer is provided including a reference edge, a fuser assembly, a cooling apparatus and a controller. The reference edge is adapted to be contacted by a substrate as the substrate moves along a substrate path through the printer. The fuser assembly includes a heat transfer member including a belt and a backup member. The cooling apparatus is adapted to move cooling air capable of cooling the fuser assembly. The controller is configured to activate the cooling apparatus after determining that a first end portion of the backup member opposite a second end portion of the backup member near the reference edge is at a temperature above a predefined first threshold temperature.
摘要:
An image forming device in a color printer or the like includes duplex printing. Multiple media sheets are moved through a media path which includes a primary path and a duplex path. Various parameters of the image forming device control the interpage gap between sheets. Parameters include peek-a-boo duplexing, sharing of motors within the drive rollers, and sharing of power supplies.
摘要:
An ink jet print cartridge is provided for use in an ink jet printer. The cartridge comprises a printhead including a heater chip. The printhead is adapted to generate ink droplets in response to the heater chip receiving energy pulses from a printer energy supply circuit. A peltier effect cooling cell is associated with the heater chip for cooling the heater chip. The cooling cell receives current from the printer energy supply circuit as a function of energy flow to the heater chip.