摘要:
An apparatus and method to deskew sheets (100) in a short paper path in an electrophotographic printing machine by differentially driving two sets of rolls so as to create a paper buckle buffer zone (102) in the sheet (100) and then differentially driving a roll set (24,25,26,27) to correct the skew while the sheet (100) is still within the nips of multiple drive roll sets (24,25,26,27,34,35,36,37). Contrary to stalled roll techniques, leading edge damage to sheets is eliminated as the deskewing rolls are initially traveling at the same velocity as the sheet. Plural leading edge detectors (96,97) are used to measure the skew.
摘要:
Disclosed is a hybrid copying system for copying documents in desired non-linear page sequences for improved copying efficiency, particularly for duplex copying. Documents from a stacked set of documents are fed to the copying station of a copier and then selectively returned directly back to the opposite side of the copying station for copying interleaved between the feeding of other documents fed from stack, by a document return path (72,74) bypassing the stack and having a path length greater than the dimension of a document sheet. At least one document which has been copied on one side may be moving in this return path while another fed from the stack is being copied, and may also be inverted by an integral inverter (70) in the return path. For pre-collation copying this document return path may be coordinated with otherwise normal recirculation of the documents to and from the stack in an integrated but partially different recirculation path (72,73). Coordinated copy sheet duplexing systems are provided for improved efficiency duplex copying, preferably comprising a trayless duplexing buffer path (55,38) for circulating copy sheets from and back to the image transfer station (17) of the copier to eliminate intermediate copy sheet stacking and refeeding between first and second side copying. Various examples are provided for hybrid simplex and/or duplex and pre or post collation copying, including coordinated sorter operation.
摘要:
A fluid ejection system according to this invention operates on the principle of electrostatic or magnetic attraction. In various exemplary embodiments, the fluid ejection system includes a sealed diaphragm arrangement having at least one diaphragm portion and a diaphragm chamber defined at least partially by the at least one diaphragm portion, a nozzle hole located over the at least one diaphragm portion, an ejection chamber defined between the nozzle hole and the least one diaphragm portion and a secondary dielectric fluid reservoir containing a secondary dielectric fluid. The ejection chamber receives a primary fluid to be ejected. The secondary dielectric fluid reservoir is in fluid communication with the diaphragm chamber to supply the secondary dielectric fluid to the diaphragm chamber. In various exemplary embodiments, the secondary dielectric fluid is a liquid, a substantially incompressible fluid, and/or a high performance dielectric fluid having a dielectric constant greater than 1.
摘要:
A dual mode modular reproduction apparatus for selective different sheet printing modes with a common shared base frame unit (11) having integral module mounting guides (16) providing defined simple manual module mounting into the base frame unit into the same effective location of a xerographic engine module (12) with xerographic engine mounting elements (15) which mate with the module mounting guides (16) in the base frame unit for sheet printing xerographically, and an ink jet printing engine module (14) with mounting elements (15) which mate with the same module mounting guides (16) in the base frame unit (11) as the xerographic engine module to operatively mount the ink jet printing engine module in the base frame unit in place of the xerographic engine for sheet printing by the ink jet printing engine module. The xerographic engine module (12) and the ink jet printing engine module (14) are thereby readily manually interchangeable in the base frame unit (11) to provide a choice between xerographic printing or ink jet printing utilizing the same base frame unit. Preferably the xerographic engine module (12) is a monochrome printer, with a separate fuser module (50), and the ink jet printing engine module (14) is a plural color ink printer, and there is also a separate document imaging station module, mounted on additional module mounting guides in the base unit, to provide an easily changeable variety of different imaging products and shared components.
摘要:
In a digital copier in which the copies are made with a reciprocating inkjet printhead, the original image to be copied is pre-scanned at high speed and low resolution, to identify an area in the original image having white space. If the white-space area in the original image is sufficiently large, the action of the printhead can be adapted to skip the corresponding area in the copy sheet in the printing process, thus increasing the overall throughput of the digital copier. An analogous technique can be used to identify non-halftone or non-color portions of an original image, which can be printed with fewer than a maximum number of passes of the printhead over a specific area of the copy sheet.
摘要:
A dual mode modular reproduction apparatus for selective different sheet printing modes with a common shared base frame unit (11) having integral module mounting guides (16) providing defined simple manual module mounting into the base frame unit into the same effective location of a xerographic engine module (12) with xerographic engine mounting elements (15) which mate with the module mounting guides (16) in the base frame unit for sheet printing xerographically, and an ink jet printing engine module (14) with mounting elements (15) which mate with the same module mounting guides (16) in the base frame unit (11) as the xerographic engine module to operatively mount the ink jet printing engine module in the base frame unit in place of the xerographic engine for sheet printing by the ink jet printing engine module. The xerographic engine module (12) and the ink jet printing engine module (14) are thereby readily manually interchangeable in the base frame unit (11) to provide a choice between xerographic printing or ink jet printing utilizing the same base frame unit. Preferably the xerographic engine module (12) is a monochrome printer, with a separate fuser module (50), and the ink jet printing engine module (14) is a plural color ink printer, and there is also a separate document imaging station module, mounted on additional module mounting guides in the base unit, to provide an easily changeable variety of different imaging products and shared components.
摘要:
A dynamic edge guide (100, 125) for use in a sheet side-edge registration system may include a moving belt (101) having raised ridges (103, 104) thereon that form a channel into which the side-edge of a sheet to be registered is inserted sheets moved through the registration system by a transport device are side registered against the belt by a scuffer mechanism (81,82), with the transport device and belt moving at substantially the same speed. In this manner, any force tending to show a sheet being registered has nothing added to it by the contact between the sheet and the edge guide. The belt (101) may be replaced by a series of rotary contact rolls (125).
摘要:
A copier with a coordinated hybrid or non-sequential post-collation sorter operation is disclosed.The copier comprises a document feeder with a document bypass loop (72,74) for copying documents in desired non-linear page sequences with a trayless copy sheet buffer path (55,38) for circulating copy sheets from and back to the image transfer station (17) of the copier. Duplexed copy sheets are fed out from the buffer path in non-directly sequential page order and are properly collated by non-sequential sorter bin (46) loading sequences.
摘要:
A copier with a coordinated hybrid or non-sequential post-collation sorter operation is disclosed.The copier comprises a document feeder with a document bypass loop (72,74) for copying documents in desired non-linear page sequences with a trayless copy sheet buffer path (55,38) for circulating copy sheets from and back to the image transfer station (17) of the copier. Duplexed copy sheets are fed out from the buffer path in non-directly sequential page order and are properly collated by non-sequential sorter bin (46) loading sequences.