摘要:
An apparatus in which sheet basis weight is determined as a function of a change in angular velocity of a roller defining a nip through which the sheet passes. The sheet basis weight is calculated in response to the change in angular velocity of the roll before and after the sheet enters the nip. In an electrophotographic printing machine, the change in angular velocity of the fuser roll or pressure roll may be used to calculate the sheet basis weight.
摘要:
A method of binding sheets of a book having highly irregular edges while maintaining a flush thumb edge, includes applying a foam adhesive to the irregular edges and wrapping a spine tape with cold adhesive such that the spine tape contacts the book covers.
摘要:
In a printing system capable of printing and outputting collated sets of plural duplex copy sheets from input job sets of plural page images using a trayless duplexing buffer loop path of a known normal plural copy sheet length for recirculating the copy sheets imaged on one side back to be imaged on their opposite sides; operating in a continuous loop burst-interleave mode, using a variable speed duplex drive, for driving at least a major portion of the duplexing path sheet feeders at at least two different sheet feeding speeds so as to initially feed a limited number of the sheets to be printed on one side, less than the duplexing path length, at full rate without skips, to the duplexing path to be selectively partially fed therein at substantially higher than normal velocities, and to variably selectively reduce the velocity of the duplexing path with the initial sheets therein, to generate sheet interleaving spaces between these duplexing path sheets, so that they may be interleaved for their second side printing with subsequent first side prints until the final sheets of the job, which are also fed through the duplexing path at higher than normal speeds for different distances so as to close up interleaving spaces. This increases the duplex copying rate of the printing system by reducing or eliminating skipped pitches without requiring an increase in the given or normal printing rate.
摘要:
An apparatus to bilaterally register and deskew sheets in an electrophotographic printing machine by driving the sheet against a pair of stalled drive rolls and then activating the drive rolls when the sheet is deskewed. The drive rolls are then laterally translated while the sheet is within the nips of the drive rolls. The proper side registration position of the sheet is sensed and stored and the sheet is brought to that proper registration position. Once the sheet has passed through the drive rolls, the rolls return to the center of the paper path to receive subsequent sheets. A stepper motor is used to translate the roll pairs in a lateral direction and the pulse counts are utilized to store the side registration and sheet acquisition positions thereby eliminating the need for a home position sensor or switch.
摘要:
A copying and or printing apparatus including a duplex feeder for feeding sheets having had page image information copied/printed on one side thereof, back to a copying/printing station for transferring page image information to the other side thereof. The duplex feeder includes a buffer tray that can be positioned above and slightly upstream of a feeder tray. The buffer tray stores copy sheets exceeding the maximum capacity of the feeder tray such that the copier/printer can process a greater number of duplex copies in a single run.
摘要:
A document feeder capable of handling continuous length document materials such as computer fanfold, the feeder having spaced belts with angled projections thereon adapted to engage perforations in the document material to cause the document material to ride up on the projections during a feed cycle to lift the document material from the copy platen of the machine and prevent scrubbing of the document thereon.
摘要:
A sheet transport system incorporating a control for matching drive speeds imparted to a sheet extending between adjacent workstations is disclosed. The copy sheet is engaged by a receiving surface disposed between the workstations and is adhered to the receiving surface by vacuum. The copy sheet follows a path offset from a linear path extending between the workstations. Fuser rolls are driven at a slightly higher speed to tension the copy sheet and lift it from the transport surface. The lifting is detected by a sensor for sensing the vacuum in a plenum communicated with the receiving surface. The drive speed of the fuser rolls is controlled in accordance with the signal from the sensor.
摘要:
Apparatus is provided for forming an envelope capable of containing sheet material therein having a width equal to the width of the envelope by performing the steps of: feeding a sheet having a width and a length from a tray in a predetermined direction; folding the sheet across its width into a single fold to form first and second flaps, each flap having a width equal to the width of the sheet; pressing the first and second flaps together; and applying an adhesive tape over ends of the sheet to secure the first and second flaps together to form an envelope having an internal width at least the same as the width of the sheet, the adhesive tape completely forming the ends of the envelope. An insert sheet can be folded and placed between the first and second flaps prior to pressing the flaps together and, when a portion of the second flap which extends beyond the first flap is folded over the first flap prior to applying the adhesive tape thereto, the application of the adhesive tape will completely seal the insert material within the envelope so that the sealed envelope will be outputted "ready-to-mail".
摘要:
Position registration of sheets in a feed path is achieved without guides or gates. Laterally separated drive rolls are speed controlled to correct for skew mispositioning. Lateral registration is achieved by translation of the drive rolls transversely to the direction of sheet movement. Longitudinal registration is controlled by varying the speeds of the drive rollers equally. The system reduces the required paper path length to achieve correct registration, thereby allowing higher speed operation.
摘要:
Side registering a sheet during forward movement of the sheet with lateral movement of the sheet causing one side edge of the sheet to engage a registration edge guide, by moving the sheet with skewed rollers providing a sheet engaging and driving nip, wherein the registration edge guide is substantially in one plane but has a small localized arcuate deformation out of that plane adjacent the nip, causing localized arcuate deformation of the sheet, the nip also being spaced from the plane by a corresponding amount, the localized arcuate deformation of the edge guide and the spacing of the nip providing localized bending of a portion of the sheet at the nip for improved side registering. The registration edge guide is preferably substantially linear V-shaped slot engaging one edge of the sheet therein and directing it toward a smooth bottom comprising only a small portion of the slot and lying substantially in the plane except at the localized arcuate deformation.