Abstract:
A sheet stacking apparatus which is capable of reliably sandwiching or catching sheets, and also capable of providing control so as to ensure reliable conveyance of succeeding sheets during the catching operation. A stack tray is provided downstream of a processing tray that stacks sheets. A position on the stacking surface of the stack tray at which the leading end of a sheet having its trailing end passing a discharging section, which discharges sheets toward the processing tray, contacts the stacking surface is lower in level than the highest portion of the processing tray. A swinging arm that discharges the sheets stacked on the processing tray to the stack tray is capable of selectively assuming a catching state in which a sheet discharged to the processing tray is caught by the swinging arm, and a non-catching state in which a sheet discharged to the processing tray is not caught by the swinging arm. The swinging arm is controlled to assume the non-catching state when the discharging section starts discharging a sheet, and switch to the catching state before the trailing end of the sheet discharged by the discharging section passes the swinging arm.
Abstract:
A method and device for stacking a plurality of vertically oriented mailpieces into a stack, wherein mailpieces are sequentially received into the back end of the stack. A paddle is used to support the front end of the stack in order to prevent the top mailpieces from falling forward. A conveyor belt is used to move the mailpieces in the stack and relieve the pack pressure so as to allow new mailpieces to join the stack. Information indicative of the mailpiece thickness is provided to a movement control module so that the conveyor belt is moved according to the thickness of the mailpieces received into the stack. As such, the pressure in the stack can be properly adjusted. The thickness information can be obtained from an upstream collator, for example.
Abstract:
When discharging a sheet material from an image forming apparatus after completion of image formation, at least one spur roller for discharging the trailing edge of the sheet material downward is provided. Hence, it is possible to more stably discharge the sheet material than ever, and to arrange and mount sheets of the sheet material on a discharged-sheet tray in a manner better than ever.
Abstract:
This invention discloses a method and apparatus for properly placing copy sheets from a high speed copy machine into an exit tray. The invention utilizes a variable speed motor to control the rollers which reside at the end of the paper path. One or more paper guides mounted to the drive rollers, enable the motor to operate over a wide range of speeds, yet still work efficiently. The motor accelerates to its highest speed as the copy sheet enters the nip between the drive and idler rollers, and is decelerated to its slowest speed as the trailing edge of the copy sheet exits the nip. The trailing edge of the copy sheet then moves off of the roller and onto the paper guide. The speed of the motor can then be increased without having to wait for the copy sheet to move into the output area. This substantially reduces the period of time required to reproduce copies.
Abstract:
A document accumulator comprising for high-speed document assembly includes first and second pulleys, a first outer belt extending between the first and second pulleys for contacting and transporting a document, a second outer belt extending between the first and second pulleys, and extending generally parallel to and horizontally displaced from the first outer belt, for contacting and transporting a document, and an inner belt generally parallel to and horizontally displaced from both the first and second outer belts such that it lies between the first and second outer belts. A first side guide has a first vertical surface adjacent to a horizontal reach of the first outer belt, and a second side guide has a second vertical surface adjacent to a horizontal reach of the second outer belt. A belt-dampening table having a horizontal surface adjacent to a horizontal reach of the inner belt is provided for dampening oscillations of the inner belts which occur at high speeds. At least two ramps for performing over- and under-accumulation are each mounted on a shaft connected at each end to a rotating assembly. Cam-type release levers permit the rotating assemblies, and thus the ramps, to be rotated and translated without the use of tools.
Abstract:
An apparatus and method for stacking sheets on a stationary stack is disclosed comprising conveying a sheet to a roller and rolling the sheet onto the stack of sheets. The roller is preferably moved across the stack of sheets by a carriage while the sheet is being rolled onto the stack.
Abstract:
An apparatus for sheet feed-out control is provided on an automatic sheet feeder used in conjunction with scanners, fax machines, printers, copiers, and the like. The apparatus comprises a feed-in roller set for feeding the sheet into a scanning position where a scanning process is performed and a feed-out roller set for pulling the sheet away from the scanning position and delivering the sheet onto a receiving tray. A pivotal pressing member is pivotally affixed proximate to the feed-out rollers. The pivotal pressing member is pivotally turned by the sheet as the sheet is being fed out of the feed-out rollers. As the sheet is entirely fed out of the feed-out roller set, the pivotal pressing member presses down against the tail edge of the sheet, thus flipping the sheet off the feed-out roller set. Since the sheet can be placed flat on the receiving tray right after it is entirely fed out of the feed-out roller set, a stack of sheets after being scanned can be piled up neatly on the receiving tray. Further, since the feed-out roller set and the feed-in roller set can be made according to the same specification, manufacture cost is significantly reduced.
Abstract:
An accumulator with first page hold feature having an accumulating area and a mechanism for feeding sheets of a first group of sheets to the accumulating area. An identifying mechanism is provided to identify the first sheet of a second group of sheets. The first sheet of said second group is fed but is stopped before the first sheet reaches the accumulating area. In the meantime, first group of sheets is released from the accumulating area and the first sheet of the second group is then released from its stopped position and fed to the accumulating area.
Abstract:
An apparatus for stacking, registering and attaching one or multiple sets of electrophotographic printing machine output. The copy sheets are discharged from the machine and fall into an inclined compiling tray and are longitudinally registered by flexible, endless belts contacting the top surface of each sheet. Each sheet is then laterally shifted by a tamping mechanism which has upwardly flared baffle to corrugate the sheet as it is shifted to increase the sheet beam strength and facilitate easier and more complete registration. The discharge nip assembly which includes the flexible belts is vertically adjustable either based on discharged sheet count or in response to feedback from a stack height sensor so as to maintain optimum contact by the endless registration belt and allow for high capacity compiling. The compiling tray can also be adjustable. Once a complete set of sheets has been discharged and fully registered the stack is then attached by stapling or other means and is discharged from the compiling tray. The discharge nip and compiling tray then return to their home position to accept the next set of copy sheets.
Abstract:
In a guiding device for aligning sheets of paper (13) being stacked in a stacking tray (11) to which the sheets (13) are fed by means of a feeding mechanism (3, 5), deflectable fenders (25 and 26) are provided which are suspended from a mounting element (27) located above the path of the sheets and which extend into the path of each sheet (13), and are contacted and deflected by such sheet. The deflected fenders (25, 26) exert pressure on the contacting surface of the sheet so that the sheet when released by the feeding mechanism (3, 5) enters the stacking tray (11) from above in a controlled manner. At least one (26) of the fenders (25, 26) takes the form of a loop consisting of a flexible web (28) whose two ends are united and suspended from the mounting element (27). As suspended, the flexible loop makes and maintains large area contact with the sheet until stacked resulting in sheets aligned laterally with respect to one another in the stack.