Abstract: The apparatus comprises a conveyor (2) for feeding paper sheets into a cassette (4) in a stacker (2). The conveyor (2) can be switched between two positions such that successive documents are separated from one another by a lateral shift. The cassette (4) is lowered in the stacker (3) as the stack builds up. After the stack is completed the cassette (4) is turned by 180°, removed from the stacker (3) and inserted into a sorter (6). The sorter (6) picks up the documents one by one and pushes them onto a conveyor (7) which transports them to a finishing machine (8).

Abstract: A device for arranging sheets of paper (32) in a stack (33) having a frame (2) to be mounted fixed in place, with an inlet opening (62) for introducing the sheets (32) to be stacked. The arm (4) is pivotably seated at its rear end on the frame (2) and contains a conveying member (45) driven by a motor (43) for conveying the sheets (32). A container (3) is provided for receiving the sheets (32), with a vertically displaceable carriage (12) and a drive member (15) for displacing the carriage (12). The front end of the arm (4) is pivotably connected to with the carriage (12). There is a sensor (68) at the front end of the arm (4) for detecting the upper edge of the stack (33), and a control device (67), connected with the sensor (68) and the drive member (15), for maintaining the front end of the arm (4 ) at the height of the stack (33) being formed. Finally, an exchangeable cassette (28) for receiving the stack (33) can be inserted into the container (3).

Abstract: To provide for a single-sheet feeding to an office-type writing apparatus, such as a typewriter, word processor, printer or the like, in form of a separable attachment unit, a unitary assembly is provided including two parallel rockers (2, 12) having lateral sheet guide walls (12) which are located on a common shaft (9) connecting side walls of the attachment apparatus.

Abstract: An office writing machine has sheets fed to the platen (10) from a supply stack and correctly aligned at the print point by feeding the leading edge of the sheet past the contact line between the pressure roller (17) and platen. The platen is then reversely fed at least until the sheet leaves this contact line, at which point its precise position is known. Subsequent forward rotation of the platen advances the sheet exactly to the print point.

Abstract: Different copy elements, such as letterheads, unprinted sheets, envelopes or the like can be fed from different supply stacks (2, 3; 3a, 3b, 3c) by individual separating rollers (7, 8) which frictionally engage the uppermost of the copy elements of the respective stacks. The copy elements are fed into the gap between a platen (10) of the printer, and then deposited on an output stack. The selection of the copy element from the specific stack (2, 3 for example) is obtained by different angles of rotation of the platen, in reverse--that is, counter to the sheet feeding direction--to thereby, selectively, engage different ratchets and ratchet wheels of a coupling connected to the respective separating rollers which feed the copy elements from the respective stacks.

Abstract: Different copy elements, such as letterheads, unprinted sheets, envelopes or the like can be fed from different supply stacks (2, 3; 3a, 3b, 3c) by individual separating rollers (7, 8) which frictionally engage the uppermost of the copy elements of the respective stacks. The copy elements are fed into the gap between a platen (10) of the printer, and then deposited on an output stack. The selection of the copy element from the specific stack (2, 3 for example) is obtained by different angles of rotation of the platen, in reverse--that is, counter to the sheet feeding direction--to thereby, selectively, engage different ratchets and ratchet wheels of a coupling connected to the respective separating rollers which feed the copy elements from the respective stacks.

Abstract: To permit attachment of a single-sheet feeding and separating unit to various types and variously dimensioned office machines of different manufacturers, the sheet-feeding and guiding unit (1) is releasably attached (11, 17; 23) to a connecting frame (2) which is made specifically adapted to match a specific type model or manufacture of office machine (3). The frame (2) has a positive engagement latch (FIG.

Abstract: To provide for single-sheet feeding to an office-type writing apparatus, such as a typewriter, word processor, printer or the like, in form of a separable attachment unit, a unitary assembly is provided including two parallel rockers (2, 12) having lateral sheet guide walls (12) which are located on a common shaft (9) connecting side walls of the attachment apparatus.

Abstract: To separate sheets from a stack, for example being fed upwardly, two separating stages are provided: one separating stage is formed by a driven third feed roller (28) located immediately above a fixed separating element (30), for example a rubber block. If, by chance, two sheets should be fed, the sheets are then fed to a second separating stage which includes a driven second roller (16) which, for example, may drive the third roller, and a first roller (20) therebeneath which can freely rotate in feeding direction. It is secured to a shaft by a one-way clutch, preventing reverse rotation. To impart limited reverse rotation to the first roller (20), the shaft thereof is rocked backwardly by an eccenter (50, 52) coupled to the shaft (18) which drives the entire apparatus.

Abstract: To provide for feeding of single sheets to an automatic typewriter, output printer or the like, a feed roller (15) in engagement with the topmost sheet (11) of a stack is driven in intermittent movement by a connecting drive train (14, 20, 21, 22, 26, 28, 38, 40) which has as its input a pinion (10) coupled to a gear (3) rotating with the platen (2) of the writing apparatus. The intermittent drive is so arranged that, upon rotation of the platen, the drive train will transmit rotation to the feed roller (15) to feed a topmost sheet to the slewing mechanism (44, 44', 45) of the writing apparatus, and then permit free rotation of the feed roller, as the sheet is being transported by the writing apparatus, positive drive connection between the platen and the feed roller not being re-established until the platen has rotated sufficiently such that its circumferential path is slightly longer than the longest sheet to be fed, to thereby always re-establish feed of a new sheet from a predetermined reference position.

Abstract: A reflex photoelectric sensor (24) is provided to ascertain the precise position of a sheet of paper being fed around the writing roller 16 of an automatic typewriter or fast printer, to provide a signal from which the automatic drive of the writing roller can then advance the paper precisely so that what is written thereon will be in registry with pre-printed material on the paper, thus making it unnecessary to use edge-perforated long folded strips of paper in order to have precise location of lines automatically printed out on the paper.