초록 ▼

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 in

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.

대표청구항 ▼

For combination with an office writing machine (19), having a platen (10) rotatable in a forward sheet feeding direction (A) and in a reverse direction (B), apparatus, for feeding single copy elements from a stack (2, 3) of sheets, having separating rollers (7, 8) in engagement with a topmost sheet

For combination with an office writing machine (19), having a platen (10) rotatable in a forward sheet feeding direction (A) and in a reverse direction (B), apparatus, for feeding single copy elements from a stack (2, 3) of sheets, having separating rollers (7, 8) in engagement with a topmost sheet of the stack of sheets; drive means (42, 46; 44, 48) including gearing coupled to the separating rollers for driving the separating rollers to feed the topmost sheet to the platen, and a slip-free coupling element (20) coupled to the platen (10) and rotatable therewith in either direction, and further coupled to the drive means to rotate the gearing of the drive means upon rotation of the platen, wherein, in accordance with the invention, the gearing includes means (46, 84) for engaging the coupling element (20) with the separating rollers (7, 8) upon rotation of the platen (10) over a predetermined first angle in the reverse direction; means (42) for driving the separating rollers (7, 8) after engagement of the coupling element (20) with the separating rollers (7, 8) upon subsequent rotation of the platen (10) over a predetermined second angle in the forward direction; and means (55) for disengaging the coupling element (20) from the separating rollers (7, 8) after rotation of the platen (10) in the forward direction over the second angle.