GB1237599A - Improvements in machines for folding paper and other sheets - Google Patents

Abstract

1,237,599. Folding sheets. KEMP APPLICATIONS Ltd. 12 Jan., 1970 [21 Feb., 1969], No. 9566/69. Heading B8R. A sheet folding device comprises oppositely rotating members 54, 55, each haying a male creasing member, e.g. a blade 60, and a female creasing member, e.g. a pair of rollers 65, 65 forming a nip and urged together by a spring 67, and a feed mechanism for feeding the sheets between the members, the feed rate and the rate of rotation of the members 54, 55 being adjustable relative to each other by a control device so that the spacing of the creases can be varied. A sheet 103 fed into the device between a guide plate 10, jockey rollers 31 and feed conveyer belts 13 breaks an adjustably positioned contact 36 which overrides a cam and microswitch 88 circuit causing a motor 73 to rotate the creasing members 54, 55 after a predetermined time delay. The blade 60 of one member pushes the sheet between the rollers 65, 66 of the other, further rotation of the members causing the arm 71 of a lever 70 on roller 65 to abut a fixed pin 104 to rotate the rollers slightly in a direction which pulls the sheets further into the nip. On further rotation of the members, the blade is pulled from the nip and the arm 72 of the lever 70 abuts a pin (105), Fig. 3c (not shown), rotating the rollers to discharge the creased sheet. This operation is repeated, the sheet collecting in concertina fashion on a stationary conveyer 92. When the trailing edge of the sheet has passed a contact 37 a circuit is actuated to stop the conveyers 13, sheet deflecting rollers 43 and disc rollers 44, 45, 46. The contact 36 is also actuated so that after a predetermined time delay, the cam actuates the microswitch 88 and the creasing member motor 73 is stopped by a disc brake. This circuit also actuates the conveyer 92 to remove the folded sheet. Alternatively, the sheet may be removed continuously.