Patent GB-989974-A (GB)
Title: Improvements in and relating to paper and like sheet folding machines
Inventor: BROWN KENNETH HENRY
IPC: B65H45/18
Filed: 1962-11-23
Abstract: 989,974. Feeding sheets; folding paper. CUNDALL FOLDING MACHINE CO. Ltd. Nov. 22, 1963 [Nov. 23, 1962], No. 44379/62. Headings B6B and B6H. A sheet folding machine includes a sensing device which is actuated if two or more sheets pass through it simultaneously, said device comprising a detector and feeler between which a sheet passes and which act at a plurality of intervals to sense the thickness of the sheet passing and between such intervals provide a gap therebetween of such a width that the sheet may be moved laterally. Controlling sheet-feeding mechanism.-A sheetcallipering device, Fig. 1, comprises co-operating rollers 2, 3. Roller 3 is carried on one arm 4 of a cranked lever 5. The latter is pivoted at 7 and urged clockwise by a spring 11. Its position is adjusted initially by a screw 10 abutting a fixed stop 9. A micro-switch 14 is attached to a pivoted, spring-loaded, member 15. The position of the member 15 is adjusted by screw means 17, so that the operating member 13 of the micro-switch normally engages the head of a screw 12 at the free end of the lever 5. The passage of more than one sheet at a time through the callipering device, lifts the roller 3, whereby the screw 12 disengages the microswitch 14 to stop the sheet feeding mechanism and associated paper folding machine. The roller 2 has a groove 20 extending around part of its circumference and in line with the roller 3, Fig. 2 (not shown). As a sheet passes through the device, the roller 2 will rotate a plurality of revolutions depending on the length of the sheet. With each revolution, the groove will pass beneath the roller 3 so that sensing ceases momentarily and the pressure on the sheet will be released. During these intervals, the sheet may be moved laterally to register it against a side gauge. Registering.-Endless tapes 26, Fig. 3, passing over rollers 21, 22, are included to a side gauge 27. The rollers are mounted in self-aligning bearings 23 carried by side bars 24, 25. Side bar 24 is fixed in position. Side bar 25 includes members 35, 36 and 37 movable longitudinally of the machine frame. One end of a pivoted L-shaped lever 28 engages the member 35 in a pin-andslot connection 30. The other end is moved by screw means 32-34 to adjust the longitudinal position of the side bar 25. Thus the inclination of the rollers 21, 22 and hence the endless tapes 26 may be adjusted. The position of the side gauge 27 is varied by screw means 39a and 39b. Folding paper.-The sheet passes over a table 47 and is folded by a reciprocating knife 46 and co-operating rollers 48, Figs. 6 and 7. The knife is supported by an upright post 49 slidable in supports 50 and reciprocated by means of a rotating cam 58, operating rod 55, a pivoted triangular-shaped lever 52, and roller 51 on the post 49. The right-hand roller 48 (see Fig. 7) is supported by a U-shaped member 68 pivoted at 69. The left-hand roller 48 is supported by a rod 74 slidable in a support 75. The rollers may be moved apart by means 70-73 and 79-85, respectively. Thus to render the folding knife inoperative, the rollers are moved apart and the knife lowered between the rollers with the top thereof flush with, or below, the table 47. To lower the knife the lever 52 is moved out of the path of the roller 51. A second folding knife 60 and rollers 61 are provided at right-angles to the abovementioned knife and rollers. The knife 60 is carried by an arm 62 pivoted at 63 and oscillated by a cam 66 and follower 65. A slidable bar 60a on the knife 60 may be moved to engage a fixed support 60b to hold the knife in an inoperative position with the follower 65 clear of the cam 66. The speed of rotation of the main drive shaft driving the sheet feed and the cam shaft 59 driving the folding mechanisms may be varied independently through variable speed gears. Means are provided for limiting the ratio setting of one variable speed gear in relation to the other. Specification 989,975 is referred to.