Patent GB-704952-A (GB)
Title: Improvements in or relating to apparatus for feeding webs of paper to statistical machines
Inventor: JOHNSON WILLIAM EDWARD
Filed: 1950-06-06
Abstract: 704,952. Feeding papers in statistical machines &c. POWERS - SAMAS ACCOUNTING MACHINES, Ltd. May 21, 1951 [June 6, 1950], No. 14150/50. Class 100 (4) A web feeding arrangement for statistical and like machines comprises two feeding means (a) a friction feed including a rotatable platen 1 and (b) a pin wheel feed, either feed being selectively operable independently one of the other to couple it to a common driving mechanism including a driving wheel 7 supported freely on a shaft 2 carried by a main framework 3 and along which the platen 1 is freely rotatable and axially slidable for coupling or uncoupling it from the driving wheel 7. The platen 1 is secured in either position by a latch 12 carried on a boss 11 at the right-hand end of the platen engaging in either of two annular slots in the shaft 2. The coupling to the driving wheel 7 is effected by a pair of dowel pins 10 at the left-hand end of the platen which engage or disengage with corresponding dowel holes in the side of a driving wheel 7 fixed on a sleeve 6 driven by a ratchet wheel 8 operated by the machine. The driving wheel 7 meshes with an idler 30 to drive a gear 31 fixed to a pin wheel driving shaft 15 mounted between auxiliary frame members 16, 17 pivotally supported on the shaft 2. The left-hand pin-wheel 19 is connected to the shaft 15 for rotation therewith but is axially adjustable a small amount by a nut 20 against which the wheel 19 is urged by a spring 22. The right-hand pin-wheel 18 is axially adjustable for accommodating different width webs and located by means of a latch 25 engaging in one of a series of notches 26 in the shaft 15. Between wheels 18, 19 are two guide collars 28 which move axially when wheels 18, 19 are adjusted by means of springs 29. Cooperating with the wheels 18, 19 are slotted arcuate guides 37 pivotally mounted at 37a, Fig. 6, on slides 39 arranged for sliding movement in a slot 40 extending lengthwise of a bar 41 supported between the frames 16, 17. A guide plate 35 axially slidable on a stud is spring mounted to urge the web into contact with the rear of the pin wheels 18, 19. When it is required to thread either a plain or perforated web P the frames 16, 17, which are normally held in position shown by spring latches 46, 47, are pivoted clockwise so that lugs on the frames 16, 17 approximately in line with the bar 41, rest in notches 51 in the latches 46, 47 pivoted to the main frame 3, This enables the web P to be threaded between guides 32, 33, behind the pin wheels 18, 19, and after encircling the platen the web again engages the pin wheels passing behind the bar 41, and then between guides 33, 34. A plate 42 ensures the stripping of the web from the roller. When a perforated web is being used, the platen 1 is disconnected from the driving gear wheel 7 and a plate 57, Fig. 9, slidingly attached to the main frame 3 is moved downwardly so a screw 60 and a stud 61 are at the upper ends of slots 58, 59 and a part 63 and a lug 62 effect disengagement of friction rollers 54 and 52 by engagement with an arm 56 and arcuate arms 52a respectively. When a plain web is being used the rollers 54, 52 engage the platen which is moved leftwardly to engage driving gear wheel 7 and the pin wheel 18 is moved to an adjacent notch so that the web runs on the inner rim of the pin wheels. Alternatively, the frames 16, 17 together with shaft 15 and pin wheels 18, 19 may be removed from the apparatus during plain web feeding.