Patent GB-813961-A (GB)
Title: Improvements in or relating to spirit duplicating machines
Inventor: BRYER MORRIS
IPC: B41L11/00
Filed: 1957-05-16
Abstract: 813,961. Copying documents; feeding webs. JUNO MACHINERY Ltd. Jan. 7, 1958 [May 16, 1957], No. 15635/57. Classes 100(1) and 100(2) A spirit duplicating machine comprises two rotatably mounted coacting rollers 6, 7 a drive handle 80 being provided on the shaft of the roller 6, a moistening roller 5 for moistening a web of copy paper 72 with spirit, and a feed spool 54 and takeup spool 45 whose axes are parellel to the axes of rollers 6, 7, the spool 45 serving in operation to wind on a master web 70 after it has been unwound from the. spool 54 and fed in contact with moistened copy paper between the rollers 6, 7. As shown in Figs. 1 and 2, the machine includes two side frame members 1 between which are mounted the rollers 5, 6, 7, a guide roller 32, and a tank 34 for the moistening spirit. Vertical slots 4 are provided in the frame members 1 for laterally locating the spindles of the rollers 5, 6 and 7 whilst allowing vertical movement. The rollers 5, 6, 7 may be interconnected by gearing. The rollers 6, 7 are rubber covered and the spindles are provided with collars 8 to prevent longitudinal movement. A bearing shoe 9 is located in each slot 4 above the roller 7 and the rollers are urged into contact by springs 10 in the slots 4 between the head of a bolt 11 in each shoe 9 and a bolt 12 extending downwardly from the top of each frame member 1. Cam arms 13, 14 are pivotally mounted at 20 and 19 respectively on stub shafts 15, 16 extending from each frame member 1. The cam arms are of L-shaped cross-section the horizontal portions being adapted to bear against the spindle of rollers 6, 7 and against a cam plate 21, pivoted at 23 and having an operating handle 28. Rotation of the cam plate 21 in a clockwise direction as viewed in Fig. 1 causes the arms 13 to rotate anti-clockwise and the arms 14 to rotate clockwise thus raising the spindles of the rollers 6, 7 so that the rollers 5, 6 and 7 are out of contact with each other. The moistening tank 34 is supplied with spirit from a tank, clipped to the machine housing, by means of a pipe 38. A further pipe 37 is provided between the two tanks whereby the level in tank 34 is kept at a constant level. Slots 71 are provided in the frame members 1 for locating the spindle of a roll of copy paper. The copy paper is led over a guide lip 90 on the tank 34 between rollers 5 and 6 where it is moistened, over guide rollers 32, and between rollers 6, 7 where it is printed by the master web 70. Two vertical brake plates 73 are provided for the roll of copy paper 72. Each brake plate is mounted by means of compressed springs 78 which bear against bolts 74, 75 in the frame members and against bosses 79 on the brake plate. The take up spool 45 has end plates 46, 47 on each of which a boss 49 having a centre spot 48 is provided. The feed spool 54 is exactly similar. The spool 45 is mounted between the frame 1 by a centre pin 55 co-operating with the spot 48 and a dog pin 56. The pin 55 is movable axially of the spool 45 and is urged into contact therewith by a spring 59. The pin 56 is provided with a collar 60 in which notches are formed into which fit lugs 53 formed on the bosses 49. Mounted in the pin 56 is a pulley 68 slightly larger in diameter than a pulley 67 mounted on the shaft of roller 7, so that when drive is transmitted from the roller 7 to the spool 45 by means of a belt 69 travelling around the pulleys 67, 68 the master web is maintained tensioned. The spool 54 is mounted between a spring-loaded centre pin 66 and dog pin 64 similar to the pins 55 and 56 for the spool 45 except that a restraint mechanism is provided for the pin 64. The mechanism comprises a disc 51 secured to frame 1, a friction disc 62 and a backing member 63 urged against the disc 62 by a collar 93 bearing a spring 91 disposed in space 63<11> of the member 63. The collar 93 is adjustably located on the pin 64. In a second embodiment (Fig. 7) the guide roller 32 is omitted the copy paper 172 passing directly around roller 216. The machine side frames are provided with slots 204 in which are located bearing blocks 201, 202 and 205 for the shafts of moistening roller 105 and rollers 106 and 107. The rollers are urged into contact by springs 110 and are driven by a handle 180 having a gear wheel 214 which meshes with gear 215 on the shaft of roller 105. A gear 216 on the shaft of the roller 106 meshes with gear 215 and with gear 217 on the shaft of roller 107. The roll of copy paper is supported in slots 171 in the frame members and feed spool 154 and take-up spool 145 are provided for the master web as in the embodiment of Fig. 1. A cam plate 209 having an operating lever 128 is pivotally mounted at 123 on the side of the machine. The cam plate 209 is provided with slots 207, 208 through which the spindles of rollers 107 and 106 pass. The slots are shaped so that on rotating the cam plate in a clockwise direction the rollers 106 and 107 are first separated from each other, and, as rotation progresses, the roller 106 is then separated from the roller 105. The spools 45 and 54, and 145 and 154 are interchangeable and each may be used as a feed or take-up spool thus obviating the necessity of rewinding the master web when it has been completely taken up.