Patent GB-466432-A (GB)
Title: Container for photographic paper rolls and the like
IPC: G03B17/26
Filed: 1936-01-01
Abstract: 466,432. Containers for photographic paper &c. SANDT, K. Jan. 1, 1936, No. 51. Convention date, Jan. 3, 1935. [Class 18] A device for cutting rolls of light-sensitive papers, films, &c., into pieces of varying dimensions comprises one or more containers 8, Fig. 1, for the roll or rolls, a container 1 for one or more feeding and cutting mechanisms, and one or more containers 7 for the lengths of paper &c., the containers being adapted to be connected and disconnected with the exclusion of light. The roll may be carried on a spindle 9 which may be mounted in retractable trunnions, and the container 8 is in two halves hinged at 12, the edges 17, 18 meeting to form a nozzle and carrying pieces 19, 20, which engage a fixed spindle 21 to prevent accidental opening of the casing 8. A roller 15 bears on the paper &c. roll and is connected to an indicator 16. The containers 7 are held by flanges engaging slides on the lower side of casing 1. Access to the contents is had by means of a slide 23 and a second slide 24 permits the entry aperture to be closed for removal of the container. The slide 23 or the front wall may have a coloured window. Feeding and cutting mechanism. The web is fed inside the casing 1, Figs. 1 and 3 (shown in Fig. 3 as containing only one feeding mechanism) by pairs of discs 28<1>, 291 and 28<11>, 29<11>, of which discs 28<1>, 28<11> are fast on a shaft 32 and discs 29<1>, 29<11> are loose on a shaft 33 carried by a member 22 pivoted on fixed spindle 21, and are driven from discs 28<1>, 28". Discs 29<1>, 29<11> are of soft material. A stamping roller 35 inked by a gravity roller 38 is driven by a roller 34, fast on shaft 32. In order that the web may be positively lifted from discs 28<1>, 28<11>, a thin sheet frame 371, Fig. 5, is attached to pivoted member 32 to move therewith and the paper is fed through the frame which has slots to allow the feeding discs to contact the web. A cog 44 feathered on shaft 45 driven by pulley 46 is embraced by a fork 56<1> on a coupling rod 56 retracted by a tension spring 56<11> and having inclined surfaces 56<11> which can be engaged by corresponding surfaces on push rods 50, 51, 52 apertured to take the spindles 32, 33 and having projections 53, 54, 55 which can ride on the surface of cam ridges 40<1>, Fig. 4, of cams 40, 41, 42, or can be retracted within the cam ridge through the gap between the ends of the ridge by springs 83, Fig. 9. Since the gears 43, 44 mesh only in the position shown, the rotation of shaft 32 (and therefore the feed of the web) is restricted by the length of the cam ridge with which projection 53, 54 or 55 is engaged by actuation of the appropriate press button, 47, 48 or 49. The pivoted member 22 is moved to bring discs 291, 29<11> into engagement with discs 28<1>, 28<11> by contact with spindle 33 of the end of the slot in the push rod 50, 51 or 52. When it is desired to run the machine continuously to produce predetermined lengths, a stop 58, Fig. 4, is moved by a lever 57 into the path of a push rod so that when a projection 53, 54 or 55 leaves its cam surfaces, the push rod moves sufficiently to raise rollers 291, 29<11> and stop the feed of paper, but not so far that the projection does not reengage its cam on continued rotation of shaft 32. The cutting mechanism 30, 31 is actuated by a pin 60 on a disc 143, Fig. 5, or on one of the discs 28<1>, 29<1> or 34, carried by shaft 32, the pin 60 contacting an arm 62<1> of a pivoted lever 62 connected to a second lever 63, Fig. 3, which actuates connecting rods 64 secured to a jaw 65 carrying blade 31. Tension spring 66 returns the cutting mechanism to inoperative position. Hand actuation of the cutter may be effected by a press button 67. A modification adapted to stop the mechanism after a predetermined number of pieces has been produced embodies an extension 69, Fig. 10, on the pin 60 which at every rotation moves a plate 70 actuating a pawl 72 which rotates a disc 73 connected by a shaft 76, Fig. 9, to an indicator 77 to which an indicator crank 78 can be clamped in any desired position by a thumbscrew 81. By temporarily pressing a spring stud 79 into engagement with a hole 80 in the casing and rotating the wheel 73, a recess 77<11> in the indicator 77 can be brought to any desired angular relation with the position shown in Fig. 9. If the machine is now started, pieces will be separated until recess 77<11> reaches the position shown when a tooth 82<1> on a locking member 82 actuated by a spring 90 and carrying a bolt 88 which normally inhibits retraction of push rod 50, 51 or 52 to its inoperative position enters recess 77<11> and permits movement of member 82 so that the push rod is retracted and the feed stopped. A gap in the teeth of disc 73 may be arranged to stop rotation of the indicator 77 at a moment when the tooth 82<1> is not in engagement with recess 77<1> so that the machine then runs continuously. If the gap is so arranged that the indicator 77 stops when the tooth 82<1> engages recess 77<1>, the bolt 88 is rendered inoperative so that the machine normally stops at the end of each revolution of spindle 33.