Patent GB-235720-A (GB)
Title: Improvements in decalcomania transferring machines
IPC: H04L17/20
Filed: 1924-06-24
Abstract: 235,720. Chadwick, G. June 24, 1924. Transferring designs. - In a decalcomania transferring-machine of the kind in which transfer tape is fed intermittently beneath a reciprocating presser or iron, the feeding device is actuated by the means for actuating the presser and feeds the tape in a path immediately in front of the operator to allow the designs to be inspected prior to their application. The presser or iron 13 is carried by a slide 8 reciprocated in guides 6 by a lever 27, link 34, and pedaloperated lever 30. The transfer tape 20 passes from a spool 37 under a tensioning-wire 48 carried by a frame 21 on the upper end of the slide 8, and guide rollers 24, 23 also carried by the frame 21, and down the front of the machine in view of the operator. It then passes under spring-pressed rollers 18 carried by a plate 12 fixed to the slide 8, and over a roller on the pin 47 connecting pairs of links 46, 42, which are pivoted respectively to the member carrying the rear roller 18, and to a shaft 40 on the frame. From this roller the tape passes over a roller on the shaft 40, under a roller 43, over the feed drum 38, and round a pair of rollers 51, 52. The roller 43 is carried bv arms 41 loose on the shaft 40 and is pressed against the drum 38 by a spring 44 which also tends to move the links 42 into .alignment with the arms 41. The rollers 51, 52 are mounted in a bracket 49a held by a spring 54 so that the roller 51 contacts with the drum 38, and the roller 52 is held in contact with the roller 51 by a spring 53. The drum 38 carries a ratchet wheel engaged by a pawl on an arm 57 connected by a link 58 to a collar 59 adjustably fixed to a vertically slidable rod 60, the upper end of which is in the path of the lever 27. A spring 62 raises the rod 60 to effect the idle stroke of the pawl, such stroke being limited by the engagement of the collar 59 with an arm 61 on the frame. To facilitate, adjustment of the collar 59 to vary the feed the rod 60 is graduated, and to obtain a very fine adjustment a number of ratchet wheels having their teeth in staggered relationship may be provided, a corresponding number of pawls, or a single wide pawl, co-operating therewith. An adjustable plate 49 is placed behind the tape 20 in front of the operator and is adjusted in position so that the upper edge of a transfer design registers with the upper edge of the plate when a preceding transfer is in correct position beneath the iron 13. If, during the operation of the machine, the transfers creep beyond or lag behind their correct position, the operator adjusts the feed to restore the register. An additional plate 67 for the same purpose, adjustable on wires 68, may also be provided. The guide rollers 18 are normally held depressed by their springs so that the tape is clear of the surface of the iron 13, but are raised by engagement with the work upon the table 7 when the slide 8 is depressed. The face of the iron is preferably rectangular, its length being determined by the maximum width of tape which the machine is designed to use. When the machine is working with a narrower tape, the iron may be turned through a right-angle.