Patent GB-1025983-A (GB)
Title: Improvements relating to apparatus for temporarily supporting a film
IPC: B31D1/00
Filed: 1964-05-04
Abstract: 1,025,983. Grinding. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 4, 1964 [May 6, 1963], No. 18365/64. Heading B3D. [Also in Divisions B2, B4 and B8] Apparatus for temporarily supporting a film comprises a film supporting member having a surface adapted to receive said film, a plurality of interconnected recesses in said surface, at least one additional recess extending adjacent one edge of said surface, and means for temporarily providing low pressure simultaneously in each of said recesses so as to hold the film against the surface, the pressure in each of said additional recesses being independent of pressure in the other recesses. The invention is used in a film record card producing machine (Fig. 1, not shown) in which plain record cards 11 are fed from a hopper 10 on to a conveying vacuum drum 15. The drum 15 carries the cards past successive grinding wheels 24, 25, the first of which produces a rectangular shoulder depression in each card and the second removes any burrs produced by the first. To assist the grinding operation the drum 15 has steel inserts with raised portions corresponding to the configuration of the frame or border to be ground. The cards are then carried to a scoring and chip removing station comprising a drum 29 which has on its periphery a number of scoring units 30, each of which consists of a rectangular series of knives for cutting an aperture in each card inside the rectangular depression, and piercing elements 36 for removing the cut-out chip and depositing it in container 37. The cards are then conveyed to a film applying station where a strip of film 40 is cut into individual pieces by cutter roll 47 and temporarily supported on vacuum transfer drum 50 where they first receive a border of adhesive from roll 81 and are then applied to the ground shoulder portions of the cards 11 on drum 15 such that they adhere over the apertures therein. The completed record cards are finally removed from drum 15 at guide 84 and fed to suitable stacking and conveying means. The transfer drum 50 which temporarily supports the film pieces is fixed on a driven shaft 51 (Fig. 5) and has on one side a vacuum control plate 55, loose on shaft 51, and pressed against the drum by spring 59. The plate has a connection 57 to a vacuum source and another connection to atmosphere, together with ports for alternatively connecting surface areas of the roll 50 to vacuum and to atmosphere as the roll rotates for first holding the film on the surface during the adhesive applying operation and then for releasing the film when it has been applied to a card on the drum 15. The roll 50 consists of a central core with a number of segments 67 secured thereto, each segment having a plurality of raised areas 71 disposed within a raised border 72 so as to form interconnected channels 74, the latter being in communication with ports for connecting with the plate 55. An additional channel 78 also having ports for connection with the plate 55 is provided for holding the leading edge of the film piece as it is first fed on to roll 50.