Patent GB-1017858-A (GB)
Title: Improvements relating to methods and apparatus for preforming a record card
IPC: B31D1/00
Filed: 1964-10-27
Abstract: 1,017,858. Grinding. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 27, 1964 [Nov. 26, 1963], No. 43683/64. Heading B3D. [Also in Division B4] A method of preforming a record card so as to form a mount for a film or the like comprises forming a depression on one side of the card of a depth less than the thickness of the card and having a periphery corresponding to the shape of the film to be mounted and a corresponding embossment on the reverse side of the card, removing the material forming the embossment so as to leave a web portion part of which can subsequently be removed to form an aperture across which the film can be mounted, the apertures being formed by knives carried by the embossing means, and further compressing the web portion. In apparatus for carrying out the method, record cards 10, Fig. 1 (not shown), are successively fed from the bottom of a stack through rollers 12, 13 to embossing means consisting of rollers 14, 15, roller 14 having a raised part 16 which co-operates with a recess 17 in the roller 15 to displace a part 19 of the card 10, Fig. 5 (not shown), from one surface 22 of the card and form a recess less than the depth of the card on the other surface. The part 16 may also be provided with knives 21 which form scores 39 in the part 19 corresponding to the size of the aperture to be formed in the card. After embossing and scoring the cards are fed by rollers 26, 27 to grinding means consisting of a grinding- wheel 28 and a vacuum back-up roll 29 having an outer shell 30 rotatable on a centre portion having a port 31 which is connected to a source of vacuum and co-operates with ports 32 in the outer shell so that the card is held against the back-up roll as the grinding wheel removes the embossed part of the card, the card then having a shoulder 18 which is for supporting the film and connected by small tufts 40 left by gaps between the knives 21 to the part 19. A vacuum chamber 34 is disposed at the exit side of the grinding means and is formed with apertures 35, 36 for sucking dust from the card and the surface of the grinding wheel. After grinding, the cards are fed by rollers 41, 42 to a mechanism having a roller 46 for applying a sealant to the ground area of the cards and then to a device having a roller 48 for applying a non- tacky heat-sensitive adhesive to the surface of the shoulder 18. Finally, the cards pass below a spring-pressed blade member 52 which breaks the tufts 40 to eject the parts 19 so leaving an aperture in the cards, the cards then being fed by rollers 58, 59 to a stacker 60. The apparatus may not include the means for making the apertures, in which case the apertures are made by a punch and die. The film is then placed on the adhesive coated shoulder and a heated platen is placed on the film to soften the adhesive so that it secures the film to the card. In another embodiment, the embossing covers the area of the shoulder 18 only and the scoring is effected along the inner edge of the shoulder adjacent the untreated central part 19. After grinding to remove the embossing, the card is passed through rollers having portions which act to compress and stiffen the shoulder portion. The embossments may be removed by a cutting or shaving means in place of the grinding means.