Patent GB-824071-A (GB)
Title: Apparatus for mounting inserts in cards
IPC: G03D15/10
Filed: 1957-10-10
Abstract: 824,071. Cutting-apparatus. MIEHLEGOSS-DEXTER Inc. Oct. 10, 1957 [Nov. 8, 1956], No. 31725/57. Class 31 (1). [Also in Groups XV and XVI] Apparatus for cutting sections from a strip of sheet material comprises two relatively movable co-operating members between which the strip is advanced and each having a cutting edge extending across the width of the strip, opposed guides for engaging the longitudinal edges of the leading section-defining end portion of the strip as the same is advanced past the cutting edges and thereby to hold the said end portion in the plane thereof, means for imparting relative movement to the members towards each other to sever the end portion from the strip, and means for moving the guides away from each other clear of the end portion of the strip before the members upon relative movement thereof towards each other reach a position at which the cutting edges substantially engage the strip. The apparatus is adapted for severing sections from a strip of micro-film for mounting in apertured cards and is adapted to be used in a system which permits the scanning of the strip while it is being fed, and before the individual sections are cut therefrom and mounted in the cards. As shown in Fig. 10, a card 10 has an aperture 11 in which is mounted a section 14 of micro-film, the section being retained in the aperture by means of a transparent border 12 which has its face overlying the marginal edge of the section and the edge of the aperture, coated with an adhesive. The aperture 11 is of such width that it accurately receives the uncut longitudinal edges of the film section 14. The scanning system comprises a light source 21, Fig. 13, from which light passes through a condensing lens unit 20, a transparent anvil. 56 and fixed and movable dies 16, 17 respectively. The light emerging from the die 17 passes through a lens 22 and prism 24, being then reflected successively by mirrors 25, 26 to fall upon the rear surface of a translucent screen 27 which faces the operator. The cutting apparatus comprises a table 29, Fig. 1, supported on legs 30, 31, and carrying a front assembly 32 and a rear assembly 34. The assembly 32 includes the lens set 20, the anvil 56, a card guide and support, a card end stop, the die 16 and upper and lower retractable edge guides for the film strip. The assembly 34 includes the die 17, means for reciprocating the die and means operated by advance of such die for retracting the edge guides for the film strip. The anvil 56 is supported through the intermediary of a resilient ring 57, Fig. 4. As shown in Fig. 6, the fixed die 16 comprises upper and lower sections 65, 66 and side sections 67, 69, connected together as a unit. A card-receiving slot 76, Fig. 4, is formed between the die 16 and the anvil 56. Each of the die sections 67, 69 has a film strip-receiving passage 79 therethrough. The inner edge of the forward surface of each of the passages 79 is in the form of a concave shearing edge 77. The card is introduced into a narrow throat between an adjustable plate 82 and the bevelled surface of a bracket portion 42 adjustably secured to the plate 29. The plate 82 has an adjustable ledge 90 secured to the lower edge thereof and loosely received in a horizontal transverse groove 91 formed in the rear face of the bracket portion 42. The card is positioned in the correct lateral position by means of an adjustable stop 106. The film strip is fed off a supply reel 115, Fig. 1, to pinch rollers 120, 121 which feed it through a guide channel 112. The reel 115 is supported on a platform 116 which has adhesively secured thereto an upper layer of reel-retarding material 119, e.g. cork, upon which the lower flange of the reel 115 rests. The roller 121 is idle and the roller 120 is selectively manually driven by means of one of two knobs 129 on a cross-shaft 125 provided with a helical gear 126 engaging a similar gear 127 on a vertically-adjustable shaft 118 supporting the roller 120. The rear assembly 34 has a main bracket 130, Fig. 4, adjustably secured to the plate 29. The movable die 17 is provided at its rear end with a flange 139 secured to a cross-head 137 which is supported and guided for rectilinear movement by means of guide rods 141 extending rearwardly from and secured in the sections 65, 66 of the fixed die 16. The cross-head is further guided by means of spaced tracks 142, Fig. 1, secured to the bracket 130 and having movable therein rollers 143 journalled on stub shafts secured in the cross-head. The cross-head and movable die are reciprocated by means of toggle links 145, 146, Fig. 4, which are operated by means of a handle 161 through the intermediary of equalizing linkage. An extension 170 of a spring-influenced bell-crank lever 164 cooperates with adjustable studs 172, 174, to determine the extent of the retraction and advance of the movable die. The rear assembly 34 is positioned by means of adjustable stop means 135. The retractable guides 175, 176, Fig. 6, are formed with opposed grooves 178 to engage the upper and lower edges of the film strip 15. The guides are secured to spring- influenced plungers 177 received in bores 179 in the die sections 65, 66. Inward movement of the guides is limited through abutting engagement of the inner ends of the plunger 177 with the leading end portion of the retracted die 17 as shown in Fig. 4. The guides are retracted by means of pins 187 secured in the flange 139 of the die 17 and co-operating with bores 185 in the plungers. The outer side portions of the die 17 are preferably in the form of individual blades removably held on the body of the die by means of pins. Operation.-It is assumed that the lamp 21 has been illuminated, that the film strip 15 has been drawn from the reel 115 and has been threaded between the rollers 120, 121 and hence into the guide 112, and that the card supporting and guiding ledge 90 and the end stop 106 have been suitably adjusted. The operator then advances the film strip, by turning either of the knobs 129, through the passage 79 in the die section 69 so that the upper and lower edges of the film strip enter the grooves 178 in the guides 175, 176. Feeding of the film strip is continued until the image on the screen 27 indicates that the full picture of the section to be cut out is in accurate register with the opening 18 through the die 16. The card 10 is then inserted edgewise in the correct position with the adhesively-coated surface of the border 12 facing the film strip, as shown in Fig. 11. The operator then depresses the handle 161 thereby causing the die 17 to move further into the die 16. Before the forward end of the die 17 reaches the guides 175, 176, the pins 187 will have entered the bores 185 in the plungers 177 thereby moving the guides from the path of the die 17 and from engagement with the film strip. Immediately thereafter, the four corners of the film section to be cut out from the film strip are clampingly engaged between the outer elevated ends of the cutting edges 77 of the die 16 and the forward cutting edges 23 of the die 17. Continued forward movement of the die 17 causes the film section being cut to be moved forwardly and to be progressively sheared at its edges by cuts extending inwardly from the corners and lying along the planes of the cutting edges 77. The severed film section 14 is then moved forwardly by the die 17 into the aperture 11 in the card 10 and pressed by the die into engagement with the adhesively-coated border 12. as shown in Fig. 12. After the film section has been mounted in the card, the handle 161 is released, whereupon the parts are returned under spring action to the starting positions shown in Fig. 4.