Patent GB-656178-A (GB)
Title: Improvements in or relating to machines for binding books
IPC: B42B5/12
Filed: 1947-08-08
Abstract: 656,178. Coiling. SPIRAL BINDING CO., Inc. Aug. 8, 1947, No. 21879. Convention date, June 4,11941. [Class 83 (iv)] [Also in Group XV] In a machine for binding books [Group XV], means are provided for feeding a helicallyshaped wire binder through successive sets of apertures in the pages of a book, cutting the binder to the proper length and bending the ends thereof to lock the binder in position. The wire is fed from a reel 2, Fig. 1, during the binding operation to straightening rollers 5, through a guide tube 6 by continuously rotated feed rollers 7 and 8 which feed only sufficient wire to complete the binding of each book. Wire from the rollers 7 and 8 passes through a guide tube 9, Fig. 5, to a die 10 where it is fed over a tapered mandrel 13 which fits into a bore 11 having a spiral groove 12. The mandrel 13 may be adjusted axially relative to the groove 12 by a threaded rod 14 and a nut 15. The outer end of the mandrel carries a pilot portion 16 which guides the spirally formed wire towards the apertures in the book. As the wire passes through the perforations in the sheets it is guided by slots 185 in the table 23 and slots 45 in a shoe 36, clamping the pages on a table 23. The feed roller 7, Fig. 7 is journalled in a block 114 slidably mounted in a guide 115 and moved towards the roller 8 by movement of a cam lever 111 against the action of a spring. A plate 134 driven from the shaft 94 of the roller 8 carries a circumferentially adjustable knob 135 which engages a lever 136 operating the lever 111 to disengage the feed roller 7 after a predetermined length of wire has been fed. The cutting and bending of the ends of the binder are performed by two similar cutting and bending units 156, Figs. 1, 11, 13 and 14, raised by a shelf 154 reciprocated vertically by a lever 147 and link 151 from a cam 72 on the shaft 59. The units 156 each comprise a body portion 165, Figs. 13 and 14 having a dove-tailed slot 166 inclined at an angle corresponding to the pitch angle of the spiral and in which slot is slidable a block 167 carrying a slide block 168 slidable in a horizontal guideway 169 on the table 23, thus providing for vertical and horizontal adjustment of the unit. An extension member 30 of triangular crosssection extends parallel to the centre line of the slot 166 from the body portion 165 and is adapted to enter between the coils of the binder on the upward stroke of the portion 165 and shelf 154. An extension 181 on the portion 165 carries anvils 179 and 180 adapted to pass on either side of one coil of the wire during the upward movement of the body portion 165 caused by the vertical movement of the shelf 154. A blade 173 is fixed on the portion 165 directly below the anvil 180. A movable blade 175 formed on an arm 176 rotatably mounted by a bearing portion 176<SP>1</SP> in the portion 165 is associated with the blade 173. The arm 176 is normally maintained in its uppermost position by a coil spring 182 but may be depressed by a ring 178 through which a lever 163 passes. When lever 163 is moved downwardly, Fig. 11, by rotation of shaft 162 the movable blade 175 moves towards the fixed blade 173 and cuts the portion of wire extending between their cutting surfaces. Further movement of the blade 175 between the anvil 180 and the blade 173 causes the portion of wire immediately above the cut to be bent about the lower left-hand edge of the anvil 180, Fig. 13, and be extended inwardly parallel to axis of the spiral wire. If hooked page aligning members 29 provided on a shaft C are unable to enter the apertures of the book, then an operating handle A while continuing its forward throw causes the shaft C to move toward the position shown in broken lines in Fig. 11, such that members 29 rotate about their book engaging ends and thus cause a translatory movement to be imparted to a member 260, Fig. 1, secured to the shaft C. During this movement the member 260 will close a switch 261 which through a solenoid 262 renders the wire feeding means inoperative.