GB1123130A - Device for applying an edge reinforcement, more especially to technical drawings - Google Patents

Abstract

1,123,130. Reinforcing edges of non-metallic sheet material. KALLE A.G. 5 April, 1967 [6 April, 1966], No. 15561/67. Heading B5K. A device for applying an edge reinforcement of heat sealable tape 3a to technical drawings comprises a mounting for a supply reel 3 of tape, a guide rail 4 for directing the tape 3a and a drawing in contact, a pair of nip rollers 5a, 5b for engaging the edge of the drawing and the tape and for moving them and pressing them together, and a heater member having a width at least equal to that of the tape and which is located in front of or at the point of application of pressure by the rollers 5a, 5b. In one embodiment, Fig. 1, for applying an edge reinforcement on one face only, the device comprises a base-plate 1 attachable to a table by a clamp 2. The roller 5b is driven either manually by a crank 6 or by an electric motor. The metal or ceramic roller 5a is driven by friction and heated internally by a spiral element (15), Fig. 4 (not shown). In a modification, Fig. 5 (not shown), the roller 5a is indirectly heated by a heater hood (18) heated by a resistance element (19). The tape 3a may be severed by a knife 7. In a second embodiment, Fig. 2, the tape 3a leaving the horizontal supply reel 3 is guided by pins 9 and folded around the edge of the drawing by a plate 8. The tape and drawing are guided through a slot (12), Fig. 3 (not shown), in a heating slipper 10 comprising a metal block heated either directly by a spiral resistance element or by transference from a separate element. The roller 5b is rotated manually by a crank 6 through a transmission arrangement (not shown). The tape 3a may comprise a polyethylene terephthalate film coated with polyethylene which is heat sealed to the drawing at a temperature of 135-180‹ C. and a pressure of 1-5 kg./cm.<SP>2</SP>