Patent GB-782695-A (GB)
Title: Improvements in or relating to devices suitable for uniting strip material
IPC: A43D43/06
Filed: 1954-12-09
Abstract: 782,695. Feeding webs. BRITISH UNITED SHOE MACHINERY CO., Ltd., LUTYENS, J. L., and JAMES C. H. Dec. 7, 1955 [Dec. 9, 1954], No. 35629/54. Class 100(1) A web splicing device has means for supporting at their adjacent ends two webs to be spliced together, whereby after severing, e.g. obliquely, the adjacent ends to provide trimmed-off abutting end portions, the ends remain supported during the application of a single overlying piece of strip material which extends from one side of the line of severing to the other. As shown, tapes A and B, Fig. 4 coated on at least one side with pressure responsive cement are spliced by the attachment of a patch C cut from a ribbon D coated on both sides with pressure responsive cement. The tapes A and B are supported on a movable table 10, Fig. 6, and a fixed table 6 respectively. The movable table 10 is pivoted to a pin 12 and urged upwardly by a compression spring 14, such that a lug on the table 10 engages the table 6. The table 10 is locked in its upward position by a bolt 22, Figs. 4 and 9, slidable in a guide 26. A knife 34, for severing the ribbon is secured to a three-arm lever 38 actuated against the action of a spring 44 by a treadle-operated rod 40. The knife 34 co-operates with edges 30 and 32 to cut the ribbon D. A tape knife 52, co-operating with an oblique shearing edge 8, effects cutting of the tapes A and B in succession. The knife 52 is fixed to an arm 54 having a sleeve 56 rotatably mounted on a pin 58 perpendicular to the edge 8; and arm 62, integral with the sleeve 56, is connected to a rod 64 actuated by a treadle, not shown. The rod 64 is normally held in raised position by a spring 66. The sleeve 56 has a pin 68 engaging a recess 70, Fig. 9, in the bolt 22, such that depression of the arm 54 effects withdrawal of the bolt 22 to permit downward movement of the table 10. A clamping member 76, Figs. 4 and 9, comprises a thin leaf spring 80 secured to a block 82, Fig. 4, rotatable on a pin 84. A thick leaf spring 83 presses on a central portion of the member 76, such that the member 76 seats firmly on the tape A. A pawl 90, Fig. 8, pivotally mounted on a pin 92 is urged by a spring 94 into engagement with a face 96 on the block 82 to hold the clamping member 76, Fig. 9, in operative downward position. A second clamping member 98, Fig. 4, has a thin leaf spring 102 secured to a block 104 rotatable on the pin 84 and a thick leaf spring 105 to press the clamping member 98 into engagement with the tape B on the table 6. A spring 106, Fig. 9, secured to the block 104 urges the second clamping member into an inoperative position where it is retained by a pawl 110 engaging a face 114. The pawl 90 has a handle 116 and a pin 118 which engages a slot 120 in the pawl 110, thus the pawls 90 and 110 may engage the faces 96 and 114. Fig. 8, independently, but may be released simultaneously by depressing the handle 116. A pin 122 engaging a recess 124 in the block 104 limits relative movement of the first clamp to the second clamp. A pawl 126, rotatable on a pin 128 fixed in the arm 54, engages a pin 130, fixed in the block 82, to actuate the clamping member 76, Fig. 4. A pawl 136, Fig. 8, rotatably mounted on the pin 128 engages a pin 138 fixed in the block 104 to actuate the second clamping member 98. When the arm 54 rises under the action of the spring 66, Fig. 4, the pawl 136 moves rearwardly until a cam face 142 Fig. 9, on the pawl 136 engages a cam face 144 on a frame 2, thereby lifting the pawl into inoperative position. In operation, the treadle, not shown, actuating the rod 64 is depressed to move the knife 52 and the first clamping member 76 downwards, the clamping member 98 remaining stationary, since the pawl 136 is inoperative due to the cam face 144. As the knife 52, Fig. 4, approaches the edge 8, the bolt 22 is withdrawn and the pin 122, Fig. 8, imparts a downward movement to the clamping member 98, Fig. 9, to release the pawl 136 for engagement with the pin 138. The knife 52 cuts the tape A, clamped by the member 76, obliquely on the edge 8, while the pawl 90 locks the member 76 in operative position. A second depression of the treadle, not shown, which actuates the rod 64, causes the knife 25 to cut the tape B obliquely along the same line as the tape A was previously severed and actuation of the clamping member 98. The clamping member 98 is retained in operative position by the pawl 110. A length of ribbon D is then placed on the adhesive upper faces of the tapes A and B, such that the abutting ends of the tapes divide the overlapping portion of the ribbon into two halves. The applied patch C is then severed from the ribbon by the knife 34 and the handle 116 is depressed to release the spliced tape which is fed into the machine not shown.. Specification 642,964 is referred to.