Patent GB-1100729-A (GB)
Title: Button stitching machine and method of stitching
IPC: D05B73/12
Filed: 1965-03-23
Abstract: 1,100,729. Feeding buttons. AMERICAN MACHINE & FOUNDRY CO. 23 March, 1965 [3 April, 1964], No. 12289/66. Heading B8S. [Also in Division D1] Shank buttons B are fed in succession by an inclined shoot C to spring button-retaining fingers 124 on a pivoted body 102, which swings to transfer a held button to the button chuck 200 of a button sewing machine. The buttons pass from a hopper H to the shoot C, the heads abutting a back-plate 10 and the shanks S being guided by a slot constituted by a gap between two front plates 12, the slot being horizontal at the bottom of the shoot. A bracket 24 on the shoot is rigid with a shaft 26 journalled in an arm 28 projecting from hopper H. An arm 32, rigid with shaft 26, carries a roller 34 biased into engagement with a cam lug 36 by a spring 50 acting on the shoot. Lug 36 is rigid with a lever 38 pivoted at one end to a crank arm 40 on a shaft 42, and slidable at its other end on a fixed pin 44. A body 67, pivoted to the lower end of shoot C and biased by a spring 92 against a stop thereon, comprises a rearwardly-projecting cam arm 66, a buttonretaining member 68 engaging the head of the lowermost or end button, and an arm 70. An arm 74, pivoted to the lower end of shoot C, is spring-biased to engage a roller thereon with arm 70, and operatively holds a pivoted catch 94 in engagement with the bottom of the end button. Body 102, pivoted on vertical pins 104, houses a non-rotatable plunger 112 which is spring-biased rearwardly, and which carries on its front end a head 120 provided with the spring fingers 124, Body 102 is biased by a spring 134 anti-clockwise against a fixed stud 136 to align plunger 112 with the lowermost button. An arm 140, pivoted on a pin 104 and disposed within a recess 138 in body 102, is pivoted to one end of a rod 142, the other end of which is slidable in a body 144, a compression spring 148 being interposed between body 144 and a shoulder on rod 142. A bar 145, rigid with body 144, is also rigid with a crank arm 146 on shaft 42. Arm 146 is biased by a spring 150 against a stud 152 rigid with a lever 154 carrying a roller 158. A spring 164, stronger than spring 150, acts on lever 154 to engage roller 158 with a cam 160 on a driven shaft 162. The arrangement is such that when a high part of cam 160 engages roller 158, lever 154 turns rearwardly thus allowing the consequent rearward movement of arm 146 to turn shaft 42 in the direction 175. Roller 34 thereby shifts to the low position of cam lug 36, whereby spring 50 moves shoot C in the direction 165. During the initial part of this movement, arm 66 engages a roller 132 carried by body 102 to rock body 67, whereby member 68 is disengaged from the end button, and arm 70 rocks arm 74 to disengage catch 94 from the end button. A lug (82) on arm 74 also engages the shank of the second button to shift the latter slightly away from the end button and to hold the second button. During further movement of shoot C in direction 165, the fingers 124 seize and retain the end button. When roller 158 re-engages the low portion of ram 160, cam lug 36 co-operates with roller 34 to restore shoot C to its initial position.