| 摘要 |
1,271,734. Breaking. TEXAS INSTRUMENTS Inc. 23 July, 1969 [5 Sept., 1968], No. 37107/69. Heading B3E. A method of removing from transistor headers 1, by suction forces, pigtails 9a and 11a of wire remaining after wires are stitch bonded to the ends of leads 13 and 15 of the headers comprises placing a bar 23 on a carrier 53 over two rows of headers 1 so that the headers are received in two slots 27. Ribs 29 on opposite sides of the slots bear down on the rims 3 of the headers and clamp them down against the carrier 53. With vacuum applied to a vacuum head 31, the head is reciprocated back and forth in rapid short strokes, starting at one end of the bar 23 and gradually progressing to the other end of the bar. As a result the lower end of each suction port 47, 49 and 51 is repeatedly moved into and out of proximity to the pigtails 9a and 11a which causes repetitive bending of the pigtails at points adjacent the stitch bonds 21. This is continued until the wires become sufficiently work hardened to break off after which they are sucked up and trapped in the head. |
