| 摘要 |
1303164 Seaming non-metallic sheet material EASTMAN KODAK CO 7 May 1970 [12 May 1969] 22064/70 Heading B5K Ultrasonic welding apparatus comprises a movably mounted ultrasonic horn 55, means for rotating a workpiece C to be welded, and a cam mechanism which upon rotation of the workpiece C causes the horn 55 to follow a predetermined path of movement relatively to the workpiece. In apparatus for welding together two parts T, B along a line 43 to form a cassette C, Figs. 1 and 2, the cassette is positioned on a bed plate 27 integral with a rotatable turntable 17 by placing an edge against an arcuate clamp 31 and pushing it outwardly, against the pressure of springs 41 acting on bellcranks 39, until the opposit edge can be moved into position adjacent an abutment plate 33. When the operator releases the pressure, the clamp 31 moves inwardly to hold the cassette. The operator closes a switch to start an electric motor 19 and the horn 55. The motor 19 rotates the turntable 17, a camring 47 fixed to the bedplate 27, and the cassette C. The cam follower system is fixed to a bracket 57 to which the horn 55 is clamped and comprises a wheel 67 and a ball caster 69 to engage the upper and outside surfaces, respectively, of the ring 47. The wheel 67 and the ball 69 are held in contact with the ring 47 by a weight 71 and a spring 77 acting on a lever 73, respectively. When rotation starts, the horn 55 contacts a corner 85 of the top T, welds along the top until it reaches a corner 87. is lifted and descends again at corner 87, and continues welding until it reaches a corner 90. The current is switched off and the operator actuates a lever 91 to cause a plunger 93 to engage a plunger 95 to push the cassette C out of engagement with the clamp 31. An automatic control system, Fig. 3 (not shown), may be provided and includes photoelectric means for preventing energization of the horn in the absence of a workpiece. |
