Positive sealing assembly for hand operated strapping tool

Details Positive sealing assembly for hand operated strapping tool Positive sealing assembly for hand operated strapping tool

1979-09-24

1981-09-15

Lazarus, Richard B.

Wireworking

Applying wire

Binder tightening and joining implements

B21F 902

Patent

active

042891744

ABSTRACT:
A strapping tool of the type which crimps or notches a seal around overlapping strap ends extending in opposite directions in a tensioned strap loop around an article being tied. The tool has a frame, a sealer jaw assembly mounted for at least opening and closing movement about the seal and an actuator therefor. The actuator includes a member adapted to be rotated about an axis in a first direction to a predetermined angle to fully close the jaw assembly and adapted to be rotated about the axis in a second, opposite direction to open the jaw assembly. A pawl is mounted on the frame for pivoting in the first and second directions and is biased against rotation in both directions to an initial, unengaged position when the jaw assembly is both fully closed and fully opened. An engaging means is connected to the actuating member and positioned for pivoting the pawl in the second direction when the actuating member is rotated in the first direction to close the jaw assembly and for engaging the pawl in a position pivoted from its initial position to prevent rotation of the actuating member in the second direction until the actuating member has been rotated in the first direction through the predetermined angle to carry the engaging means past the pawl.

REFERENCES:
patent: 3039336 (1962-06-01), Kobiella
patent: 3322008 (1967-05-01), Filia
patent: 3360017 (1967-12-01), Vilcins
patent: 3572398 (1971-03-01), Sansum
patent: 3769859 (1973-11-01), Sykes
patent: 4015643 (1977-04-01), Cheung

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