Band feeding and tightening apparatus in strapping machine

Details Band feeding and tightening apparatus in strapping machine Band feeding and tightening apparatus in strapping machine

1988-09-07

1990-08-28

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Automatic and/or material-triggered control

100 32, 100 33PB, 156495, B65C 1304

Patent

active

049522701

ABSTRACT:
The present invention relates to a band feeding and tightening apparatus within a strapping machine wherein an external force tending to cause jamming by means of friction and the like in feeding the band pivotably rotates a chute guide constituting part of a band passage, whereby the rear end portion of the chute guide is pushed upwardly and the band which is loosened by means of a length corresponding to the height of the pushed-up portion of the chute guide is retained within the band passage, so that the external force is momentarily released and the band is smoothly fed to the outside of the main body by means of a continuously rotating feed roller and an upper roller without causing jamming and distortion of the band.
The feed roller is driven by means of a series motor and the band is fed at a high rate of speed and a low torque, and then restored so as to perform a primary tightening operation, and finally closely tightened around an article to be strapped at a low rate of speed and a high torque.
The signal of a sensor for detecting the opening of the chute guide stops the feeding of the band by means of the feed roller whereby unnecessary feeding of the band is avoided.

REFERENCES:
patent: 3004728 (1961-10-01), Ihle
patent: 3229878 (1966-01-01), Hurlbut et al.
patent: 4145963 (1979-03-01), Leslie et al.
patent: 4454808 (1984-06-01), Wehr et al.
patent: 4595433 (1986-06-01), Ford et al.

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