Machine for sealing parallelepipedal boxes having a variable hei

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control

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Details

156360, 156468, G05G 1500

Patent

active

040604420

ABSTRACT:
A box-sealing machine in which prismatic boxes to be sealed by a sticking tape are caused to advance on a conveying horizontal path to arrive beneath a sealing head which applies a sticker to the two folded down top flaps of the box to seal the latter, the sealing head dropping onto the box wall to effect sealing and being lifted as sealing is completed, to repeat the operation for each box being presented to the sealing head in succession, the improvement consisting in that a cutoff valve is provided in the fluid-operated circuit which lifts and depresses the sealing head so as to stop the descending movement of the sealing head on the box when a preselected pressure is attained in said fluid-operated control circuitry. The boxes are not damaged by the weight of the sealing head insisting thereon during progress of the sealing operation proper, and exceedingly long up and down strokes of the sealing head are avoided when comparatively tall boxes are to be sealed.

REFERENCES:
patent: 3075356 (1963-01-01), Fiala et al.
patent: 3309852 (1967-03-01), Allen
patent: 3419038 (1968-12-01), Andresen
patent: 3466843 (1969-09-01), Mumder
patent: 3505774 (1970-04-01), Gidge

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