Device and method for verifying the integrity of product packagi

Details Device and method for verifying the integrity of product packagi Device and method for verifying the integrity of product packagi

1996-09-09

1998-03-03

Coan, James F.

Package making

With means responsive to a sensed condition

Separate delivery of incomplete or defective package

53 76, 53505, 53550, B65B 906, B65B 5702

Patent

active

057222142

ABSTRACT:
In a wrapping machine that packages products by enveloping each one in a tubular wrapper with two edges united lengthwise and heat-sealed thus together, the integrity of the packaging is verified by a device comprising a feeler located at a given point along the wrapping line and offered in sliding contact to the advancing wrapper at an area coinciding with the junction between the edges and the tubular envelope. The feeler is loaded against a spring delivering a force of known intensity, and able consequently to hold a stable operating position as long as resistance is offered by the wrappers, but will find the gaps in any wrapper of which the edges have failed to unite successfully. The resulting movement of the feeler is sensed by a transducer.

REFERENCES:
patent: 2991879 (1961-07-01), Innocenti
patent: 4011155 (1977-03-01), Feurstein et al.
patent: 4984409 (1991-01-01), Focke
patent: 5412926 (1995-05-01), Focke

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