Tensioning apparatus and methods for plastic packaging

Details Tensioning apparatus and methods for plastic packaging Tensioning apparatus and methods for plastic packaging

1986-08-11

1988-02-09

Coan, James F.

Package making

Closing packages and filled receptacles

Including provision for pleat of cover overhang

53373, 493406, B65B 702

Patent

active

047233907

ABSTRACT:
A method and apparatus for tensioning or drawing taut a plastic bag or packaging around a product prior to sealing is disclosed. The apparatus operates in combination with presently available conveying means and packaging sealing means. The apparatus includes a housing to support and contain a pair of conical brushes having rotational axes parallel to the direction of travel of the conveyor belt. The conical brushes rotate in opposite directions so as to draw excess packaging material into the nip formed by the tip of the brushes to smooth away wrinkles and/or folds. A transport and gripping belt then closes the bag and moves it past a pair of cylindrical shaped brushes which may be on the same shaft as the conical brushes. The cylindrical brushes draw the packaging material tight or taut around the product in a manner suitable for sealing. Drive motors for the transport belt and the rotating brushes include means for varying the respective speeds such that various products and packaging materials can be handled.

REFERENCES:
patent: 3163969 (1965-01-01), Irwin et al.
patent: 3420034 (1969-01-01), Saraisky et al.
patent: 3471990 (1969-10-01), Bonuchi et al.
patent: 3552088 (1971-01-01), Niwa
patent: 3621632 (1971-11-01), Browning

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