Apparatus for applying plastic sleeves to glass bottles

Details Apparatus for applying plastic sleeves to glass bottles Apparatus for applying plastic sleeves to glass bottles

1978-11-16

1980-04-29

Jones, Jr., James L.

Metal working

Means to assemble or disassemble

To apply or remove a resilient article

156218, 156294, B23P 1902

Patent

active

041998510

ABSTRACT:
The present invention relates to an apparatus for applying a plastic sleeve to a rigid base article, such as a glass bottle. A blank of plastic is wrapped around a mandrel and seamed to form a plastic sleeve. The bottle to which the sleeve is to be applied is preheated and longitudinally aligned over the mandrel. A pressurized fluid is introduced between the plastic sleeve and the mandrel to form a fluid cushion upon which the plastic sleeve can slide without binding or wrinkling. As the pressurized fluid is introduced, a stripper sleeve is actuated to engage the lower edge of the plastic sleeve and block the passage of the pressurized fluid therefrom. Thus, the plastic sleeve is inflated slightly about the mandrel. Then the stripper sleeve is moved upwardly to telescope the plastic sleeve onto the aligned bottle. A gasket is secured to the upper base of the mandrel, upon which the bottle rests during the transfer operation. The gasket tends to direct the flow of the pressurized fluid toward the sleeve and away from the gap between the mandrel and the inwardly curving lower end of the bottle. Also, additional pressurized fluid is introduced through apertures formed in the upper base of the mandrel to prevent the plastic sleeve from collapsing. When the stripper sleeve is fully extended and the plastic sleeve covers the bottle, the heat of the bottle causes the plastic sleeve to shrink slightly such that it is held in position relative to the bottle until it is subjected to a final thermoconstrictive operation.

REFERENCES:
patent: 3551258 (1970-12-01), Galvanoni et al.
patent: 3611536 (1971-10-01), Guenther et al.
patent: 3624892 (1971-12-01), Monteiro
patent: 3802942 (1974-04-01), Amberg et al.

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