Sealing wheel for forming fin seal package

Details Sealing wheel for forming fin seal package Sealing wheel for forming fin seal package

1979-12-26

1982-08-31

Sipos, John

Package making

Wrapping machines

Cover-wiping passage or pocket for initial wrap

53373, B65B 1128

Patent

active

043465455

ABSTRACT:
A sealing wheel having a plurality of radially outwardly opening pockets is rotatably indexed through loading and discharging positions. Each pocket, formed by a pair of stationary jaws, receives an article and its wrapper at the loading position and forms the wrapper to a U-fold about the article. Movable heat sealing jaws associated with each pair of stationary jaws have U-shaped sealing surfaces which engage marginal portions of the wrapper outwardly of the stationary jaws to form a U-shaped fin seal around three sides of the package, a fourth side being formed by the wrapper fold. A jaw opening mechanism opens each set of sealing jaws as it approaches the discharging position, where the wrapped and sealed package is ejected. The jaw opening mechanism is also arranged to simultaneously open all jaws in closed position in response to a predetermined condition, such as machine shut-down.

REFERENCES:
patent: 1352221 (1920-09-01), Reifsnyder
patent: 1946697 (1934-02-01), Johnson
patent: 3271923 (1966-09-01), Fullbrook
patent: 3418785 (1968-12-01), Duryee
patent: 3448558 (1969-06-01), Hurtle
patent: 3987605 (1976-10-01), Johnson
patent: 4020608 (1977-05-01), Seragnoli
patent: 4073123 (1978-02-01), Schoppee
patent: 4228884 (1980-10-01), Michels

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