Package making – Closing packages and filled receptacles – By means adapted to engage outturned seam of package cover
Patent
1975-08-12
1976-06-01
Spruill, Robert L.
Package making
Closing packages and filled receptacles
By means adapted to engage outturned seam of package cover
53180R, B65B 906, B65B 5126
Patent
active
039599523
ABSTRACT:
A packaging apparatus using a hose-shaped wrapper has a table on which the wrapper of indefinite length is advanced in the direction of its length. The wrapper contains uniformly spaced groups of articles to be packaged. The apparatus further has cooperating rotating welding shoes disposed in the path of travel of the wrapper for transversely bonding together wall portions of the wrapper between two article groups and endless chains formed of links and disposed above the table at both sides of the travelling path of the wrapper. Each chain has a chain portion extending adjacent and parallel to the travelling path of the wrapper along a length portion positioned upstream of the welding shoes as viewed in the direction of wrapper feed. A plurality of pressing members are secured to the chains at a predetermined distance; each pressing member on one chain cooperates with a pressing member on the other chain for pinching together the wrapper and supporting it laterally as it is fed through the welding shoes. Each pressing member includes a leading pressing finger and a trailing pressing finger, both affixed to a common unitary holder which, in turn, is pivotally secured to two successive chain joints. The leading pressing finger projects from the leading chain joint, which supports the associated holder to such an extent in the direction of wrapper feed as admitted by the distance between the chain-supporting sprocket closest to the welding shoes and the travelling path of the welding shoes.
REFERENCES:
patent: 3402524 (1968-09-01), Griner
S I G Schweizerische Industrie-Gesellschaft
Spruill Robert L.
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