Package making – Methods – Sterilizing cover only
Patent
1991-11-25
1993-08-24
Coan, James F.
Package making
Methods
Sterilizing cover only
53455, 493198, B31B 3900, B65B 908
Patent
active
052377997
ABSTRACT:
A continuous band of containers containing two rows of containers with each row joined to an opposite edge of an elongated joining strip, is produced by positioning a flattened elongated tube of plastic heat sealable material so that it is centered with respect to the longitudinal center-line of an elongated reinforcing sheet. The width of the flattened tube equals twice the height (H) of each container plus the width "d" of the joining strip. The longitudinal edge portions of the reinforcing sheet are folded inwardly over the longitudinal edges of the flattened tube to be separated by distance "d". Aligned transverse welds, each of length H, are then made to extend inwardly from opposite longitudinal edges of the flattened tube and weld two layers of the folded tube together with two layers of the reinforcing sheet. Each pair of aligned welds is spaced from the next pair of aligned welds by distance "L" equal to the container width. The transverse welds are then perforated along their longitudinal center-lines and thereafter the exposed upper layer of the flattened tube is slit longitudinally to form a strip of width "d" that is removed to provide oppositely facing openings through which the containers are filled. After the containers are filled, the filling openings are sealed, the joining strip and the tube layer secured thereto are removed, and the filled and closed containers are separated from each other by tearing along the perforations through the transverse welds.
REFERENCES:
patent: 3194124 (1965-07-01), Warp
patent: 3552278 (1971-01-01), Guenther
patent: 3743567 (1973-07-01), Abler
patent: 4945713 (1990-08-01), Widenback
Coan James F.
Crescent Holding
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