Method of extrusion blow molding into paperboard inserts to form

Details Method of extrusion blow molding into paperboard inserts to form Method of extrusion blow molding into paperboard inserts to form

1991-07-30

1992-12-08

Silbaugh, Jan H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624449, 15624422, 156245, 156250, 156251, 156264, 156287, 264511, 264515, 264516, 264152, 264159, 264161, 264163, 425503, B29C 4904, B29C 4920, B29C 4922, B29C 4972

Patent

active

051694700

ABSTRACT:
The vessel portion of a gas-tight container suitable for packaging fresh foods is produced as a composite of paperboard and polymer film. A pair of folded paperboard blanks, pre-cut and pre-formed, are inserted into the opposite halves of split mold elements to a blow molding machine. Vacuum orifices in each mold half unit temporarily secure the position of a respective paperboard blank. The paperboard lined mold halves are closed upon a hot, extruded parison of malleable polymer leaving an end portion of the parison tube projecting from the closed mold unit. A fluid conducting needle penetrates this projected end portion to inflate the parison with an apppropriate blowing gas. Such inflation expands the malleable polymer, seamlessly and creaselessly, into the internal corners and crevices of the folded paperboard blanks. Following chilling, the mold unit is opened and the pair of paperboard blanks are ejected as a singular unit, joined by a molded flange of the continuous polymer film. Finally, the two polymer coated paperboard vessels are separated by trimming about the flange.

REFERENCES:
patent: 2285150 (1942-06-01), Ferngren
patent: 3324214 (1967-06-01), Schaich
patent: 3328498 (1967-06-01), Cheney
patent: 3764250 (1973-10-01), Waterloo
patent: 3807928 (1974-04-01), Horberg, Jr. et al.
patent: 3816046 (1974-06-01), Farrell
patent: 3892828 (1975-07-01), Weatherly
patent: 3947176 (1976-03-01), Rainville
patent: 3985485 (1976-10-01), Farrell
patent: 4026458 (1977-05-01), Morris et al.
patent: 4070429 (1978-01-01), Uhlig
patent: 4337116 (1982-06-01), Foster et al.
patent: 4397625 (1983-08-01), Hellmer et al.
patent: 4479644 (1984-10-01), Bartimes et al.
patent: 4515648 (1985-05-01), Kolbe et al.
patent: 4582664 (1986-04-01), Clark
patent: 4662978 (1987-05-01), Oki
patent: 4729731 (1988-03-01), Hasl et al.
patent: 4767482 (1988-08-01), Diez et al.
patent: 4796766 (1989-01-01), Clark
patent: 4824504 (1989-04-01), Kagata
patent: 4840366 (1989-06-01), Johnston et al.
patent: 4844330 (1989-07-01), Roosa et al.
patent: 5049349 (1991-09-01), McCullough et al.

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