Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1992-07-14
1994-02-22
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
264157, 264268, 2642711, 493 74, 493 85, 493 87, B29C 4514
Patent
active
052884481
ABSTRACT:
The present invention includes of a method for producing a cross sectionally tetragonal tube package for flowable substances, in particular milk and juices. A carrier material (12) coated with synthetic plastic is cut longitudinally and horizontally through to center (35) and then shaped to form two welds (13,14) which made up the relevant tube (1) of the package. The stepped edge (10) of each web (13,14) serves as the top-end edge (10,16) of the tube (1), the blank (I) of which is separated form the web (13,14) by (at 41) parting it in transverse relationship to their direction of movement (15), the blank being provided with a longitudinal sealing seam for formation of the tube. At the top end of the tube (1), there are formed extensions of oppositely disposed side walls (3,5) and projecting wall panels (8,9) which are folded over into the surface of the top (7), the top (7) being integrally moulded on the free edge (10) of the wall panel ( 8,9) and the adjacent stepped end edge (10).
REFERENCES:
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patent: 3162100 (1964-12-01), Rein et al.
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patent: 4496513 (1985-01-01), Ishikawa et al.
patent: 4604850 (1986-08-01), Reil
patent: 4781012 (1988-11-01), Reil et al.
Davis Robert B.
Tetra Pak Holdings & Finance S.A.
Woo Jay H.
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