Method of making a multiple chamber tube

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article

Reexamination Certificate

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Details

C264S250000, C264S255000

Reexamination Certificate

active

06994818

ABSTRACT:
The invention relates to a multi-chamber tube with at least two chambers and a tube head, with closable withdrawal apertures corresponding to the number of chambers and consisting of an accumulation of at least two separately produced tubular pipes arranged parallel to one another with a rounded external periphery common to all tubular pipes. According to the invention it comprises an integral tube head produced by pressed molten portions and common to all tubular pipes and containing the partition walls corresponding to the number of tubular pipes and connected thereto, molten material simultaneously flowing around the edge ends of the tubular members which are rigidly connected to one another after curing.

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patent: 5102016 (1992-04-01), Ball et al.
patent: 5154917 (1992-10-01), Ibrahim et al.
patent: 5219373 (1993-06-01), Hatakeyama et al.
patent: 5823391 (1998-10-01), Klauke et al.
patent: 5865345 (1999-02-01), Cistone et al.
patent: 5954231 (1999-09-01), Durliat et al.
patent: 6227837 (2001-05-01), Keller et al.
patent: 195 47 957 (1997-07-01), None
patent: 199 11 728 (2000-09-01), None
patent: 1 010 643 (2000-06-01), None
patent: WO 94 19251 (1994-09-01), None

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