Apparatus for fabricating drip irrigation tape

Details Apparatus for fabricating drip irrigation tape Apparatus for fabricating drip irrigation tape

1985-03-01

1988-02-02

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156218, 15624415, 15624425, 156466, 239542, 239547, B29D 2300

Patent

active

047227591

ABSTRACT:
An apparatus is disclosed for fabricating drip irrigation tape from a water impervious polyethelene film. A shaping assembly with a water-cooled vacuum drum preforms a groove along one edge, a folding device folds the strip lengthwise to form a first conduit, and a sealing assembly with an electrically-heated heat sealing wheel joins the edges along opposite sides of the groove to form a seam in which the groove defines a secondary conduit that is resistant to deformation. Flat spots on a pair of outwardly-extending annular ribs around the circumference of the heat sealing wheel produce breaks in the seam for inlet ports and outlet ports.

REFERENCES:
patent: 4173309 (1979-11-01), Drori
patent: 4413787 (1983-11-01), Gilead et al.
patent: 4473191 (1984-09-01), Chapin

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