Title: Heat welded joints between webs of reinforced plastic foil

Abstract: The invention refers to heat weld joints of the type used for adjoining webs of reinforced plastic foil intended for use as stretched ceiling covers. The invention consists in the provision of means at intervals along the heat weld joints for reinforcing same to withstand the influence of heat. The invention also covers a process for the preparation of such reinforced heat weld joints.

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Inventors: Wallin, Erik Wilhelm (Gamleby, SW)

Application Number: 430406
Filing Date: 1974-01-03
Publication_date: 1977-03-01
Assignee: Barracudaverken Aktiebolag (Djursholm, SW)
Primary Class(es): 428/61 52/222, 156/71, 156/92, 428/99, 428/104, 428/121
Other Classes:
US Patent Ref:

1560712	Nov, 1925	Naylor	161/50.
2031098	Feb, 1936	Cerf et al.	161/50.
2115368	Apr, 1938	Lustberg	161/50.
2624886	Jan, 1953	Herman	161/50.
2683679	Jul, 1954	Hurd et al.	428/57.
2974566	Mar, 1961	Hurley	156/92.
3199481	Aug, 1965	Handwerker	161/50.
3420731	Jan, 1969	Kuhn	428/104.
3424161	Jan, 1969	Scheier	161/50.
3441467	Apr, 1969	Odell	428/121.
3459149	Aug, 1969	Hallmark	161/50.
3615966	Oct, 1971	Ljungbo	52/222.

Other Refs:
Primary Examiner: Dier, Philip
Assistant Examiner:
Attorney: Toren, McGeady and Stanger