Method and apparatus for manufacture of a light-proof and folded

Details Method and apparatus for manufacture of a light-proof and folded Method and apparatus for manufacture of a light-proof and folded

1991-02-01

1992-06-09

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 91, 156204, 156227, 1562722, 1563798, 156459, 156469, 156474, 156539, 156543, 1565801, 428181, B32B 3104, B32B 3128

Patent

active

051203766

ABSTRACT:
The method and the apparatus for manufacture of a light-proof and folded window curtain are disclosed. A plane curtain material is folded repeatedly into a plurality of folded parts of an equal width, which are subsequently joined together on the same side of the curtain to form close-knit shoulders through which the curtain holes are arranged at a predetermined position for accommodating a string. A positioning apparatus is employed to hold firmly the groove portions of the folded curtain material, so as to permit two adjacent folded parts to stay closely together. An adapting apparatus is subsequently used to form a shoulder of a predetermined width from two adjoining folded parts. A series of shoulders are formed from a plurality of groups with each containing two adjoining folded parts on the same side of the folded curtain material.

REFERENCES:
patent: 4861404 (1989-08-01), Neff
patent: 4974656 (1990-12-01), Judkins

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