A - Human Necessities – 44 – B
Patent
A - Human Necessities
44
B
24/30, 24/31.6
A44B 18/00 (2006.01) A44B 13/00 (2006.01)
Patent
CA 1122786
ABSTRACT A method for forming strip material adapted to be cut into lengths to provide parts of fasteners is described. The method comprises the following steps: moving two non-fibrous polymeric strips from generally opposite directions around parallel arcuate spaced guides and away from the guides in the same direction along parallel paths; heating the polymeric strips on the spaced guides to soften them; feeding flexible, resilient polymeric monofilaments between the spaced guides from the sides thereof opposite said parallel paths and in a direction generally parallel to said parallel paths; alternately deforming the mono- filaments into a first line of U-shaped portions while pressing the first line of U-shaped portions into engagement with one of the strips and then deforming the monofilaments into another line of U-shaped portions while pressing the other line of U-shaped por- tions into engagement with the other strip to embed and bond the U-shaped portions of the monofilaments in the strips in the positions that they are pressed into engagement therewith so that lengths of the monofilaments between the U-shaped portions extend generally normally between the strips as the strips move along the parallel paths; severing the monofilaments midway between the strips to form two brush-like halves; and heating the newly severed terminal ends of the monofilaments projecting from the strips to form heads having generally hemispherical surfaces opposite the strips.
309202
Minnesota Mining And Manufacturing Company
Smart & Biggar
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