Molding fastener elements on folded substrate
First Claim
1. A method for forming a fastener product having multiplicities of fastener elements extending from a strip form base, the method comprising:
- folding a sheet material about a first longitudinal fold line to form a first longitudinal edge portion overlapping only a first adjacent portion of the sheet material, leaving another portion of the sheet material exposed as a primary remainder portion;
continuously introducing the folded sheet material to a gap defined adjacent to a peripheral surface of a rotating mold roll, while introducing moldable resin between the sheet material and the mold roll, such that the resin fills an field of fixed cavities defined in the rotating mold roll to form an field of molded stems bonded to one of the first longitudinal edge portion and the primary remainder portion, while introducing an additional material to the gap, such that the additional material is bonded to the other of the first longitudinal edge portion and the primary remainder portion;
forming engageable heads on the molded stems;
solidifying the resin; and
then stripping the solidified resin from the peripheral surface of the mold roll by pulling the stems from their respective cavities.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for forming a fastener product includes folding a sheet material about a longitudinal fold line to form a longitudinal edge portion overlapping only an adjacent portion of the sheet material, leaving another portion of the sheet material exposed as a remainder portion. The folded sheet material is continuously introduced to a gap adjacent to a surface of a rotating mold roll. Moldable resin is introduced between the sheet material and the mold roll to fill fixed cavities in the rotating mold roll to form portions of the fastener elements as stems bonded to one of the overlapping edge portion and the remainder portion. Additional material is bonded to the other of the overlapping edge portion and the remainder portion with the bonding occurring in the gap. The resin is solidified, then, stripped from the surface of the mold roll by pulling the stems from their respective cavities.
92 Citations
20 Claims
-
1. A method for forming a fastener product having multiplicities of fastener elements extending from a strip form base, the method comprising:
-
folding a sheet material about a first longitudinal fold line to form a first longitudinal edge portion overlapping only a first adjacent portion of the sheet material, leaving another portion of the sheet material exposed as a primary remainder portion;
continuously introducing the folded sheet material to a gap defined adjacent to a peripheral surface of a rotating mold roll, while introducing moldable resin between the sheet material and the mold roll, such that the resin fills an field of fixed cavities defined in the rotating mold roll to form an field of molded stems bonded to one of the first longitudinal edge portion and the primary remainder portion, while introducing an additional material to the gap, such that the additional material is bonded to the other of the first longitudinal edge portion and the primary remainder portion;
forming engageable heads on the molded stems;
solidifying the resin; and
thenstripping the solidified resin from the peripheral surface of the mold roll by pulling the stems from their respective cavities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification