Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1986-12-15
1988-03-15
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
264234, 264237, 264251, 264252, 264280, 264285, 425545, 425814, B29D 500
Patent
active
047312122
ABSTRACT:
In a method for continuously manufacturing slide fastener coupling elements, a molded strip of coupling element blanks is folded by a first folder unit about its longitudinal axis while still hot into a U-shaped cross-section to provide a folded strip of coupling element blanks each having a width larger than a predetermined width of each of the coupling elements as ultimately shaped. After having been heated by a hot-air blower, the hot folded strip of blanks is shaped by a second folder unit into slide fastener coupling elements of a finalized shape and dimensions through a plurality of bending stages in which the widths of the coupling element blanks are constricted stepwise by the second folder unit as the folded strip of blanks is fed therethrough.
REFERENCES:
patent: 4257839 (1981-03-01), Yoshida et al.
patent: 4406849 (1983-09-01), Takahashi et al
patent: 4599065 (1986-07-01), Takahashi
Lorin Hubert C.
Silbaugh Jan H.
Yoshida Kogyo K. K.
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