Making intermittent orientation draw tape for bags

Details Making intermittent orientation draw tape for bags Making intermittent orientation draw tape for bags

1985-10-29

1987-03-31

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

264167, 2642884, 2642893, 2642905, 493225, 493338, 493928, B31B 100

Patent

active

046540210

ABSTRACT:
A thermoplastic draw tape for bags is produced by stretching thermoplastic between a first pair of nip rollers running at a relatively slow speed and a second pair of nip rollers running at a higher speed. A rotating cylinder has hot and cool sections spaced around the circumference. The draw tape is heated in intermittent sections which are stretched as they pass through the nip rolls to produce a relatively thin and narrow central portion between end portions which pass over the cool sections of the rotating cylinder.

REFERENCES:
patent: 1675274 (1978-06-01), Miller
patent: 2131336 (1938-09-01), Sullivan
patent: 3029853 (1962-04-01), Piazze
patent: 3069726 (1962-12-01), Adams
patent: 3444682 (1969-05-01), Polacco et al.
patent: 3903961 (1975-09-01), Stanislaw
patent: 4034055 (1977-07-01), Strutzel et al.

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