Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1988-02-22
1989-04-11
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493193, 493208, 493225, 493393, 493394, 493471, 493474, 493475, 156582, 1565831, 29125, B31B 164, B31B 2386
Patent
active
048202495
ABSTRACT:
A draw tape bag apparatus passes a web of plastic material having edge notched hems in the opposite edges to receive closing tapes. A hem sealer unit seals the folded layers of the web longitudinally of the folded edge to form the hem. The sealer unit includes a drum unit rotatably mounted on a shaft. The drum unit includes first and second drum parts having coaxial peripheral surfaces. A heat concentrating and release tape is secured to each drum part. The adjacent intermediate ends of the drum parts have telescoping and mating fingers and receses. Separate adjustment screws are coupled to the machine frame adjacent each drum part. Each screw is coupled to the outer race of a ball bearing secured to the adjacent outer end wall of the drum part. The setting of the screw accurately locates the heat concentrating tape axially of the drum. Hot air nozzles are mounted externally to the drum parts in alignment with the tapes and heat the web passing over the tapes to heat seal the web layers in the hem.
REFERENCES:
patent: 3644163 (1972-02-01), Schwarzkopf et al.
patent: 3752042 (1973-08-01), Castille
patent: 4030960 (1977-06-01), Pratt
patent: 4037769 (1977-07-01), Meyers
patent: 4099487 (1978-07-01), Wouters
patent: 4213031 (1980-07-01), Farber
patent: 4308087 (1981-12-01), Johnson
patent: 4380446 (1983-04-01), Dickson et al.
patent: 4397072 (1983-08-01), Otthofer
patent: 4478672 (1984-10-01), Precht
patent: 4664649 (1987-05-01), Johnson et al.
patent: 4721502 (1988-01-01), Herrington
Amplas, Inc.
Schmidt Frederick R.
Terrell William E.
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