Device for heating the internal surface of the open end of plast

Details Device for heating the internal surface of the open end of plast Device for heating the internal surface of the open end of plast

1995-02-08

1998-07-28

Hoang, Tu B.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219243, 219535, 1563084, H05B 306

Patent

active

057865728

ABSTRACT:
Device for heating the internal surface of the open end of plastic tubular containers, consisting of a heating head (1) which has a cross-section corresponding to the shape of the tubular container and can be coaxially inserted so as to make contact, inside the open end of the tubular container (3) itself, along a section corresponding to the section (3a) to be softened internally, a heating head (1) being provided internally with electrical heating resistances (2), there also being provided a device (3) for pressing the tube against the heating head (1) during heating so that the heat is transmitted to the internal surface of the container of direct-contact conduction.

REFERENCES:
patent: 2715087 (1955-08-01), Barradas
patent: 2926474 (1960-03-01), Morrison
patent: 3140571 (1964-07-01), Dorper et al.
patent: 3691267 (1972-09-01), Takehara
patent: 3765144 (1973-10-01), Schiesser
patent: 4394204 (1983-07-01), Hutcheson
patent: 4511426 (1985-04-01), Linner
patent: 4596110 (1986-06-01), Weiler
patent: 4671763 (1987-06-01), Weiler

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