Apparatus for the shrinking of wrapping foils

Details Apparatus for the shrinking of wrapping foils Apparatus for the shrinking of wrapping foils

1980-03-19

1982-05-18

Yuen, Henry C.

Heating

Inserted emitter type of hollow article interior heater

432225, 53557, 34225, F23D 1312, F24J 300

Patent

active

043302653

ABSTRACT:
The invention relates to apparatus for the shrinking of foil, which is wrapped around an article, and comprises a frame 1, which along its inner edge is provided with a means of heating. The apparatus is characterized by the frame 1 being hollow, that there are means for blowing air into the hollow part, and means in the form of slots or ports 27 and 28 for leading the air out along the inner edge of the frame 1 close to the means of heating. The means of heating can, for example, consist of gas burners 20 or electric heating elements. The frame 1 can be arranged to move up and down around the article around which the foil is to be shrunk.

REFERENCES:
patent: 1956519 (1934-04-01), Thomson
patent: 3222800 (1965-12-01), Siegel et al.
patent: 3316653 (1967-05-01), Zelnick
patent: 3616548 (1967-04-01), Nichols
patent: 3711957 (1973-01-01), Canver, Jr.
patent: 3833338 (1974-09-01), Badrock
patent: 3963417 (1976-06-01), Placek
patent: 4006732 (1977-02-01), Schumm
patent: 4182095 (1980-01-01), Day

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