Apparatus for heat shrinking wrapping using electrical air heati

Details Apparatus for heat shrinking wrapping using electrical air heati Apparatus for heat shrinking wrapping using electrical air heati

1990-03-12

1992-05-05

Reynolds, Bruce A.

Electric resistance heating devices

Heating devices

Concentrated heated air stream

219400, 34215, 53557, B29C 6102, B65B 5306

Patent

active

051115280

ABSTRACT:
A shrinking frame for foil wrap or hoods to be shrink wrapped on a stack of goods has a shaft-like configuration of the path for producing hot air within the limbs of the frame between the inlet opening and an outlet slit. The resistance heating rods are located in at least one and preferably both of the segments of the U-shaped flow passage.

REFERENCES:
patent: 1679841 (1928-08-01), Shaw
patent: 3662512 (1972-05-01), Zelnick
patent: 3668817 (1972-06-01), Bell
patent: 3711961 (1973-01-01), Spiegel et al.
patent: 3777446 (1973-12-01), Graver
patent: 3896288 (1975-07-01), Tulkoff
patent: 3912903 (1975-10-01), Northrup, Jr. et al.
patent: 4066866 (1978-01-01), Fresnel
patent: 4337390 (1982-06-01), Best
patent: 4451233 (1984-05-01), Lachenmeier et al.
patent: 4536642 (1985-08-01), Hamster et al.

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