Shrinking tunnel

Details Shrinking tunnel Shrinking tunnel

1984-09-28

1986-07-01

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

Houses, kilns, and containers

34225, 34231, F26B 906

Patent

active

045971935

ABSTRACT:
A shrinkage tunnel (11) for heat treatment of shrinkable films has a hot air unit, which can be inserted as a standard unit in a tunnel wall and contains a radial fan (22), which is surrounded by a fan casing (26) formed from two sheet metal half-shells (27, 28). Between them they form a ring nozzle (30) with an axial outflow direction with respect to fan shaft (25), while air return flow opening (32) is centrally and directly positioned below the fan wheel (22). The heating system is integrated into the fan casing, so that the complete hot air unit (20) is an independently functional and preassemblable component.

REFERENCES:
patent: 3389478 (1968-06-01), Cline
patent: 3430358 (1969-03-01), Denker
patent: 3621588 (1971-11-01), Grocke
patent: 3668817 (1972-06-01), Bell
patent: 3777446 (1973-12-01), Graver
patent: 4426793 (1984-01-01), Kuboyama

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