Support roller scrapers for wallboard mastic applying apparatus

Details Support roller scrapers for wallboard mastic applying apparatus Support roller scrapers for wallboard mastic applying apparatus

1978-09-21

1980-01-29

Tillman, Murray

Plastic article or earthenware shaping or treating: apparatus

Hand movable, substrate traversing, plural dimension shaping...

264 39, 425225, 425232, B28B 1900

Patent

active

041859502

ABSTRACT:
Plaster board mastic applying apparatus comprising a mastic reservoir or casing adapted to be moved along the board having a mastic delivery slot adjacent its trailing end, a trowelling bar disposed rearwardly adjacent thereof, a slideable support at each end of the bar, and a pivoted axis at the leading end of the casing with a roller on each end thereof, the slideable supports and rollers contacting the board to cause the bar to trowel the mastic into a uniform and smooth layer, the uniformity of such layer being interrupted when mastic accumulates on the rollers, and means for periodically removing the accumulation to thereby resume the uniformity of the layer, said means comprising a scraper for each roller secured to the casing in spaced relation thereto during its normal use and engageable therewith during non-use by manually moving the axle about its pivot and rotating a roller by the hand of the operator.

REFERENCES:
patent: Re24161 (1955-03-01), Rogge et al.
patent: 181832 (1876-09-01), Galt et al.
patent: 2824442 (1958-02-01), Ames
patent: 2856767 (1958-10-01), Searl
patent: 2965926 (1960-12-01), von Haase
patent: 2984857 (1961-05-01), Ames
patent: 3804569 (1974-04-01), Walker
patent: 3932101 (1976-01-01), Johnson
patent: 3975475 (1976-08-01), Foley

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