Drafting board with replaceable surface layer

Horizontally supported planar surfaces – With peripheral guard

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Details

108 90, 52783, A47B 1700

Patent

active

047168404

ABSTRACT:
A drafting board having a planar top surface with a peripheral depression. A thin, resilient, cover sheet is removably secured to the top surface by a pressure-sensitive adhesive and extends into the peripheral depression where it is retained by a peripheral retaining rim extending about the panel below the plane of the working surface. The parts are structurally related so that the cover sheet slopes gradually downwardly into the depression without lifting or bulging along the outer limits of the panel's top surface. Replacement of the cover sheet is achieved by removing the retaining rim, stripping away the old cover sheet, adhesively securing a replacement cover sheet, and securing its border within the depression by re-mounting the retaining rim.

REFERENCES:
patent: 1207460 (1916-12-01), Bindel
patent: 1496581 (1924-06-01), Kusterle
patent: 2228504 (1941-01-01), Braun
patent: 2251395 (1941-08-01), Campbell
patent: 2793090 (1957-05-01), Wolters
patent: 2843889 (1958-07-01), Keller
patent: 2853750 (1958-09-01), Davies et al.
patent: 2957737 (1960-10-01), Irwin et al.
patent: 3389520 (1968-06-01), Gray et al.
patent: 3554140 (1971-01-01), Homesberger
patent: 4625491 (1986-12-01), Gibson

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