Air eraser

Details Air eraser Air eraser

1975-12-01

1978-05-23

Smith, Gary L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51436, 51438, B24C 502, B24C 504, B24C 700

Patent

active

040903346

ABSTRACT:
An air eraser is provided generally in the nature of a slightly enlarged pen. Compressed air carries particulate abrasive material from the pen for abrasive removal or erasure of indicia or the like on a base. A trigger controlled air valve is provided upstream of the abrasive material whereby it is impossible for any abrasive material to clog the valve. The flow stream through the air eraser is a straight-through one so that there is no problem of abrasive errosion of corners within the eraser.

REFERENCES:
patent: 1276653 (1918-08-01), Herbert
patent: 2305976 (1942-12-01), McKnight
patent: 2441441 (1948-05-01), Paasche
patent: 2526403 (1950-10-01), Paasche
patent: 3032929 (1962-05-01), Glesener
patent: 3201901 (1965-08-01), Pauli
patent: 3344558 (1967-10-01), Kirkland

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