Shaft for a marking instrument

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Description

FIG. 1 is a top plan view of a shaft for a marking instrument showing my new design;

FIG. 2 is an enlarged scale left end elevational view;

FIG. 3 is an enlarged scale cross-sectional view thereof taken along line 3--3 of FIG. 1; and

FIG. 4 is a modified form of the shaft for a marking instrument.

The left end view of the modified embodiment at FIG. 4 is essentially the same as FIG. 2 but with the shading indicating the direction of the twist being reversed.

Referenced Cited
U.S. Patent Documents
D237705 November 1975 Anderson
263392 August 1882 Cross
Foreign Patent Documents
39687 December 1928 DKX
1191434 April 1959 FRX
Patent History
Patent number: D252815
Type: Grant
Filed: Aug 27, 1976
Date of Patent: Sep 4, 1979
Inventor: Melvin C. Coffman (Denver, CO)
Primary Examiner: Joel Stearman
Assistant Examiner: George P. Word
Attorney: Frank C. Lowe
Application Number: 5/718,314
Classifications
Current U.S. Class: Element Or Attachment (D19/54); Diagonal Striation (D19/50)
International Classification: D1906;