Push-type writing instrument

Details Push-type writing instrument Push-type writing instrument

1987-10-21

1989-07-04

Bratlie, Steven A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 94, B43K 2116, B43K 2122

Patent

active

048446394

ABSTRACT:
A push-type writing instrument essentially comprising an outer body having a tapered forward portion in which lead is retained. The lead is retained by a pair of radially opposed fingers provided on the tapered forward portion for frictional engagement with a lead. A lead containing inner sleeve has a rearward section of a larger diameter and a forward section of a substantially smaller diameter. The forward section of the inner sleeve is formed with a tapered portion having a pair of longitudinal slots rendering the tapered portion a radially contractible nature thereby constituting a lead clamping means in a cooperative manner with a slidable tightening ring provided about the tapered portion. A spring is coiled about the forward section of the inner sleeve for urging the inner sleeve to retain the writing instrument in a normal writing position.

REFERENCES:
patent: 253803 (1882-02-01), Wittmann
patent: 381612 (1888-04-01), Bussler
patent: 2046836 (1936-07-01), Neary
patent: 2358091 (1944-09-01), Lovejoy
patent: 2427648 (1947-09-01), Farrington
patent: 2509849 (1950-05-01), Von Allmen
patent: 2563551 (1951-08-01), Refsdal
patent: 3922098 (1975-11-01), Katz

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