Title:
SHAFT CYLINDER OF WRITING INSTRUMENT
Document Type and Number:
Japanese Patent JP3704189
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate the possibilities that an elastic material might not b separated r deviated out of place, if a stress is applied to the elastic material by insetting the elastic material to a recessed groove in a shaft cylinder and firmly fixing it in the groove, in the elastic material located at a part near an especially easily separable open window.
SOLUTION: A shaft cylinder 1 is structurally designed so that an elastic material 2 is formed on the outer periphery of a grip part 1A using a double molding die or an insert molding die. In addition, a recessed groove 1C is formed on the outer periphery of the shaft cylinder 1 in proximity to the open window 1B, and the elastic material 2 formed on the grip part 1A of the shaft cylinder 1 is formed way deep into the recessed groove 1C.
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Inventors:
Hiroyuki Watanabe
Application Number:
JP4425196A
Publication Date:
October 05, 2005
Filing Date:
February 06, 1996
Export Citation:
Assignee:
Pilot Precision Co., Ltd.
International Classes:
B43K23/008; B43K3/00; (IPC1-7): B43K23/008; B43K3/00
Domestic Patent References:
| JP5045509Y2 | ||||
| JP7015373U | ||||
| JP4100892U | ||||
| JP63148475U | ||||
| JP57193397A | ||||
| JP7290876A | ||||
| JP8207484A |
Other References:
ぺんてる 1991 総合カタログ,ぺんてる株式会社,1990年12月 1日,p.18