Ink backflow preventive for water-based ball-point pens

Details Ink backflow preventive for water-based ball-point pens Ink backflow preventive for water-based ball-point pens

2011-03-15

2011-03-15

Le, Huyen (Department: 3751)

Coating implements with material supply

Including floating follower in reservoir

Fluid follower

Reexamination Certificate

active

07905671

ABSTRACT:
The ink backflow preventive of the present invention contains at least refractory and/or involatile organic liquid substances and gelling agents, wherein the oil separation degree under the specific condition is prepared to be 1 to 15 %, in which as at least said gelling agents, styrene-based thermoplastic elastomer is contained and said styrene-based thermoplastic elastomer is composed of two or more of said styrene-based thermoplastic elastomer with the same molecular weight and with the different average molecular weight.

REFERENCES:
patent: 2005/0074273 (2005-04-01), Miyamoto et al.
patent: 11-50041 (1999-02-01), None
patent: 3016749 (1999-12-01), None
patent: 2001-353993 (2001-12-01), None
patent: 2004-142323 (2004-05-01), None
patent: WO 03/057507 (2003-07-01), None

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