Patent ID: 6742952
Filing Date: 2004-06-01
Classification: B43K,Y10S

Abstract:
A writing instrument cartridge comprising:an inner layer comprising a first polymeric material having sufficient anti-wetting properties with respect to a writing medium such that said first polymeric material exhibits substantially clear drain of said writing medium; an outer layer comprising a second polymeric material; and a writing tip coupled to one end of the writing medium reservoir, wherein: said inner layer material and said outer layer material have a translucency such that, when combined, said writing medium reservoir exhibits sufficient translucency to allow a user externally to observe visually the level of said writing medium in said writing medium reservoir; and said inner layer material and said outer layer material are sufficiently compatible such that normal handling and normal use of said writing medium reservoir by said user does not substantially affect one or more of the following: said translucency, said substantially clear drain capability, and further normal function of said writing medium reservoir.