Ball-point instruments writing with improved transitorially eras

Details Ball-point instruments writing with improved transitorially eras Ball-point instruments writing with improved transitorially eras

1976-03-26

1978-06-27

Welcome, Joan E.

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 29, 106 32, 106241, 260 27BB, 260 4221, C08L 9300, C09D 1106, C09D 1108, C09D 1110

Patent

active

040972909

ABSTRACT:
The invention relates to a ball-point writing instrument capable of writing with an intense colored or black line which is easily visible and readable and as permanent and eventually non-erasable as the best customary ball-pen ink traces, but which, in addition, is easily erasable by mechanical means for an initial period of about two to four hours as a normal graphite pencil trace, without the use of bleaches or chemicals. These properties are attained by the provision of a novel ink composition containing stated rubbers and volatile solvents which control erasability.

REFERENCES:
patent: 2036765 (1936-04-01), Morris
patent: 2852397 (1958-09-01), Goessling
patent: 2956038 (1960-10-01), Juelss et al.
patent: 3425779 (1969-02-01), Fisher et al.
patent: 3572954 (1971-03-01), Cheron
patent: 3740159 (1973-06-01), Smagala-Romanoff
patent: 3875105 (1975-04-01), Daugherty et al.

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