Felt tip pen with valve and flexible bellows

Details Felt tip pen with valve and flexible bellows Felt tip pen with valve and flexible bellows

B - Operations, Transporting

43

K

207/49

B43K 5/08 (2006.01) B43K 1/12 (2006.01) B43K 5/04 (2006.01) B43K 5/18 (2006.01) B43K 8/02 (2006.01)

Patent

CA 1051826

ABSTRACT OF THE DISCLOSURE In a writing instrument comprising a writing core and an ink tank, the contact of the writing core with the ink in the ink tank is intercepted so that unnecessary loss of the ink due to evaporation from the core surface and excessive sup- ply of the ink to the core are effectively prevented. Merely pressing the end portion of the outer case of the writing in- strument allows a spring, a valve member and a flexible bellows portion of the ink tank to supply an appropriate amount of ink into the core.

258947

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