Mitsubishi Pencil Kabushiki Kaisha

Kenzi Sato

Nobuyuki Nakajima

Makoto Ono

Tamotsu Eguchi

Shigeki Ohba

An applicator includes a reservoir charged with fluid. The reservoir has a discharge-controlling mechanism at one end for applying the fluid. The fluid contains at least one organic solvent, such as mythylcyclohexane, and is charged with a scarcely volatile liquid substance, such as an alkylene oxide adduct of diglycerin, having no compatibility with the applying fluid. The scarcely volatile liquid substance forms a movable plug for an end part of the applying fluid in a contact state and the rear of the plug in the reservoir is released to the atmosphere. The applicator can include writing instruments including a felt tip pen and a ballpoint pen, a corrector, an applicator for adhesive and a dressing instrument.

Applicator for fluid

A liquid applicator has a vaned collector. The collector's rear end is abutted on a partition having a concave portion, creating a gap B therebetween. A cylindrical projection is formed inside the rear sleeve concentrically on its axis so that a replaceable cartridge holding ink is removably attached with its front end fitted to the cylindrical projection. A trunk core's rear end is inserted into a communication passage that is formed in the cylindrical projection with a gap A formed between the trunk core surface and the wall surface of the communication passage. This gap A is put in communication with an ink slit of the collector via gap B. Grooves are formed in the convex portion while a number of ribs are formed apart with respect to a barrel's circumference on inner peripheral surface of the communication passage of the cylindrical projection. These ribs stably support the rear end of the trunk core. Gap A between the rear end of the trunk core and the inner peripheral surface of the communication passage of the cylindrical projection should fall within the following range: 0.02 mm&lE;A&lE;0.25 mm, and the ink should be of a water-based ink having a viscosity of 12 mPa.s or below at 25&deg; C. Gap A, gap B, slit width C and spacing D are specified so that A&lE;B&lE;C&lE;D. This setting assures smooth flow of the application liquid such as ink etc., with respect to the cartridge.

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Maebashi, Japan

Kenzi Sato