Refill for correction pen and refill unit

Abstract

A refill for a correction pen which is excellent insolvent resistance and moldability and can make its content, i.e., a correction fluid having methyl cyclohexane as the main solvent and the remaining amount easily visible during usage and as time passes, is constructed of a molded article of a polyamide resin obtained from monomers having an aromatic ring or a naphthene ring, a molded article of a blend of two or more kinds of polyamide resins, or a molded article having a multi-layered structure of two or more layers whose innermost layer in contact with the correction fluid is constituted of a polyamide resin. The applying part of a refill unit mounted on a ballpoint type applicator having a pressurizing mechanism in linkage with clicking action is formed by press fitting the rear end of a ballpoint pen tip having a rotatable ball to the attachment portion at the front end of an ink reservoir and a metal tube is squeezed to cover the outer periphery of the attachment portion at the front end of the ink reservoir to which the tip is fitted.

Description

technical field [0001] The present invention relates to a refill for a correction pen excellent in transparency and visibility (clear drainability), and also relates to a refill unit made of synthetic resin which is attached to a correction pen such as a ballpoint pen type On the applicator, the tip of the ballpoint pen can be protruded and retracted from the front of the barrel by means of a clicking mechanism and has a pressurizing mechanism linked to the clicking action. Background technique [0002] Recently, in consideration of environmental issues, there has been a need for a correction fluid container that stores correction fluid in a so-called refillable form. In order to develop the correction fluid container into a refillable form, it is necessary to select a solvent-resistant material because methylcyclohexane, the main solvent of the correction fluid, is highly volatile. It is also necessary to select a material that has a transparency that allows monitoring of ...

AI Technical Summary

Problems solved by technology

[0004] Polyamide resin molded articles made of aliphatic monomers such as nylon 12 and the like described in these documents have solvent resistance but do not have sufficiently high transparency

In addition, the correction fluid tends to adhere to the inner wall surface of the container and does not flow down as the correction fluid is consumed in use, so there are still problems that the remaining amount of the correction fluid cannot be properly monitored and it is difficult to Correction Fluid Completely Used Up

[0009] In addition, due to the use of the tip holder, the number of parts increases, causing some problems in machining accuracy and assembly accuracy

[0010] In addition, the refill unit has a tip that is press-fit directly onto an ink reservoir made of synthetic resin and is mounted to a ballpoint pen-type applicator whose tip can protrude from the front of the cartridge by means of a pressing mechanism. or retracted and the applicator has a pressurizing mechanism linked to the pressing action, in refill units additional pressure is applied from the rear end of the ink reservoir, with the ink reservoir press-fitted with the tip The internal pressure at the front, together with the pressure on the ball point tip during application, leads to the problem that there is a greater chance of the tip falling off and correction fluid leaking than usual

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