Liquid applicator
AssigneeSakura Color Products Corporation
InventorsMasahiro Yasunaga, Shigeyasu Inoue
Life of this patent
Estimating the term…
Abstract
A liquid applicator using a roller which is effectively prevented from being disengaged from the housing thereof. The liquid applicator provides very smooth flow of ink from the initial touch of drawing without generating a scratchy effect. The improved liquid applicator introduces a roller in place of a conventional ball of a ball pen. The roller is a hollow structure. A roller-storing portion is defined by a surface having stepped tapered portions. The liquid applicator incorporates a relay core. The relay core comes into contact with the roller in the roller-storing portion to press the roller in the direction of an aperture on the roller-storing portion.
Claims18
A liquid applicator comprising:
- an ink pool having a tip;
- a supply of liquid ink in the ink pool;
- a holder which is secured to the tip of said ink pool and having a roller-storing portion and an ink passage hole;
- and
- a hollow roller having an ink applying surface disposed for rotation in said roller-storing portion of said holder,
- there being a space between the applying surface of the hollow roller and the roller-storing portion that provides a capillary tube force that prevents ink from flowing through the space to and from the ink pool,
- there being no shaft extending into the hollow roller to support the hollow roller for rotation in the holder.
A liquid applicator comprising:
- an ink pool having a tip;
- a supply of liquid ink in the ink pool;
- a holder which is secured to the tip of said ink pool and having a roller-storing portion and an ink passage hole;
- and
- a porous roller having an ink applying surface disposed for rotation in said roller-storing portion of said holder,
- there being a space between the applying surface of the porous roller and the roller-storing portion that provides a capillary tube force that prevents ink from flowing through the space to and from the ink pool,
- there being no shaft extending into the porous roller to support the porous roller for rotation in the holder.
A liquid applicator comprising:
- an ink pool having a tip;
- a supply of liquid ink in the ink pool;
- a holder which is secured to the tip of said ink pool and having a roller-storing portion and an ink passage hole;
- and
- a roller having an ink applying surface disposed in said roller-storing portion of said holder,
- there being a space between the applying surface of the roller and the roller-storing portion that provides a capillary tube force that prevents ink from flowing through the space to and from the ink pool,
- wherein the roller-storing portion is defined by a tapered surface portion, with the tapered surface portion being substantially flat and defining an obtuse angle as viewed in cross section.
A liquid applicator comprising:
- an ink pool having a tip;
- a supply of liquid ink in the ink pool;
- a holder which is secured to the tip of said ink pool and having a roller-storing portion with an aperture and an ink passage hole;
- a roller having an ink applying surface disposed in said roller-storing portion of said holder,
- there being a space between the applying surface of the roller and the roller-storing portion that provides a capillary tube force that prevents ink from flowing through the space to and from the ink pool;
- and
- a relay core disposed in said ink passage hole of said holder,
- wherein said roller is pressed toward the aperture of said roller-storing portion by said relay core,
- there being no shaft extending into the roller to support the roller for rotation on the holder.
A liquid applicator comprising:
- an ink pool having a tip;
- a supply of liquid ink in the ink pool;
- a holder which is secured to the tip of said ink pool and having a roller-storing portion and an ink passage hole;
- and
- a roller having an ink applying surface disposed in said roller-storing portion of said holder,
- there being a space between the applying surface of the roller and the roller-storing portion that provides a capillary tube force that prevents ink from flowing through the space to and from the ink pool,
- wherein the roller-storing portion is defined by at least three tapered surface portions, with each said tapered surface portion having a substantially flat shape and defining an angle as viewed in cross section.
Dependencies are inferred from the claim text.