Dispenser with rigid open pore nib
OwnerDonald Birdeninventor
Life of this patent
Estimating the term…
Abstract
A porous dispenser for typewriter white-out, coloring, microcapsules and other coating materials is made with a relatively rigid open cell foam nib. The foam has an average of from 12 to 25 pores per linear centimeter with an average pore size from 0.4 to 2 microns. The nib rigidity can be provided by a hard material nib or by having a flexible porous foam material compressed from its original volume to from 1/10th to 1/20th its original volume. The nib has less than a 20% compression when subjected to a 400 gm/cm.sup.2 pressure. The nib can be used with a pigmented coating material, microcapsules or polish with an average particle size of from 0.4 to 1 micron.
Claims20
A porous nib dispenser for a fluid coating material comprising:
- a porous nib for passage and metering of said coating material onto a surface;
- a support for said porous nib;
- a passageway within said support for said porous nib;
- said porous nib being an open pore foam having an average number of pores from 12 to 25 per linear centimeter with the average pore size being from 0.4 to 2 microns and with said nib having a rigidity such that a pressure of 400 gm/cm.sup.2 causes a compression of said nib of less than 20%.
A porous nib dispenser for a fluid coating material in combination with a fluid coating material comprising:
- a porous nib for passage and metering of said coating material onto a surface;
- a support for said porous nib;
- a passageway within said support for said porous nib;
- said porous nib being an open pore foam having an average number of pores from 12 to 25 per linear centimeter with the average pore size being from 0.4 to 2 microns and with said nib having a rigidity such that a pressure of 400 gm/cm.sup.2 causes a compression of said nib of less than 20%;
- a reservoir within said dispenser;
- said reservoir being attached to said support for conducting said coating material to said passageway and through said porous nib within said passageway;
- fluid coating material disposed within said reservoir;
- said coating material being a fluid that contains solid pigments that have an average particle size between 0.4 and 1 micron.
Dependencies are inferred from the claim text.