Coating implements with material supply – Supply container and independent applicator – Applicator includes container closure or overlies material
Reexamination Certificate
1998-04-23
2001-11-06
Walczak, David J. (Department: 3751)
Coating implements with material supply
Supply container and independent applicator
Applicator includes container closure or overlies material
C401S126000
Reexamination Certificate
active
06312180
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to applicators for correction fluids.
Correction fluids are used for correcting handwritten, typewritten or photocopied markings on paper. Generally, correction fluids are applied to a paper surface in liquid form. After application, the fluids harden to a film which can effectively cover erroneous markings on the surface and can receive a corrected marking. Correction fluids typically contain a resin that provides the flexible film, and an opacifying pigment, usually titanium dioxide, dispersed in a liquid. The liquid may be water or an organic solvent.
Correction fluids are often supplied in a small container with an applicator brush attached to the cap through a stem. A user unscrews the cap from the container and withdraws the brush loaded with correction fluid. The user then contacts the erroneous marking with the brush, and correction fluid is transferred to the substrate to cover the marking.
SUMMARY OF THE INVENTION
The invention relates to an applicator that can be used to apply correction fluid. The applicator preferably includes a stem, an applicator tip including foam, and preferably a flexible material, i.e., a flexor, within the tip. The applicator is easy to use and preferably can be inserted into a correction fluid container in the same general manner as brush applicators. The applicator provides an even laydown of correction fluid on a substrate, resulting in good correction quality. The applicator has good durability and facilitates precise correction.
In one aspect, the invention relates to an applicator, including a stem and an applicator tip including foam, having a flexibility of at least 0.0005 inch of deflection per gram of force, preferably at least 0.002 inch of deflection per gram of force.
In another aspect, the invention features an applicator, including a stem and an applicator tip including foam, having an angled chisel-shaped application surface for applying correction fluid to a substrate.
In another aspect, the invention relates to a applicator including a stem and an applicator tip including a quenched foam. By quenched foam, it is meant a foam that is reticulated (substantially all membranes have been removed to make it open-celled) by chemical methods.
In another aspect, the invention relates to a applicator including a stem and an applicator tip including foam having an average pore size of between 20 ppi (pores per linear inch) and 130 ppi.
The invention further relates to correction fluid products including a body defining a reservoir and having an opening. The reservoir includes a correction fluid, and the applicator is inserted through the opening so that the portion is in contact with the correction fluid. Preferably, the product also includes an insert through the opening, through which the applicator passes during use. Preferred inserts include a narrowed neck portion that removes excess correction fluid when the applicator tip is withdrawn from the reservoir.
The invention further relates to an applicator having an applicator tip including foam, a correction fluid reservoir, including correction fluid, from which the correction fluid is fed to the applicator tip. The applicator has a flexibility of at least 0.0005 inch of deflection per gram of force. The applicator may also include a removable enclosure (e.g., a cap) for the tip.
Other features and advantages of the invention will be apparent from the description of the preferred embodiment thereof, and from the claims.
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Marshall O'Toole Gerstein Murray & Borun
The Gillette Company
Walczak David J.
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