Toothbrush having improved tuft retention and anchor wire

• US 8,402,591 B2
• Filed: 07/01/2009
• Issued: 03/26/2013
• Est. Priority Date: 07/01/2009
• Status: Active Grant

• Current Assignee: Colgate-Palmolive Company
• Original Assignee: Colgate-Palmolive Company
• Inventors: Paciullo, Francis P.
• Primary Examiner(s): CHIN, RANDALL E
• Application Number:
  US12/496,380
• Publication Number:
  US 20110000040A1
• Time in Patent Office: 1,364 Days
• Field of Search: 151/90, 151/911, 151/95, 152/05, 151/671
• US Class Current: 15/167.1
• CPC Class Codes: A46B 2200/1066 Toothbrush for cleaning the teeth or dentures A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04
• CPC Class Codes: A46B 3/16 by wires or other anchoring means, specially for U-shaped bristle tufts
• CPC Class Codes: A46B 9/04 Arranged like in or for toothbrushes

Abstract

An ansate implement, especially a toothbrush, having improved tuft retention and a staple for use therewith. The staple has a specially designed topography that provides reliable anchoring and creation from cost effective materials. In one embodiment, the invention is an ansate implement comprising: a handle; a head connected to said handle and having at least one hole extending into the head from a surface; at least one cleaning element positioned in the hole; and a staple located in the hole anchoring the cleaning element in the tuft hole, the staple having a longitudinal axis and a first major surface, wherein a plurality of spaced apart grooves are formed into the first major surface, each of the grooves extending along a linear axis from a bottom edge of the staple toward a top edge of the staple, the linear axis intersecting the longitudinal axis at an acute angle of 40 to 70 degrees.

Claims

1. A toothbrush comprising:

a handle;

a head connected to said handle and having at least one tuft hole extending into the head from a surface;

at least one tuft of bristles positioned in the tuft hole; and

a brass staple located in the tuft hole anchoring the tuft of bristles in the tuft hole, the staple having a longitudinal axis and a first major surface, wherein a plurality of substantially parallel grooves are formed into the first major surface, each of the grooves extending along a linear axis from a bottom edge of the brass staple to a top edge of the brass staple, the linear axis intersecting the longitudinal axis at an acute angle of 40 to 70 degrees.

2. The toothbrush of claim 1 wherein the tuft of bristles are substantially U-shaped having a bight portion and leg portions, the U-shaped tuft of bristles anchored in the tuft hole by the brass staple so that the leg portions extend upward and protrude from the tuft hole, the brass staple located between the leg portions and above the bight portion of the brass staple.

3. The toothbrush of claim 1 wherein the acute angle is approximately 60 degrees.

4. The toothbrush of claim 1 wherein the staple has a thickness and the grooves have a depth no greater than one-third of the depth of the thickness of the staple.

5. The toothbrush of claim 1 wherein the brass staple is a flat wire having a substantially rectangular transverse cross-section.

6. The toothbrush of claim 1 wherein the grooves are evenly spaced apart and cover the substantial entirety of the first major surface.

7. The toothbrush of claim 6 wherein adjacent grooves are separated by a distance of 0.29 and 0.31 millimeters.

8. The toothbrush of claim 6 wherein the grooves have a width of 0.09 to 0.10 millimeters.

9. The toothbrush of claim 6 wherein the grooves have a depth of 0.09 to 0.10 millimeters.

10. The toothbrush of claim 1 wherein the brass staple comprises a second major surface opposite the first major surface, and wherein only the first major surface comprises the grooves, the second major surface being substantially flat and free of grooves.

11. The toothbrush of claim 1 wherein the tuft hole has a central axis, the longitudinal axis of the staple being substantially perpendicular to the central axis of the tuft hole.

12. A toothbrush comprising:

a handle;

a head connected to said handle and having at least one tuft hole extending into the head from a surface;

at least one tuft of bristles positioned in the tuft hole; and

a brass staple located in the tuft hole anchoring the tuft of bristles in the tuft hole, the staple having a longitudinal axis and a first major surface, wherein a plurality of substantially parallel grooves are formed into the first major surface, each of the grooves extending along a linear axis from a bottom edge of the staple to a top edge of the staple, the linear axis intersecting the longitudinal axis at an acute angle of 40 to 70 degrees; and

each of the grooves having a width and adjacent grooves separated by a distance, wherein the ratio of the distance to the width is 3.0 to 4.0.

13. An ansate implement comprising:

a handle;

a head connected to said handle and having at least one hole extending into the head from a surface;

at least one cleaning element positioned in the hole; and

a brass staple located in the hole anchoring the cleaning element in the hole, the staple having a longitudinal axis and a first major surface, wherein a plurality of spaced-apart grooves are formed into the first major surface, each of the grooves extending along a linear axis from a bottom edge of the staple toward a top edge of the staple, the linear axis intersecting the longitudinal axis at an acute angle of 40 to 70 degrees.

14. The ansate implement of claim 13 wherein the plurality of grooves extend substantially parallel to one another.

15. A brass staple for securing cleaning elements within an ansate implement, the staple comprising a flat wire having a longitudinal axis and a first major surface, wherein a plurality of spaced-apart grooves are formed into the first major surface, each of the grooves extending along a linear axis from a bottom edge of the flat wire toward a top edge of the flat wire, the linear axis intersecting, the longitudinal axis at an acute angle of 40 to 70 degrees.