Bristle arrangement for a toothbrush

• US 5,896,614 A
• Filed: 08/15/1997
• Issued: 04/27/1999
• Est. Priority Date: 11/19/1994
• Status: Expired due to Term

• Current Assignee: Smithkline Beecham PLC (GSK plc)
• Original Assignee: Smithkline Beecham PLC (GSK plc)
• Inventors: Flewitt, Harry
• Primary Examiner(s): Till, Terrence R.
• Application Number:
  US08/836,334
• Time in Patent Office: 620 Days
• Field of Search: 15/110, 15/167.1, 15/207.2, 15/DIG. 6
• 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 9/005 where the brushing material is not made of bristles, e.g. sponge, rubber or paper
• CPC Class Codes: A46B 9/06 Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
• CPC Class Codes: A46D 1/00 Bristles; Selection of materials for bristles making artificial bristles D01D, D01F
• CPC Class Codes: A46D 1/0238 Bristles with non-round cross-section

Abstract

A toothbrush, wherein the head has a face from which project one or more strips of a flexible and resilient material, preferably combined with bristles and arranged in rows or groups of rows of the strips alternating with the rows or groups of rows of the bristles. The strips enhance the tooth cleaning effect of the toothbrush.

Claims

1. A toothbrush comprising a head and a handle disposed along a longitudinal toothbrush axis, characterized in that the head has a face from which project, in a length direction substantially perpendicular to the bristle face, one or more strips of a flexible and resilient material having a width direction, perpendicular to the length direction, which is greater than the thickness, perpendicular to the width direction of the strips, the width direction of the strips being substantially parallel to the longitudinal axis, the strips being combined with bristles and being arranged in at least one row of the strips aligned across the longitudinal axis of the toothbrush, and longitudinally alternating with at least one row of the bristles.

2. A toothbrush according to claim 1 wherein the toothbrush includes combinations of bristles and strips.

3. A toothbrush according to claim 1 or 2 wherein the strips differ in length to the bristles, so as to present an undulating profile of longer bristles and shorter strips, or vice versa.

4. A toothbrush according to claim 1 wherein the length of the strips varies across their width, so that the ends of the strips are not coplanar with the face from which the strips project.

5. A toothbrush according to claim 4 wherein the profile of the ends of widthways adjacent strips presents a concave "V" or "U" shaped profile.

6. A toothbrush according to claim 1 having at least one distal row of tufts of bristles at the end of the toothbrush head remote from the handle, at least one proximal row of tufts of bristles at the end of the toothbrush head nearest to the handle, at least one intermediate row of tufts of bristles between the distal and proximal tufts, and at least one row of strips between both the distal and intermediate tufts and between the intermediate and proximal tufts.

7. A toothbrush according to claim 1 which includes strips which have their width dimension aligned other than perpendicular to or parallel to the longitudinal axis.

9. A toothbrush according to claim 1 which includes both strips which have their width substantially perpendicular to the longitudinal axis, and strips which have their width substantially parallel to the longitudinal axis.

8. A toothbrush comprising a head and a handle disposed along a longitudinal toothbrush axis, characterized in that the head has a face from which project, in a length direction substantially perpendicular to the bristle face, one or more strips of a flexible and resilient material having a width direction, perpendicular to the length direction, which is greater than the thickness, perpendicular to the width direction, of the strips, the width direction of the strips being aligned substantially perpendicular to the longitudinal axis of the toothbrush.