# US 2012/0073070 A1 · Brush Head Manufacturing Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2012/0073070 A1 - Document ID: US20120073070A1 - Status: Published application - Kind: A1 - Application number: 13/236,903 - Filed: 2011-09-20 - Published: 2012-03-29 - Earliest claimed: 2010-09-29 - Assignees: Braun GmbH - Inventors: Raimund Nirwing; Frank Gliemroth; Ulrich Stoerkel; Thomas Fritsch - Web page: https://patentgrep.com/patent/US20120073070A1 ## CPC - A46B 9/08: Supports or guides for bristles - A46D 1/055: Combing; Mixing; Sorting - A61C 17/3454: {Translation along the axis perpendicular of the axis of toothbrush handle and in the plane defined by the bristle holder} - A46B 2200/1066: Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04) - A61C 17/222: {Brush body details, e.g. the shape thereof or connection to handle} - A46B: BRUSHES (handles not integral with brushware B25G) - A46D: MANUFACTURE OF BRUSHES - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) ## Abstract A method of manufacturing a brush head is disclosed. The method includes the steps of providing a bristle carrier on which at least a bristle tuft including a plurality of bristles is mounted; providing a cover structure having at least an aperture; constraining the free ends of the plurality of bristles of the bristle tuft into a defined cross sectional geometry such that it fits within the cross sectional area of the aperture; moving the cover structure and the bristle carrier relative to each other until the constrained bristle tuft and the aperture are positioned in spatial alignment; and releasing the constraint while moving the cover structure into a destination position in which the bristle tuft extends through the aperture. ## Claims ### Claim 1 A method of manufacturing a brush head comprising the steps of: providing a bristle carrier on which at least a bristle tuft including a plurality of bristles is mounted; providing a cover structure having at least an aperture; constraining the free ends of the plurality of bristles of the bristle tuft into a defined cross sectional geometry such that it fits within the cross sectional area of the aperture; moving the cover structure and the bristle carrier relative to each other until the constrained bristle tuft and the aperture are positioned in spatial alignment; and releasing the constraint while moving the cover structure into a destination position in which the bristle tuft extends through the aperture. ### Claim 2 (depends on 1) The method of manufacturing according to claim 1, wherein the step of constraining the free ends of the bristles includes moving a constraining structure relative to the bristle carrier. ### Claim 3 (depends on 2) The method of manufacturing according to claim 2, wherein the constraining structure includes at least two constraining elements, wherein one constraining element is a comb-like constraining element having a plurality of prongs. ### Claim 4 (depends on 3) The method of manufacturing according to claim 3, wherein the prongs of the comb-like constraining element have rounded edges. ### Claim 5 (depends on 2) The method of manufacturing according to claim 2, wherein in the step of constraining the free ends of the bristles, the constraining structure is moved from a first position close to the mounting surface of the bristle carrier to a second position close to the free ends of the bristles. ### Claim 6 (depends on 5) The method of manufacturing according to claim 5, wherein in the step of releasing the constraint the constraining structure is moved to a third position distal to the bristle carrier. ### Claim 7 (depends on 1) The method of manufacturing according to claim 1, further comprising at least two bristle tufts each have a plurality of bristles mounted on the bristle carrier. ### Claim 8 (depends on 7) The method of manufacturing according to claim 7, wherein at least four bristle tufts are mounted on the bristle carrier in at least two rows, each row having at least two tufts. ### Claim 9 (depends on 3) The method of manufacturing according to claim 3, wherein the constraining structure has four constraining elements forming two sub-constraining structures, each sub-constraining structure having two of the constraining elements, and the two sub-constraining structures being angled to each other. ### Claim 10 (depends on 1) The method of manufacturing according to claim 1, wherein the cover structure has at least two apertures. ### Claim 11 (depends on 1) The method of manufacturing according claim 1, wherein the step of constraining the free ends of the bristles of the bristle tuft includes compressing the bristle tuft such that the bristle density in the constrained part of the bristle tuft is higher than the bristle density of the unconstrained bristle tuft at the mounting surface. ### Claim 12 (depends on 7) The method of manufacturing according to claim 7, wherein in the step of moving the cover structure into the destination position at least two bristle tufts move into the aperture. ### Claim 13 A brush head comprising: a cover structure having at least an aperture and a bristle carrier on which at least a bristle tuft having a plurality of bristles is mounted, which bristle tuft extends through the aperture, wherein the aperture has in at least a first spatial aperture extension direction a smaller width than the respective width of the bristle tuft at its free end. ### Claim 14 (depends on 13) The brush head according to claim 13, wherein the bristle carrier is arranged so as to be movable relatively to the cover structure.