Patent US3597787A successfully refreshed from Google Patents.
US3597787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush manufacture
Assignee: Bissell Inc
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Filing: 1969-04-01
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Granted: 1971-08-10
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Expires: 1989-04-01
Abstract
Abstract A brush backing of relatively rigid foamed cellular polyurethane is pierced at a plurality of locations to form openings for receiving unitary bristle tufts. The piercing action creates barbs in the backing which firmly secure the tufts. The pierced openings may be formed to receive circular as well as flat tufts.
Inventors
- 👤 Henry J Rosendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:18
CPC Classifications
A; A46; A46D; A46D3/00; A46D3/06; A46B; A46B5/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A method of manufacturing a carpet sweeper brush roll from a relatively rigid foamed cellular roller backing and a plurality of unitary bristle tufts, comprising the steps of: a. piercing said backing at a plurality of spaced locations to form elongated noncircular openings having barbs therein, b. and subsequently inserting tufts into said pierced openings so that said tufts take the noncircular shape of said openings and so that said barbs engage the tufts and firmly hold the latter against release from the backing.
Claim 2
Independent Claim
84 words
A method of manufacturing a carpet sweeper brush roll from a relatively rigid foamed cellular roller backing and a plurality of unitary bristle tufts, comprising the steps of: a. piercing said backing at a plurality of spaced locations to form elongated noncircular openings having barbs therein, b. and subsequently inserting tufts into said pierced openings so that said tufts take the noncircular shape of said openings and so that said barbs engage the tufts and firmly hold the latter against release from the backing.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the said roller backing includes a relatively smooth skin, and wherein said piercing step tears said skin to form barb means on the edges of the torn skin portions.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said piercing step ruptures the cells beneath the skin of said roller backing to form a plurality of barbs.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said piercing step substantially permanently compresses said roller backing surrounding said openings.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said roller backing has a minimum density of about 15 pounds per cubic foot.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said roller backing is comprised of a resilient polyurethane.
Claim 8
Dependent Claim
63 words
A carpet sweeper brush roll comprising: a. a relatively rigid foamed cellular roller Backing having a plurality of elongated noncircular pierced openings therein, with the walls of said openings forming a plurality of barbs, b. and a unitary bristle tuft disposed in and taking the noncircular shape of each said opening and anchored therein by frictional engagement by said barbs with the tuft.
Claim 9
Dependent Claim
63 words
A carpet sweeper brush roll comprising: a. a relatively rigid foamed cellular roller Backing having a plurality of elongated noncircular pierced openings therein, with the walls of said openings forming a plurality of barbs, b. and a unitary bristle tuft disposed in and taking the noncircular shape of each said opening and anchored therein by frictional engagement by said barbs with the tuft.
Claim 10
Dependent Claim
44 words
The brush of claim 7 wherein said roller backing is formed of a continuous cellular structure having a relatively smooth skin forming the surface thereof, and wherein at least a portion of said barbs are formed by the edges of a torn skin portion.
Claim 11
Dependent Claim
94 words
The brush of claim 7 wherein said roller backing is formed of a continuous cellular structure having a relatively smooth skin forming the surface thereof, and wherein at least a portion of said barbs are formed by ruptured cells in said continuous cellular structure. , 10. The brush of claim 7 wherein said roller backing is formed of a continuous cellular structure having a relatively smooth skin forming the surface thereof, and wherein said barbs are formed by the edges of a torn skin portion and by ruptured cells in said continuous cellular structure.
Claim 12
Dependent Claim
33 words
The brush of claim 7 wherein the continuous cellular structure immediately surrounding the pierced opening is of greater density than the density of the portions of the backing spaced further from said opening.
Claim 13
Dependent Claim
20 words
The brush of claim 7 wherein said roller backing has a minimum density of about 15 pounds per cubic foot.
Claim 14
Dependent Claim
141 words
A carpet sweeper brush roll comprising: a. a slightly resilient relatively rigid polyurethane foam cellular roller backing having a minimum density of about 15 pounds per cubic foot, b. said roller backing being formed of a continuous cellular structure having a relatively smooth skin forming the surface thereof, c. said backing having a plurality of elongated noncircular pierced openings therein with the walls of said openings having barbs formed by the edges of a torn skin portion and by ruptured cells in said continuous cellular structure, d. The continuous cellular structure immediately surrounding said pierced openings being of greater density than the density of the portions of the roller backing spaced farther from said openings, e. and a unitary bristle tuft disposed in and taking the noncircular shape of each said opening and anchored therein by frictional engagement with said barbs.
Claim 15
Dependent Claim
141 words
A carpet sweeper brush roll comprising: a. a slightly resilient relatively rigid polyurethane foam cellular roller backing having a minimum density of about 15 pounds per cubic foot, b. said roller backing being formed of a continuous cellular structure having a relatively smooth skin forming the surface thereof, c. said backing having a plurality of elongated noncircular pierced openings therein with the walls of said openings having barbs formed by the edges of a torn skin portion and by ruptured cells in said continuous cellular structure, d. The continuous cellular structure immediately surrounding said pierced openings being of greater density than the density of the portions of the roller backing spaced farther from said openings, e. and a unitary bristle tuft disposed in and taking the noncircular shape of each said opening and anchored therein by frictional engagement with said barbs.
References Cited (Backward Citations)
US3425084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |