US3936261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing brushes
Assignee: PRO Corp A CORP OF
•
Filing: 1974-09-20
•
Granted: 1976-02-03
•
Expires: 1994-09-20
Abstract
Abstract A finished plastic-handled brush is prepared by a single molding step involving gateless molding of the brush back by a tunnel-gating and novel punch-pin finishing apparatus and process which eliminates the usual gate stud, and removing the finished brush back and securing tufts of bristles in the face of the brush back to complete the brush construction.
Inventors
- 👤 Kenneth B. Jones
- 👤 Walter C. Gorenflo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:04
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/2626; B29C45/27; B29C45/28; B29C45/2806; B29C45/46; B29C45/57; B29C45/572; B29C45/281; B29C2045/2831; B29C2045/577; Y; Y10; Y10S; Y10S425/00; Y10S425/051; Y10S425/805
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
An apparatus comprising a mold which provides a mold cavity, a cylindrical gate section communicating with said mold cavity, said gate section being equipped with a guide pin and a slidably movable punch pin which is in the form of a solid rod which acts as a piston to force the material present in the gate section into the mold and conforms with the internal shape of the gate section and its end being flush with said mold cavity.
Claim 2
Independent Claim
79 words
An apparatus comprising a mold which provides a mold cavity, a cylindrical gate section communicating with said mold cavity, said gate section being equipped with a guide pin and a slidably movable punch pin which is in the form of a solid rod which acts as a piston to force the material present in the gate section into the mold and conforms with the internal shape of the gate section and its end being flush with said mold cavity.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein the punch-pin movement is provided by a cam slide.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 wherein the cam slide is operated by means of a hydraulic cylinder.
References Cited (Backward Citations)
US2630601A
Cited
US2770011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |