Patent US3828638A successfully refreshed from Google Patents.
US3828638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing windshield wiper blades
Assignee: PERMA BLADE Inc
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Filing: 1972-08-02
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Granted: 1974-08-13
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Expires: 1992-08-02
Abstract
Abstract A method and apparatus for continuously producing wiper blades from a continuous strip of moving flexible material such that the blades are provided with longitudinally extending cavities as well as side orifices which communicate with the cavity and adapt the blade to expel washing fluid to the blade edge along the entire longitudinal extent of the blade.
Inventors
- 👤 J Bonney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:47
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/30; B60; B60S; B60S1/00; B60S1/02; B60S1/46; B60S1/48; B60S1/52; B60S1/522; B60S1/524; B60S1/04; B60S1/32; B60S1/38; B60S2001/3898; Y; Y10; Y10T; Y10T83/00; Y10T83/485; Y10T83/494; Y10T83/498; Y10T83/525; Y10T83/533; Y10T83/541; Y10T83/647; Y10T83/6476; Y10T83/6484; Y10T83/6489; Y10T83/6491; Y10T83/727; Y10T83/739; Y10T83/808; Y10T83/822; Y10T83/825
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A machine for continuously producing wiper blades from a strip of flexible material in the form of side by side wiper blades joined together at web portions provided with a longitudinally extending cavity, said machine comprising, in combination frame means; guide means on said frame means comprising first and second holding blocks defining a guide opening for said strip, the cross-sectional shape of said guide opening conforming substantially to the cross-sectional shape of said side by side wiper blades; slicing means on said frame means including a cutting edge extended through said guide opening for severing said strip at said web portion; a piercing means on said frame means for forming orifices through the side of said strip and into said cavity; means for sequentially actuating said piercing means to form said orifices at longitudinally spaced intervals along said strip; cut-off means on said frame means for severing said strip; and means for sequentially actuating said cut-off means to sever wiper blade elements from said strip.
Claim 2
Dependent Claim
166 words
A machine for continuously producing wiper blades from a strip of flexible material in the form of side by side wiper blades joined together at web portions provided with a longitudinally extending cavity, said machine comprising, in combination frame means; guide means on said frame means comprising first and second holding blocks defining a guide opening for said strip, the cross-sectional shape of said guide opening conforming substantially to the cross-sectional shape of said side by side wiper blades; slicing means on said frame means including a cutting edge extended through said guide opening for severing said strip at said web portion; a piercing means on said frame means for forming orifices through the side of said strip and into said cavity; means for sequentially actuating said piercing means to form said orifices at longitudinally spaced intervals along said strip; cut-off means on said frame means for severing said strip; and means for sequentially actuating said cut-off means to sever wiper blade elements from said strip.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |