Patent US3795964A successfully refreshed from Google Patents.
US3795964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming and placing tubular battery separators
Assignee: ESB Inc
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Filing: 1972-09-11
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Granted: 1974-03-12
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Expires: 1992-09-11
Abstract
Abstract Battery separator material in strip form and cut to proper size is entered tangentially into a borehole. Air streams directed tangentially to the borehole cause the strip of material to roll up into a tube of controlled diameter. When the tube is wound, a pressure differential between the two ends of the borehole causes the tube to eject into a waiting battery assembly placed on the trajectory of the rolled tube.
Inventors
- 👤 M Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:10
CPC Classifications
B; B31; B31C; B31C1/00; B29; B29C; B29C53/00; B29C53/36; B29C53/38; B29C53/40; B29C2793/00; B29C2793/0081; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/53; Y10T29/5313; Y10T29/53135; Y10T29/53657
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A machine for forming a tubular battery separator from a sheet of battery separator material which comprises: a. a block of material having a borehole passing from one end to the other; b. a slot piercing the block from one side to the borehole parallel with the axis of the borehole and tangential to the wall of the borehole. c. external first air jet means directed to the slot in the block; d. second air jet means located within the block tangential to the borehole; and e. means producing a pressure differential between one end and the other end of the borehole; whereby when a piece of separator material is placed in the vicinity of the first air jet means, it is transported via the slot into the influence of the second air jet means, the sheet of material then being rolled into a tube approximating the size of the borehole by the action of the second air jet means and by the pressure differential producing means, the so-formed tube is ejected from the borehole.
Claim 2
Dependent Claim
175 words
A machine for forming a tubular battery separator from a sheet of battery separator material which comprises: a. a block of material having a borehole passing from one end to the other; b. a slot piercing the block from one side to the borehole parallel with the axis of the borehole and tangential to the wall of the borehole. c. external first air jet means directed to the slot in the block; d. second air jet means located within the block tangential to the borehole; and e. means producing a pressure differential between one end and the other end of the borehole; whereby when a piece of separator material is placed in the vicinity of the first air jet means, it is transported via the slot into the influence of the second air jet means, the sheet of material then being rolled into a tube approximating the size of the borehole by the action of the second air jet means and by the pressure differential producing means, the so-formed tube is ejected from the borehole.
Claim 3
Dependent Claim
25 words
A machine as defined in claim 1 in which the pressure differential is caused by at least one baffle means covering parts of the borehole.
Claim 4
Dependent Claim
93 words
A machine as defined in claim 1 in which the means producing the pressure differential comprises a baffle means partially covering one end of the bore hole and guide means is located along the path of the piece of material prior to its entry into the slot; whereby, prior to and during the tube forming operation, the tube is constrained from being ejected from the borehole by the guide means and after the tube is formed being no longer constrained by the guide means is ejected from the borehole by the pressure differential.
Claim 5
Dependent Claim
71 words
A machine as defined in claim 1 in which the pressure differential producing means comprises moveable baffle means whereby during the tube forming period, the moveable baffle means is located in a first baffle position preventing the ejection of the tube and when the tube is formed, the moveable baffle means is located in a second baffle position producing a pressure differential causing the tube to be ejected from the borehole.
Claim 6
Dependent Claim
38 words
A machine as defined in claim 1 further characterized by a cell assembly placed axially with the bore hole whereby when the tube formed of the sheet is ejected from the borehole, it locates within the cell assembly.
Claim 7
Dependent Claim
22 words
A machine as defined in claim 1 further characterized by a feed means feeding separator sheets to the first air jet means.
References Cited (Backward Citations)
US1791303A
Cited
US1926060A
Cited
US3237536A
Cited
US3337064A
Cited
US3415089A
Cited
US3499072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |