US4664994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosed lead storage battery and process for producing the same
Assignee: Dai Nippon Printing Co Ltd
•
Filing: 1986-09-05
•
Granted: 1987-05-12
•
Expires: 2006-09-05
Abstract
Abstract The present invention provides an enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, an electrolyte held in position by the plate assembly, and a jacket made of film- or sheet-formed synthetic resin and surrounding the plate assembly and electrolyte. The jacket is of a multilayer laminate structure made by disposing a polyolefin film on the inside contacting the plate assembly and laminating a film of thermoplastic synthetic resin in two or more layers on the outside thereof. According to the present invention, the plate assembly can be encased with an unexpensive jacket of a simple construction, and the joint of the jacket to the pole posts of the plate assembly is strengthened to offer a leak-proof enclosed lead storage battery.
Inventors
- 👤 Kiichi Koike
- 👤 Yoshie Suzuki
- 👤 Minoru Yoshinaka
- 👤 Mitsuo Okabe
- 👤 Makoto Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; H01M10/342; H01M50/00; H01M50/10; H01M50/116; H01M50/121; H01M50/124; H01M50/126; H01M50/129; H01M50/131; H01M50/133; H01M50/172; H01M50/174; H01M50/178; H01M50/50; H01M50/543; H01M50/547; H01M50/55; H01M50/552; H01M50/553; H01M50/562; H01M10/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
An enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, pole posts connected to said positive plate and said negative plates, respectively, an electrolyte held in position by said plate assembly, and a jacket made of film- or sheet-formed synthetic resin wherein: (a) each pole post is provided with a layer of polyolefin resin around at least a portion of each post, said layers of polyolefin being adhered to said posts by a layer of epoxy resin; (b) the jacket comprises a laminate film or sheet comprising a polyolefin film on the inside contacting the plate assembly and a film comprising at least two layers of thermoplastic synthetic resin on the outside thereof; (c) the jacket is heat sealed at its periphery surrounding the plate assembly, excepting a portion which serves as a safety valve and which is left in a film-to-film adhering state; and (d) the jacket is also heat sealed to the layers of polyolefin resin adhered to the pole posts.
Claim 2
Dependent Claim
172 words
An enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, pole posts connected to said positive plate and said negative plates, respectively, an electrolyte held in position by said plate assembly, and a jacket made of film- or sheet-formed synthetic resin wherein: (a) each pole post is provided with a layer of polyolefin resin around at least a portion of each post, said layers of polyolefin being adhered to said posts by a layer of epoxy resin; (b) the jacket comprises a laminate film or sheet comprising a polyolefin film on the inside contacting the plate assembly and a film comprising at least two layers of thermoplastic synthetic resin on the outside thereof; (c) the jacket is heat sealed at its periphery surrounding the plate assembly, excepting a portion which serves as a safety valve and which is left in a film-to-film adhering state; and (d) the jacket is also heat sealed to the layers of polyolefin resin adhered to the pole posts.
Claim 3
Dependent Claim
44 words
An enclosed lead storage battery according to claim 1, wherein the polyolefin resin layer formed on the pole posts is made of a material selected from the group consisting of polyethylene, ethylene copolymer or its acid-modified resin, polypropylene, propylene copolymer or its acid-modified resin.
Claim 4
Dependent Claim
38 words
An enclosed lead storage battery according to claim 1, wherein the laminate of a polyolefin film on the inside of the jacket and a film of thermoplastic synthetic resin on the outside thereof is formed by dry lamination.
Claim 5
Dependent Claim
53 words
An enclosed lead storage battery according to claim 1, wherein the film laminated on the outside of the polyolefin film of the jacket is made of a material selected from the group consisting of polyethylene terephthalate (polyester), polypropylene, nylon (polyamide), polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, polyvinyl chloride, polybutylene terephthalate and copolymers thereof.
Claim 6
Dependent Claim
39 words
An enclosed lead storage battery according to claim 1, wherein a film coated with polyvinylidene chloride or laminated with polyvinylidene chloride film is incorporated to constitute at least one layer of the laminate film or sheet forming the jacket.
Claim 7
Dependent Claim
33 words
An enclosed lead storage battery according to claim 1, wherein a net of synthetic resin fibers is incorporated to constitute at least one layer of the laminate film or sheet forming the jacket.
Claim 8
Dependent Claim
43 words
An enclosed lead storage battery according to claim 1, wherein the jacket is made by disposing a film of polyethylene-ethylene copolymer or its acid-modified resin on the inside and dry laminating on the outside thereof a polyethylene terephthalate film coated with polyvinylidene chloride.
Claim 9
Dependent Claim
26 words
An enclosed lead storage battery according to claim 1, wherein the epoxy resin layer provided on the post is roughened at its surface like a mat.
Claim 10
Dependent Claim
19 words
An enclosed lead storage battery according to claim 1, wherein the jacket is less than 177 microns in thickness.
Claim 11
Dependent Claim
17 words
An enclosed lead storage battery according to claim 1, wherein the jacket is 95-177 microns in thickness.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |