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US4479844A
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Impulse-action heat-sealer
Assignee: SEISAKUSHO FUJI YK
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Filing: 1983-03-21
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Granted: 1984-10-30
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Expires: 2003-03-21
Abstract
Abstract An impulse-action heat-sealer for manufacturing a sealed article, as a bag or the like, by pressingly keeping the portions to be sealed and effecting the sealing by means of heating with short-time electric current. The sealer has a pressing-sealer lever as is actuated electromagnetically, and is further equipped with an air-damper to function as a buffer for the actuating movement of the pressing-sealer lever.
Inventors
- 👤 Teruo Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:44
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457; B29C66/82; B29C66/822; B29C66/8221; B29C66/8227; B29C66/824; B29C66/8244; B29C66/83; B29C66/832; B29C66/8324; B29C66/84; B29C66/849; B29C66/861; B29C66/87; B29C66/874; B29C66/8742; B29C66/818; B29C66/8181; B29C66/90; B29C66/92; B29C66/924; B29C66/9241; B29C66/93; B29C66/934; B29C66/93441; B29C66/94; B29C66/944; B29C66/949; B29C66/95; B29C66/959; B29C66/9592; B29L; B29L2031/00; B29L2031/712; B29L2031/7128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
An impulse-action heat-sealer comprising a body proper, an electromagnet having an electromagnetic coil, an iron core movably mounted along an axis of said coil and a pressing sealing lever having an actuation rod connected to said iron core, wherein said coil is mounted on said body proper, said coil is of the direct-current energization type and said electromagnet is provided with an air-damper for buffering movement of said pressing-sealer lever.
Claim 2
Dependent Claim
70 words
An impulse-action heat-sealer comprising a body proper, an electromagnet having an electromagnetic coil, an iron core movably mounted along an axis of said coil and a pressing sealing lever having an actuation rod connected to said iron core, wherein said coil is mounted on said body proper, said coil is of the direct-current energization type and said electromagnet is provided with an air-damper for buffering movement of said pressing-sealer lever.
Claim 3
Dependent Claim
14 words
The impulse-action heat-sealer of claim 1, wherein said electromagnet is of the solenoid-clapper type.
Claim 4
Dependent Claim
21 words
The impulse-action heat-sealer of claim 1, wherein said air-damper has an air-vent passage and a check valve disposed in said passage.
Claim 5
Dependent Claim
14 words
The impulse-action heat-sealer of claim 3, wherein said electromagnet is of the solenoid-clapper type.
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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |