US4216638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapping machine
Assignee: Toyo Syokuhin Kikai KK
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Filing: 1978-04-10
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Granted: 1980-08-12
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Expires: 1998-04-10
Abstract
Abstract A wrapping machine has a heat sealing band running horizontally forward along a feed passage which lies in front of a former which forms a strip piece of film into a tube. The heat sealing band is put on a pair of electrode pulleys, and its upper portion between a pair of the electrode pulleys which runs along the feed passage is charged with electricity directly through a pair of the electrode pulleys.
Inventors
- 👤 Toshio Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/18; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C65/228; B29C65/229; B29C65/24; B29C65/30; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/4322; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/818; B29C66/8182; B29C66/81821; B29C66/8187; B29C66/81871; B29C66/82; B29C66/822; B29C66/8223; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/83421; B29C66/83423; B29C66/8351; B29C66/83511; B29C66/83513; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91411; B29C66/91441; B29C66/91443; B29C66/9161; B29C66/91651; B29C66/91655; B29C66/919; B29C66/9192; B29C66/91921; B29C66/91931; B29C66/91951; B29C66/70; B29C66/72; B29C66/723
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A wrapping maching comprising: forming means for forming a film strip into a tube with a seam; a pair of horizontally adjacent receiving belts for receiving the formed film strip; an elongated heat sealing band having a portion disposed coplanar between said receiving belts; a press belt adapted to press said tube forms against said heat sealing band; a pair of electrode pulleys at the ends of said heat sealing band portion; said electrode pulleys comprising; a shaft; a bearing on said shaft; an insulating ring on said bearing; a conductive ring on said insulating ring; a slip element between said electrode and said conducting ring; electrode means for applying an electric current through said pulleys to said coplanar portion of said heat sealing band; said heat sealing band passing over said conductive rings on said pulleys whereby electric current is conducted to the heat sealing portion of said band; whereby said heat sealing band seals the seam on said film tube.
Claim 2
Dependent Claim
162 words
A wrapping maching comprising: forming means for forming a film strip into a tube with a seam; a pair of horizontally adjacent receiving belts for receiving the formed film strip; an elongated heat sealing band having a portion disposed coplanar between said receiving belts; a press belt adapted to press said tube forms against said heat sealing band; a pair of electrode pulleys at the ends of said heat sealing band portion; said electrode pulleys comprising; a shaft; a bearing on said shaft; an insulating ring on said bearing; a conductive ring on said insulating ring; a slip element between said electrode and said conducting ring; electrode means for applying an electric current through said pulleys to said coplanar portion of said heat sealing band; said heat sealing band passing over said conductive rings on said pulleys whereby electric current is conducted to the heat sealing portion of said band; whereby said heat sealing band seals the seam on said film tube.
Claim 3
Dependent Claim
26 words
The wrapping machine according to claim 1 wherein said receiving belts and said heat sealing band are driven in the same direction at the same speed.
Claim 4
Dependent Claim
40 words
The wrapping machine according to claim 1 wherein said heat sealing band passes over a series of idler rollers and pinch rollers; said heat sealing band having a total length which is very long compared to the heat sealing length.
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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |