Patent US4491491A successfully refreshed from Google Patents.
US4491491A
Expired / Lapsed
US
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Ultrasonic separation apparatus
Assignee: Dreamwell Ltd
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Filing: 1983-11-02
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Granted: 1985-01-01
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Expires: 2003-11-02
Abstract
Abstract An ultrasonic separation apparatus is disclosed which provides simultaneous cutting and sealing of thermoplastic materials. Both relatively thin and thick materials may be cut and sealed. The apparatus includes a cutting mechanism having a cutting blade mounted for oscillatory movement along its longitudinal axis. Cutting takes place at a controlled rate to allow sufficient time for simultaneous sealing to occur. The apparatus may be particularly adapted for cutting strings of pocketed coil springs to length.
Inventors
- 👤 Walter Stumpf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:28
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B26; B26D; B26D7/00; B26D7/08; B26D7/086; B29C65/74; B29C65/743; B29C65/7443; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/8324; B29C66/84; B29C66/849; B29C66/834; B29C66/8351; B29C66/83521; B29L; B29L2031/00; B29L2031/774; B29L2031/7742; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
An ultrasonic cutting and sealing apparatus comprising: an ultrasonic horn; means coupled to said horn for causing the resonant vibration thereof; a cutting mechanism, said cutting mechanism including a housing and an elongate cutting blade mounted to said housing, a space being defined between at least one end of said cutting blade and said housig to allow said cutting blade to oscillate along its longitudinal axis; and means for moving said ultrasonic horn and said cutting mechanism toward each other.
Claim 2
Dependent Claim
80 words
An ultrasonic cutting and sealing apparatus comprising: an ultrasonic horn; means coupled to said horn for causing the resonant vibration thereof; a cutting mechanism, said cutting mechanism including a housing and an elongate cutting blade mounted to said housing, a space being defined between at least one end of said cutting blade and said housig to allow said cutting blade to oscillate along its longitudinal axis; and means for moving said ultrasonic horn and said cutting mechanism toward each other.
Claim 3
Dependent Claim
15 words
An apparatus as defined in claim 1 including means for resiliently mounting said cutting mechanism.
Claim 4
Dependent Claim
51 words
An apparatus as defined in claim 1 wherein said housing includes front and rear walls defining a slot therebetween, said cutting blade being partially positioned within said slot, and a pair of end walls, said space being defined between an end of said cutting blade and one of said end walls.
Claim 5
Dependent Claim
43 words
An apparatus as defined in claim 3 wherein said cutting blade includes a cutting edge extending from said slot, said housing including a pair of supporting surfaces supporting the opposing ends of said cutting edge to hold said cutting blade within said slot.
Claim 6
Dependent Claim
76 words
An apparatus as defined in claim 1 including a mounting plate, a cushioning plate resiliently supported by said mounting plate, front and rear retaining plates mounted to said cushioning plate and defining a slot therebetween, said cutting blade partially positioned within said slot, a pair of end walls mounted to said front and rear retaining plates for limiting movement of said cutting blade along its longitudinal axis, and means retaining said cutting blade within said slot.
Claim 7
Dependent Claim
26 words
An apparatus as defined in claim 5 wherein said retaining means are a pair of L-shaped end caps mounted to said front and rear retaining plates.
Claim 8
Dependent Claim
18 words
An apparatus as defined in claim 6 including a spacer plate between said front and rear retaining plates.
Claim 9
Independent Claim
80 words
A method for ultrasonically cutting and sealing a material, comprising: providing a cutting mechanism including an elongate cutting blade mounted thereto, said cutting blade being movable for a limited distance along its longitudinal axis; providing an ultrasonic horn; positioning said material between said cutting blade and ultrasonic horn and in contact therewith; and causing said ultrasonic horn to resonate at a desired frequency, thereby causing said cutting blade to oscillate along its longitudinal axis and cut and seal said material.
Claim 10
Independent Claim
80 words
A method for ultrasonically cutting and sealing a material, comprising: providing a cutting mechanism including an elongate cutting blade mounted thereto, said cutting blade being movable for a limited distance along its longitudinal axis; providing an ultrasonic horn; positioning said material between said cutting blade and ultrasonic horn and in contact therewith; and causing said ultrasonic horn to resonate at a desired frequency, thereby causing said cutting blade to oscillate along its longitudinal axis and cut and seal said material.
Claim 11
Dependent Claim
23 words
A method as described in claim 8 including the step of resiliently urging said cutting mechanism against said material and said ultrasonic horn.
Claim 12
Dependent Claim
17 words
A method as described in claim 8 wherein said material is pocket material encasing a coil spring.
References Cited (Backward Citations)
US3378429A
Cited
US3679526A
Cited
US3697357A
Cited
US3821048A
Cited
US3852144A
Cited
US4025374A
Cited
US4161420A
Cited
US4439977A
Cited
US4227959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |