Patent US2819719A successfully refreshed from Google Patents.
US3844869A
Expired / Lapsed
US
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Apparatus for ultrasonic welding of sheet materials
Assignee: Crompton and Knowles Corp
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Filing: 1972-12-20
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Granted: 1974-10-29
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Expires: 1992-12-20
Abstract
Abstract An apparatus for joining sheets of thermoplastic material by ultrasonic vibration welding in which the welds are formed between the working surface of an ultrasonic resonator and opposing surfaces of anvils arranged in a changing pattern; means are disclosed for modifying the total energy transmitted by the resonator to the portions of the sheet material between the resonator and anvils so that the amount of energy is greater for a higher total surface area and less for a lower total surface area of the opposing surfaces of the anvils.
Inventors
- 👤 E Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/05; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/083; B29C65/086; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/21; B29C66/23; B29C66/234; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/816; B29C66/8161; B29C66/82; B29C66/822; B29C66/8221; B29C66/8226; B29C66/824; B29C66/8242; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/90; B29C66/93; B29C66/934; B29C66/8351; B29C66/83511; B29C66/92; B29C66/924; B29C66/9241; B32B2310/00; B32B2310/028
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
194 words
Apparatus for joining two or more sheets, at least one of which contains a thermoplastic material, comprising: a. an ultrasonic electro-acoustic converter; b. a resonator connected to said converter and having a working surface; c. anvil means having surfaces for opposing and cooperating with said working surface so that energy will be transmitted to said sheets by said resonator for producing welds in those portions of said sheets placed between said working surface and said opposing surfaces, wherein the total surface area of said opposing surfaces varies during operation of said apparatus; d. means for advancing the sheet-like elements to be joined between said resonator and said anvil means in contact with said working surface and said opposing surfaces; e. means for modifying the total amount of energy transmitted by the resonator to sAid sheets; and f. control means operatively connectd to said modifying means so that energy will be transmitted by said resonator to said sheets at at least two different rates, a relatively high rate for a relatively high total surface area of said opposing surfaces and a relatively low rate for a relatively low total surface area of said opposing surfaces.
Claim 2
Dependent Claim
194 words
Apparatus for joining two or more sheets, at least one of which contains a thermoplastic material, comprising: a. an ultrasonic electro-acoustic converter; b. a resonator connected to said converter and having a working surface; c. anvil means having surfaces for opposing and cooperating with said working surface so that energy will be transmitted to said sheets by said resonator for producing welds in those portions of said sheets placed between said working surface and said opposing surfaces, wherein the total surface area of said opposing surfaces varies during operation of said apparatus; d. means for advancing the sheet-like elements to be joined between said resonator and said anvil means in contact with said working surface and said opposing surfaces; e. means for modifying the total amount of energy transmitted by the resonator to sAid sheets; and f. control means operatively connectd to said modifying means so that energy will be transmitted by said resonator to said sheets at at least two different rates, a relatively high rate for a relatively high total surface area of said opposing surfaces and a relatively low rate for a relatively low total surface area of said opposing surfaces.
Claim 3
Dependent Claim
37 words
The apparatus as described in claim 1 wherein said modifying means comprises a fluid pressure actuator for urging said resonator toward said anvil means and said control means comprises means for modifying the pressure of said actuator.
Claim 4
Dependent Claim
31 words
The apparatus as described in claim 2 wherein said control means comprises: a. a pressure control valve operatively connected to said actuator; and b. cam means for actuating said control valve.
Claim 5
Dependent Claim
57 words
The apparatus as described in claim 1 wherein said modifying means comprises a source of electrical energy coupled to said converter for energizing said converter and causing said resonator to resonate at a velocity determined by the electrical signal applied to said converter, and said control means comprises means for controlling the signal applied to said converter.
Claim 6
Dependent Claim
45 words
The apparatus as described in claim 1 wherein said control means are effective to control said modifying means so that the energy transmitted by said resonator to said sheets is at a rate which is proportional to the total surface area of said opposing surfaces.
Claim 7
Dependent Claim
37 words
The apparatus as described in claim 5 wherein said modifying means comprises a fluid pressure actuator for urging said resonator toward said anvil means and said control means comprises means for modifying the pressure of said actuator.
Claim 8
Dependent Claim
32 words
The apparatus as described in claim 6 wherein said control means comprises: a. a modulating pressure control valve operatively connected to said actuator; and b. cam means for actuating said control means.
Claim 9
Dependent Claim
57 words
The apparatus as described in claim 2 wherein said modifying means comprises a source of electrical energy coupled to said converter for energizing said converter and causing said resonator to resonate at a velocity determined by the electrical signal applied to said converter, and said control means comprises means for controlling the signal applied to said converter.
Claim 10
Dependent Claim
39 words
The apparatus as described in claim 8 wherein said control means comprises: a. an adjustable transformer including a movable tap which is effective to vary the signal applied to said converter; and b. a cam for moving said tap.
References Cited (Backward Citations)
US3562041A
Cited
US3733238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |