US3657033A
Expired / Lapsed
US
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Method and apparatus for continuous cutting and joining of thermoplastic sheet material
Assignee: Ultrasonic Systems Inc
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Filing: 1969-03-26
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Granted: 1972-04-18
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Expires: 1989-03-26
Abstract
Abstract A method and means for continuously cutting and sealing thin gauge thermoplastic sheet material using kinetic energy produced by a horn of reduced sealing area.
Inventors
- 👤 Thomas B Sager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:23
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7443; B29C65/02; B29C65/08; B29C65/081; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/133; B29C66/137; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81419; B29C66/81421; B29C66/81422; B29C66/83; B29C66/836; B65; B65B; B65B51/00; B65B51/10; B65B51/22; B65B51/225; B29C66/71; B29C66/81417; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A method of ultrasonically simultaneously sealing and cutting thin thermoplastic sheets on a continuous operating basis with the aid of a blade having a radius contacting edge, comprising the steps of: A. providing an anvil having an inclined surface, B. overlapping said sheets in contact with each other on said inclined surface, C. positioning said blade such that said radius contacting edge applies a small compressive force to said sheets along a line traversing the area of overlap, D. moving said plastic sheets and said anvil and said blade relative to each other, E. vibrating the contacting edge of said blade at an ultrasonic rate to apply recurring force to said sheets with said recurring force having a combination of impact action by a substantial component perpendicular to said contacting edge and shear action having a substantial component parallel to said inclined surface of said anvil to generate sufficient kinetic energy at the area of contact with said blade to simultaneously cut and seal said sheets as they are moved relative to said blade.
Claim 2
Independent Claim
174 words
A method of ultrasonically simultaneously sealing and cutting thin thermoplastic sheets on a continuous operating basis with the aid of a blade having a radius contacting edge, comprising the steps of: A. providing an anvil having an inclined surface, B. overlapping said sheets in contact with each other on said inclined surface, C. positioning said blade such that said radius contacting edge applies a small compressive force to said sheets along a line traversing the area of overlap, D. moving said plastic sheets and said anvil and said blade relative to each other, E. vibrating the contacting edge of said blade at an ultrasonic rate to apply recurring force to said sheets with said recurring force having a combination of impact action by a substantial component perpendicular to said contacting edge and shear action having a substantial component parallel to said inclined surface of said anvil to generate sufficient kinetic energy at the area of contact with said blade to simultaneously cut and seal said sheets as they are moved relative to said blade.
Claim 3
Dependent Claim
25 words
The method as defined in claim 1, wherein in said moving step said plastic sheets are moved along said inclined surface relative to said blade.
Claim 4
Dependent Claim
24 words
The method as defined in claim 1, wherein in said moving step said anvil and said blade are moved relative to said plastic sheets.
Claim 5
Dependent Claim
175 words
Apparatus for ultrasonically simultaneously sealing and cutting thin thermoplastic sheets on a continuous operating basis comprising A. a blade having a radius contacting edge, B. an anvil having an inclined surface in spaced relation to said blade for a spacing therebetween to receive the everlapping sheets in contact with each other on said inclined surface and said radius contacting edge applying a small compressive force to said sheets along a line traversing the area of overlap as said plastic sheets move along said inclined surface relative to said blade, and C. means for vibrating the contacting edge of said blade at an ultrasonic rate to apply an additional recurring force to said sheets with said recurring force having a combination of impact action by a substantial component perpendicular to said contacting edge and shear action having a substantial component parallel to said inclined surface of said anvil to generate sufficient kinetic energy at the area of contact with said blade to simultaneously cut and seal said sheets as they are moved relative to said blade.
Claim 6
Dependent Claim
175 words
Apparatus for ultrasonically simultaneously sealing and cutting thin thermoplastic sheets on a continuous operating basis comprising A. a blade having a radius contacting edge, B. an anvil having an inclined surface in spaced relation to said blade for a spacing therebetween to receive the everlapping sheets in contact with each other on said inclined surface and said radius contacting edge applying a small compressive force to said sheets along a line traversing the area of overlap as said plastic sheets move along said inclined surface relative to said blade, and C. means for vibrating the contacting edge of said blade at an ultrasonic rate to apply an additional recurring force to said sheets with said recurring force having a combination of impact action by a substantial component perpendicular to said contacting edge and shear action having a substantial component parallel to said inclined surface of said anvil to generate sufficient kinetic energy at the area of contact with said blade to simultaneously cut and seal said sheets as they are moved relative to said blade.
Claim 7
Dependent Claim
34 words
Apparatus as defined in claim 4, wherein said blade has a curvilinear tapered edge adapted to allow for the proper flow of melted plastic which produces the bonding strength necessary to form said seal.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |