US3787257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to seal two materials to each other and a device to carry out the method
Assignee: Akerlund and Rausing AB
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Filing: 1971-11-30
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Granted: 1974-01-22
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Expires: 1991-11-30
Abstract
Abstract Two sheets of packaging material at least one of which has a plastic surface on at least one side are sealed together by moving them past a vibrating heater block which vibrates in a plane normal to the plane of the sheets. The sheets are located between the vibrating heater block and a support for these.
Inventors
- 👤 J Akerlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:24
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/06; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/13; B29C66/131; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4326; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B31; B31B; B31B50/00; B31B50/60; B31B50/64; B65; B65B; B65B7/00; B65B7/16; B65B7/162; B65B7/164; B29C66/1122; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/81; B29C66/818; B29C66/90; B29C66/95; B29C66/951; B29C66/9512; B29C66/9513; B29C66/9517; B29L; B29L2031/00; B29L2031/712; B29L2031/7162
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A method for sealing together the surfaces of two sheets of packaging material, at least one of said sheets having a heat sealable surface on the side to which the other sheet is to be sealed comprising moving the two sheets in contacting planar relation past a heater means vibrating at a frequency of from about 120 to about 20,000 oscillations per minute and at right angles to the plane of said sheets for applying vibrating pressure and heat to one side of said contacting sheets as they pass thereby while supporting said sheets on the side opposed to said vibrating heating means.
Claim 2
Independent Claim
103 words
A method for sealing together the surfaces of two sheets of packaging material, at least one of said sheets having a heat sealable surface on the side to which the other sheet is to be sealed comprising moving the two sheets in contacting planar relation past a heater means vibrating at a frequency of from about 120 to about 20,000 oscillations per minute and at right angles to the plane of said sheets for applying vibrating pressure and heat to one side of said contacting sheets as they pass thereby while supporting said sheets on the side opposed to said vibrating heating means.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1, wherein the amplitude of the vibrations of the heater means is not less than about 0.1 mm.
Claim 4
Dependent Claim
69 words
A method as claimed in claim 1 wherein the frequency of vibration of the heater means is sufficiently high with respect to the longitudinal dimension of the heater means and the rate of movement of said sheets passed the heater means that all areas of the two sheets to be sealed together will be subjected to more than one vibration of the heater means before leaving the heater means.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1 wherein the frequency of vibration of the heater means is from about 4,000 to about 6,000 vibrations per minute.
Claim 6
Dependent Claim
134 words
Apparatus for sealing together the surfaces of two sheets of packaging material, at least one of said sheets having a heat sealable surface on the side to which the other sheet is to be sealed comprising a heater means, means for moving the two sheets of packaging material in contacting planar relation past said heater means, means for vibrating said heater means at a frequency of about 120 to about 20,000 oscillations per minute and at right angles to the plane of said two contacting sheets and support means on that side of said two contacting sheets opposite from said heater means, the distance between said supporting means and said heater means being less than the sum of the amplitude of vibration of said heater means and the thickness of the two contacting sheets.
Claim 7
Dependent Claim
134 words
Apparatus for sealing together the surfaces of two sheets of packaging material, at least one of said sheets having a heat sealable surface on the side to which the other sheet is to be sealed comprising a heater means, means for moving the two sheets of packaging material in contacting planar relation past said heater means, means for vibrating said heater means at a frequency of about 120 to about 20,000 oscillations per minute and at right angles to the plane of said two contacting sheets and support means on that side of said two contacting sheets opposite from said heater means, the distance between said supporting means and said heater means being less than the sum of the amplitude of vibration of said heater means and the thickness of the two contacting sheets.
Claim 8
Dependent Claim
48 words
Apparatus as claimed in claim 5 wherein one of said two sheets compriSes flange-lkke flaps surrounding the top opening of a container and said supporting means supports said flange-like flaps and the other of said two sheets comprises a sealing wafer to be sealed to said flange-like flaps.
Claim 9
Dependent Claim
28 words
Apparatus as claimed in claim 6 in which said supporting means comprises a frame-like structure for supporting said container and includes a surface for supporting said flange-like flaps.
Claim 10
Dependent Claim
27 words
Apparatus as claimed in claim 7 wherein said means for moving the two sheets passed said heater means also moves said frame-like structure passed said heater means.
Claim 11
Dependent Claim
49 words
Apparatus as claimed in claim 7 wherein the supporting surface of said frame-like structure is spaced from the neutral position of said heater means a distance which is less than the sum of the amplitude of vibration of said heater means and the thickness of the two contacting sheets.
Claim 12
Dependent Claim
31 words
Apparatus as claimed in claim 9 wherein the distance between said supporting surface of said frame-like structure and said heater means is substantially equal to the thickness of the two sheets.
Claim 13
Dependent Claim
37 words
Apparatus as claimed in claim 5 wherein said heater means includes a heating block, a supporting plate and insulating means disposed between said heating block and said supporting plate, said vibrating means acting on said supporting plate.
Claim 14
Dependent Claim
31 words
Apparatus as claimed in claim 11 and further comprising a frame and spring means for supporting said heater means on said frame to prevent vibrations from being transmitted to said frame.
Claim 15
Dependent Claim
27 words
Apparatus as claimed in claim 5 wherein said vibrating means imparts a vibration of from about 4,000 to about 6,000 vibrations per minute to said heater means.
Claim 16
Dependent Claim
25 words
Apparatus as claimed in claim 5 wherein said vibrating means produces vibrations of said heater means having an amplitude of not less than 0.1 mm.
Claim 17
Dependent Claim
65 words
Apparatus as claimed in claim 5 wherein said heater means has such a longitudinal dimension and said sheet moving means moves the two sheets of packaging material at such a rate of speed passed said heater means that all areas of the two sheets to be sealed together will be subjected to more than one vibration of the heater means before leaving said heater means.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |