US3933571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing apparatus utilizing adjustable jaw portions
Assignee: Donray Products Co
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Filing: 1973-05-21
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Granted: 1976-01-20
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Expires: 1993-05-21
Abstract
Abstract The specification and drawings disclose a method and apparatus of forming foam plastic envelopes by simultaneously engaging two juxtaposed sheets of foam plastic with at least three pairs of opposed jaw members positioned to fully define three marginal edges of an envelope. As shown, the jaw members are positioned in a generally U-shaped pattern so that each pair of jaws completely defines a separate marginal edge. The preferred apparatus of the invention includes first and second opposed platens mounted for movement between a first position in which they are spaced a substantial distance apart and a second position wherein they are relatively closely spaced. Each platen carries at least three jaws including two elongated, spaced, side-by-side jaws and one intermediate jaw which extends transversely between the side-by-side jaws. The jaws on each platen are aligned with corresponding jaws on the opposed platen so that upon relative movement of the platens to the second position, the jaws come into cooperating relationship. Additionally, means are provided for permitting adjustment longitudinally of the side-by-side jaws.
Inventors
- 👤 Charles E. Studen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:46
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/84; B29C66/841; B29C66/8412; B29C65/00; B29C65/02; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/45; B29C66/70; B29C66/72; B29C66/727; B29C66/81; B29C66/816; B29C66/8167; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C65/08; B29C65/18; B29C66/004; B29C66/0042; B29C66/0044; B29C66/812; B29C66/8122; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
231 words
Apparatus for forming sealed foam plastic envelopes of a given desired size comprising: a. a pair of platens having opposed faces; b. support means for supporting said platens with their opposed faces generally parallel and in alignment; c. power means for producing relative movement between said platens to permit them to be selectively moved from a first position wherein their opposed faces are spaced a substantial distance apart to a second position wherein their opposed faces are relatively closely spaced; d. adjustable jaw assembly means carried on each of said platens, each of said jaw assembly means including at least three margin defining jaw portions fixed in desired relation on each platen, the jaw portions including one pair of elongated jaw portions in side-by-side parallel alignment on each platen and arranged to mate in face-to-face relation when the platens are moved to the second position, and an intermediate jaw portion mounted on each platen in face-to-face relation with its opposing intermediate jaw portion and extending between the elongated jaw portions to define therewith opposed co-operating jaw assemblies of generally U-shaped and desired size; e. adjusting means for permitting the spacing between the parallel elongated jaw portions to be selectively varied for envelopes of different size; and, f. means for causing the jaw portions to impart energy to plastic sheets positioned therebetween to bond said sheets into an envelope of desired size.
Claim 2
Dependent Claim
231 words
Apparatus for forming sealed foam plastic envelopes of a given desired size comprising: a. a pair of platens having opposed faces; b. support means for supporting said platens with their opposed faces generally parallel and in alignment; c. power means for producing relative movement between said platens to permit them to be selectively moved from a first position wherein their opposed faces are spaced a substantial distance apart to a second position wherein their opposed faces are relatively closely spaced; d. adjustable jaw assembly means carried on each of said platens, each of said jaw assembly means including at least three margin defining jaw portions fixed in desired relation on each platen, the jaw portions including one pair of elongated jaw portions in side-by-side parallel alignment on each platen and arranged to mate in face-to-face relation when the platens are moved to the second position, and an intermediate jaw portion mounted on each platen in face-to-face relation with its opposing intermediate jaw portion and extending between the elongated jaw portions to define therewith opposed co-operating jaw assemblies of generally U-shaped and desired size; e. adjusting means for permitting the spacing between the parallel elongated jaw portions to be selectively varied for envelopes of different size; and, f. means for causing the jaw portions to impart energy to plastic sheets positioned therebetween to bond said sheets into an envelope of desired size.
Claim 3
Dependent Claim
24 words
The apparatus as defined in claim 1 wherein said platens are mounted horizontally and wherein said power means moves one of said platens vertically.
Claim 4
Dependent Claim
21 words
The apparatus as defined in claim 1 wherein said platens have an access opening at a location adjacent said jaw members.
Claim 5
Dependent Claim
200 words
A foam envelope margin sealing apparatus comprising: first and second opposed platens; power means for producing relative movement between said platens to move them to a first position wherein they are spaced a substantial distance apart and a second position wherein they are closely spaced; a first set of jaw defining jaw portions carried on said first platen and including a first pair of generally parallel, elongated jaw portions in spaced side-by-side relationship and a first intermediate jaw portion extending transversely between said first pair; a second set of jaw defining jaw portions carried on said second platen in opposing relation to said first set of jaw defining jaw portions and including a second pair of generally parallel, elongated jaw portions in spaced, side-by-side relationship and a second intermediate jaw portion extending transversely between said second pair; said first and second pairs of parallel jaw portions being adjustably mounted on their respective platens in a manner to permit lengthening or shortening their relative spacing; and said first and second intermediate jaw portions being connected to their respective platens in a manner to permit them to be removed from said platens or shifted longitudinally along said pairs of parallel jaw portions.
Claim 6
Dependent Claim
200 words
A foam envelope margin sealing apparatus comprising: first and second opposed platens; power means for producing relative movement between said platens to move them to a first position wherein they are spaced a substantial distance apart and a second position wherein they are closely spaced; a first set of jaw defining jaw portions carried on said first platen and including a first pair of generally parallel, elongated jaw portions in spaced side-by-side relationship and a first intermediate jaw portion extending transversely between said first pair; a second set of jaw defining jaw portions carried on said second platen in opposing relation to said first set of jaw defining jaw portions and including a second pair of generally parallel, elongated jaw portions in spaced, side-by-side relationship and a second intermediate jaw portion extending transversely between said second pair; said first and second pairs of parallel jaw portions being adjustably mounted on their respective platens in a manner to permit lengthening or shortening their relative spacing; and said first and second intermediate jaw portions being connected to their respective platens in a manner to permit them to be removed from said platens or shifted longitudinally along said pairs of parallel jaw portions.
Claim 7
Dependent Claim
160 words
Apparatus for sealing foam plastic sheet material comprising: first and second opposed platens mounted for relative movement between a first position in which they are spaced a substantial distance apart and a second position wherein they are relatively closely spaced; each platen carrying and adjustable jaw assembly including two elongated, spaced side-by-side jaw portions and one intermediate jaw portion extending transversely between said spaced side-by-side jaw portions; the jaw assembly of each platen being aligned with the jaw assembly of the opposed platen so that upon relative movement of the platens to the second position, the jaw assemblies telescopingly come into co-operating relationship with their sealing surfaces in opposing face-to-face relationship, first means for permitting spacing between the side-by-side jaw portions to be readily varied; and, second means for permitting the position of said intermediate jaw portions to be adjusted longitudinally of said side-by-side jaw members such that the length of margin defining sealed portions of envelopes can be varied.
Claim 8
Dependent Claim
160 words
Apparatus for sealing foam plastic sheet material comprising: first and second opposed platens mounted for relative movement between a first position in which they are spaced a substantial distance apart and a second position wherein they are relatively closely spaced; each platen carrying and adjustable jaw assembly including two elongated, spaced side-by-side jaw portions and one intermediate jaw portion extending transversely between said spaced side-by-side jaw portions; the jaw assembly of each platen being aligned with the jaw assembly of the opposed platen so that upon relative movement of the platens to the second position, the jaw assemblies telescopingly come into co-operating relationship with their sealing surfaces in opposing face-to-face relationship, first means for permitting spacing between the side-by-side jaw portions to be readily varied; and, second means for permitting the position of said intermediate jaw portions to be adjusted longitudinally of said side-by-side jaw members such that the length of margin defining sealed portions of envelopes can be varied.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |