Patent US6749418B2 successfully refreshed from Google Patents.
US6749418B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triple sheet thermoforming apparatus
Assignee: Nextreme LLC
•
Filing: 2001-07-05
•
Granted: 2004-06-15
•
Expires: 2021-07-05
Abstract
Abstract A thermoforming machine for manufacturing triple sheet thermoplastic articles is disclosed. The thermoforming machine comprises three controllable ovens for heating three sheets to a heat deformable temperature, three shape giving molds for separately thermoforming each sheet in succession, and forging-like means to compress the three thermoformed sheets into a unitary article. The three sheets are thermoformed and compressed together in a form station comprising upper and lower platens. Acting with the upper platen is a mold shuttle system for moving two of three molds into position relative the thermoforming and forging-like operations of the apparatus.
Inventors
- 👤 Scott A. W. Muirhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:24
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/16; B29C51/165; B29C51/26; B29C51/266; B29C51/267; B29C65/00; B29C65/02; B29C65/022; B29C65/028; B29C65/78; B29C65/7858; B29C65/7861; B29C65/7879; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/50; B29C66/51; B29C66/54; B29C66/543; B29C66/545; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B65; B65D; B65D19/00; B65D19/0002; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B65D19/0014; B65D19/0018; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822; B29C2791/00; B29C2791/001; B29C2791/004; B29C2791/006; B29C51/10; B29C51/12; B29C65/14; B29C65/1403; B29C65/1412; B29C66/70; B29C66/71; B29C66/73; B29C66/735; B29C66/7352; B29C66/73521; B29C66/82; B29C66/824; B29C66/8242; B29C66/82421; B29L; B29L2031/00; B29L2031/712; B29L2031/7172; B29L2031/7178; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00084; B65D2519/00104; B65D2519/00119; B65D2519/00139; B65D2519/00258; B65D2519/00283; B65D2519/00288; B65D2519/00293; B65D2519/00303; B65D2519/00313; B65D2519/00318; B65D2519/00323; B65D2519/00328; B65D2519/00333; B65D2519/00338; B65D2519/00358; B65D2519/00398; B65D2519/00402; B65D2519/00407; B65D2519/00412; B65D2519/00432; B65D2519/00447; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00562; B65D2519/00736; B65D2519/00935; B65D2519/0094
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
Apparatus for differential pressure forming a single article from three heat deformable thermoplastic sheets comprising: four work stations designated one, two, three and four positioned in spaced relation in a circular arrangement, a frame supporting said work stations, said work stations one, two and three including an oven for heating the thermoplastic sheets to a thermoformable temperature, said work station four including opposed platens movable vertically between open and closed positions, an indexing wheel rotatably supported surrounding said work stations, said indexing wheel including four clamp frames movable with said indexing wheel into spaced relations with said four work stations respectively, and drive means connected to said indexing wheel for rotating said indexing wheel to advance the three thermoplastic sheets secured to said clamp frames to said work stations one, two, and three for heating and to said work station four for molding each of the three heated thermoplastic sheets into a preselected configuration and fusing the molded sheets together in overlying relation to form a unitary thermoplastic article.
Claim 2
Dependent Claim
169 words
Apparatus for differential pressure forming a single article from three heat deformable thermoplastic sheets comprising: four work stations designated one, two, three and four positioned in spaced relation in a circular arrangement, a frame supporting said work stations, said work stations one, two and three including an oven for heating the thermoplastic sheets to a thermoformable temperature, said work station four including opposed platens movable vertically between open and closed positions, an indexing wheel rotatably supported surrounding said work stations, said indexing wheel including four clamp frames movable with said indexing wheel into spaced relations with said four work stations respectively, and drive means connected to said indexing wheel for rotating said indexing wheel to advance the three thermoplastic sheets secured to said clamp frames to said work stations one, two, and three for heating and to said work station four for molding each of the three heated thermoplastic sheets into a preselected configuration and fusing the molded sheets together in overlying relation to form a unitary thermoplastic article.
Claim 3
Dependent Claim
319 words
Apparatus for thermoform molding three thermoplastic sheets to form a triple sheet molded article comprising: a work station, three thermoforming molds designated one, two, and three supported on said work station for molding three thermoplastic sheets respectively, each of said three thermoforming molds having an oven for heating said three thermoplastic sheets to a thermoformable temperature, a slide assembly mounted on said work station for independently moving two molds in overlying relation into and out of a fixed position on said work station for molding the thermoplastic sheets, a first platen and a second platen positioned in overlying spaced relation on said work station for independent movement between open and closed positions, said first platen receiving mold one for movement into compressed relation with sheet one, said second platen slidably receiving molds two and three in succession for movement into compressed relation with sheets two and three in succession respectively, said first platen with said mold one positioned thereon movable to a closed position into contact with sheet one to mold sheet one into a preselected configuration, said second platen with said mold two positioned thereon movable to a closed position into contact with sheet two to mold sheet two into a preselected configuration, said first and second platen with molded sheets one and two thereon movable into compressed force together molded sheets one and two to form a twin sheet molded sub-assembly, said first retaining the twin sheet molded sub-assembly with said second platen slidably exchanging mold two with mold three, said second platen with said mold three positioned thereon movable to a closed position into contact with sheet three to mold sheet three into a preselected configuration, and said first platen carrying the twin sheet molded sub-assembly into compressed relation with said second platen carrying the molded sheet three to fuse molded sheet three to the twin sheet molded article to form a triple sheet molded article.
Claim 4
Dependent Claim
319 words
Apparatus for thermoform molding three thermoplastic sheets to form a triple sheet molded article comprising: a work station, three thermoforming molds designated one, two, and three supported on said work station for molding three thermoplastic sheets respectively, each of said three thermoforming molds having an oven for heating said three thermoplastic sheets to a thermoformable temperature, a slide assembly mounted on said work station for independently moving two molds in overlying relation into and out of a fixed position on said work station for molding the thermoplastic sheets, a first platen and a second platen positioned in overlying spaced relation on said work station for independent movement between open and closed positions, said first platen receiving mold one for movement into compressed relation with sheet one, said second platen slidably receiving molds two and three in succession for movement into compressed relation with sheets two and three in succession respectively, said first platen with said mold one positioned thereon movable to a closed position into contact with sheet one to mold sheet one into a preselected configuration, said second platen with said mold two positioned thereon movable to a closed position into contact with sheet two to mold sheet two into a preselected configuration, said first and second platen with molded sheets one and two thereon movable into compressed force together molded sheets one and two to form a twin sheet molded sub-assembly, said first retaining the twin sheet molded sub-assembly with said second platen slidably exchanging mold two with mold three, said second platen with said mold three positioned thereon movable to a closed position into contact with sheet three to mold sheet three into a preselected configuration, and said first platen carrying the twin sheet molded sub-assembly into compressed relation with said second platen carrying the molded sheet three to fuse molded sheet three to the twin sheet molded article to form a triple sheet molded article.
Claim 5
Dependent Claim
242 words
A thermoforming machine comprising: a machine frame; three ovens spaced upon the machine frame; at least three clamp frames operable to convey three sheets in succession through the three ovens and a form station; the form station has a lower platen and an upper platen; the lower platen supports a first mold; the upper platen is connected to a mold shuttle system, the mold shuttle system holds a second mold and a third mold and is operable to alternately deliver the second mold and the third mold into a supporting position upon the second platen; the lower platen is operable to carry the first mold from an open position to a first closed position to thermoform a first sheet, repeatedly carry the thermoformed first sheet to the open position, compress the first mold against the second mold at a second closed position, and compress the first mold against the third mold at a third closed position; and the upper platen is operable from an open position to interface with the mold shuttle system, to receive and carry the second mold to a first closed position to thermoform a second sheet, to receive and carry the third mold to a second closed position to thermoform a third sheet, and remain in the first and second closed positions when the lower platen compresses the first mold against the second mold in the first closed position and the third mold in the second closed position.
Claim 6
Dependent Claim
242 words
A thermoforming machine comprising: a machine frame; three ovens spaced upon the machine frame; at least three clamp frames operable to convey three sheets in succession through the three ovens and a form station; the form station has a lower platen and an upper platen; the lower platen supports a first mold; the upper platen is connected to a mold shuttle system, the mold shuttle system holds a second mold and a third mold and is operable to alternately deliver the second mold and the third mold into a supporting position upon the second platen; the lower platen is operable to carry the first mold from an open position to a first closed position to thermoform a first sheet, repeatedly carry the thermoformed first sheet to the open position, compress the first mold against the second mold at a second closed position, and compress the first mold against the third mold at a third closed position; and the upper platen is operable from an open position to interface with the mold shuttle system, to receive and carry the second mold to a first closed position to thermoform a second sheet, to receive and carry the third mold to a second closed position to thermoform a third sheet, and remain in the first and second closed positions when the lower platen compresses the first mold against the second mold in the first closed position and the third mold in the second closed position.
Claim 7
Dependent Claim
64 words
The thermoforming machine of claim 3 further comprising: a bolster plate beneath the first mold; between the bolster plate and the lower platen a plurality of vertically acting actuators; and a controller means causing the actuators to incrementally move the bolster plate vertically compressing the first mold against the second mold in the first closed position and the mold in the second closed position.
Claim 8
Dependent Claim
134 words
A thermoforming apparatus comprising: a frame; at least three spaced apart ovens for heating thermoplastic sheets to a thermoformable temperature; a lower platen supported for vertical movement upon the frame; a first mold mounted on the lower platen; an upper platen supported for vertical movement upon the frame above the lower platen; a mold shuttle system supported upon the frame acting with the upper platen; a second and third mold mounted for horizontal movement on the mold shuttle system; and an controllable actuation means selectively moving the second or third mold horizontally on the mold shuttle system into an engaged position upon the upper platen for vertical movement thereon, wherein the first mold, second mold, and third mold are operable to fuse said thermoplastic sheets received from said at least three spaced apart ovens.
Claim 9
Dependent Claim
134 words
A thermoforming apparatus comprising: a frame; at least three spaced apart ovens for heating thermoplastic sheets to a thermoformable temperature; a lower platen supported for vertical movement upon the frame; a first mold mounted on the lower platen; an upper platen supported for vertical movement upon the frame above the lower platen; a mold shuttle system supported upon the frame acting with the upper platen; a second and third mold mounted for horizontal movement on the mold shuttle system; and an controllable actuation means selectively moving the second or third mold horizontally on the mold shuttle system into an engaged position upon the upper platen for vertical movement thereon, wherein the first mold, second mold, and third mold are operable to fuse said thermoplastic sheets received from said at least three spaced apart ovens.
Claim 10
Dependent Claim
125 words
The triple sheet form station of claim 5 further comprising: a plurality of upper gear posts supported upon the frame extending vertically adjacent the upper platen; engaging the upper gear posts upper platen gears precisely driven by at least one first motor for selective vertical movement of the upper platen; a plurality of gear posts supported upon the frame extending vertically adjacent the lower platen below the upper gear posts; engaging the lower gear posts lower platen gears precisely driven by at least one second motor for selective vertical movement of the lower platen below the upper platen; and a controller means for selectively controlling the first and second motors for independent and simultaneous precise movement of the upper and lower platens upon the frame.
Claim 11
Dependent Claim
154 words
A thermoform tooling apparatus comprising: a first oven operable to heat a first thermoplastic sheet; a second oven being spaced apart from said first oven, said second oven operable to heat a second thermoplastic sheet; a third oven being spaced apart from said first and second ovens, said third oven operable to heat a third thermoplastic sheet; a work station being spaced apart from said first, second, and third ovens, said work station having a first platen and a second platen movable relative to each other between a first position and a second position; a drive assembly supporting each of said first, second, and third thermoplastic sheets, said drive assembly operable to position said first, second, and third thermoplastic sheets within said first, second, and third ovens, respectively, and further operable to deliver said first, second, and third thermoplastic sheets to said work station for fusing said first, second, and third thermoplastic sheets together.
Claim 12
Dependent Claim
154 words
A thermoform tooling apparatus comprising: a first oven operable to heat a first thermoplastic sheet; a second oven being spaced apart from said first oven, said second oven operable to heat a second thermoplastic sheet; a third oven being spaced apart from said first and second ovens, said third oven operable to heat a third thermoplastic sheet; a work station being spaced apart from said first, second, and third ovens, said work station having a first platen and a second platen movable relative to each other between a first position and a second position; a drive assembly supporting each of said first, second, and third thermoplastic sheets, said drive assembly operable to position said first, second, and third thermoplastic sheets within said first, second, and third ovens, respectively, and further operable to deliver said first, second, and third thermoplastic sheets to said work station for fusing said first, second, and third thermoplastic sheets together.
Claim 13
Dependent Claim
45 words
The thermoform tooling apparatus according to claim 7 wherein said drive assembly comprises: an indexing wheel having a plurality of frames for supporting said first, second, and third thermoplastic sheets; and a drive device operably coupled with said indexing wheel for driving said indexing wheel.
Claim 14
Dependent Claim
73 words
The thermoform tooling apparatus according to claim 7 , further comprising: a first mold mounted on the first platen; a mold shuttle system operably coupled with the second platen; a second and third mold mounted for horizontal movement on the mold shuttle system; and an controllable actuation means selectively moving the second or third mold horizontally on the mold shuttle system into an engaged position upon the second platen for vertical movement thereon.
References Cited (Backward Citations)
US3398434A
Cited
US3597799A
Cited
US3583036A
Cited
US3779687A
Cited
US3695188A
Cited
US3702100A
Cited
US3783078A
Cited
US3919445A
Cited
US3919446A
Cited
US3919382A
Cited
US3867088A
Cited
US3787158A
Cited
US3868209A
Cited
US3925140A
Cited
US4013021A
Cited
US3964400A
Cited
US4079232A
Cited
US4101252A
Cited
US4133270A
Cited
US4070839A
Cited
US4113909A
Cited
US4164389A
Cited
US4164387A
Cited
US4377377A
Cited
US4158539A
Cited
US4287836A
Cited
US4194663A
Cited
US4244915A
Cited
US4348442A
Cited
US4255382A
Cited
US4507348A
Cited
US4555381A
Cited
US4488496A
Cited
US4428306A
Cited
US4531901A
Cited
US4464329A
Cited
US4513048A
Cited
US4509909A
Cited
US4509432A
Cited
US4846077A
Cited
US4666544A
Cited
US5283029A
Cited
US4649007A
Cited
US4608009A
Cited
US4606278A
Cited
US4907515A
Cited
US4742781A
Cited
US4636348A
Cited
US4600376A
Cited
US5007225A
Cited
US5071603A
Cited
US5555820A
Cited
US5042396A
Cited
US5197395A
Cited
US4969812A
Cited
US5030501A
Cited
US5088418A
Cited
US5108529A
Cited
US5226373A
Cited
US5164211A
Cited
US5117762A
Cited
US5404829A
Cited
US5255613A
Cited
US5283028A
Cited
US5046434A
Cited
US5885691A
Cited
US5635129A
Cited
US5624630A
Cited
US5391251A
Cited
US5143778A
Cited
US5168817A
Cited
US5123359A
Cited
US5123541A
Cited
US5167969A
Cited
US5329861A
Cited
US5351629A
Cited
US5413052A
Cited
US5197396A
Cited
US5156782A
Cited
US5225213A
Cited
US5635306A
Cited
US5407632A
Cited
US5337681A
Cited
US5367961A
Cited
US5367960A
Cited
US5996508A
Cited
US5408937A
Cited
US5470641A
Cited
US5401347A
Cited
US5390467A
Cited
US5351627A
Cited
US5351628A
Cited
US5329862A
Cited
US5624622A
Cited
US5778801A
Cited
US5687652A
Cited
US5402735A
Cited
US5527585A
Cited
US5535668A
Cited
US5427732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-06-15 | 2007-12-15 | 2008-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-06-15 | 2011-12-15 | 2012-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-06-15 | 2015-12-15 | 2016-06-15 | $7700.00 | Window Closed / Lapsed |