US4124342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the gap between lips of a die for extruding a plastic sheet material
Assignee: Toray Industries Inc
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Filing: 1976-06-07
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Granted: 1978-11-07
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Expires: 1996-06-07
Abstract
Abstract An apparatus for adjusting the gap between lips of a die for extruding a plastic sheet material. A pair of flat plates spaced from each other have a plurality of bolts for controlling the gap. The operational adjustment of each bolt is generated as an electric signal, and this electric signal is added with reference to all the bolts to distribute the gaps between the die lips. Each adjustment is changed so that the distribution of the gap between the die lips acquires a predetermined form to thereby determine the necessary amount of adjustment of each bolt.
Inventors
- 👤 Takeaki Akatsuka
- 👤 Katsuichi Kitagawa
- 👤 Hiroyoshi Amo
- 👤 Osamu Mita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:54
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/03; B29C48/07; B29C48/08; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92114; B29C2948/92152; B29C2948/92504; B29C2948/92571; B29C2948/92609; B29C2948/92647; B29C2948/92819; B29C2948/92857; B29C2948/92904
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
236 words
An apparatus for indicating the necessary amount of adjustment of a bolt, while controlling a gap between the lips of a die for extruding a plastic material, said gap being formed between a pair of die plates having a plurality n of adjusting bolts K 1 , K 2 , K 3 - - - K n outside one or both of said plates, which apparatus comprises a calculator device having a setting means adjustable to simulate the setting X 1 , X 2 , X 3 - - - X n of the transversely spaced bolts K 1 , K 2 , K 3 - - - K n and their adjustment; a means for generating a y-output Y 1 , Y 2 , Y 3 - - - Y n from the setting means of the cumulative effect of the settings X 1 , X 2 , X 3 - - - X n , the y-output approximating the gap width at each individual bolt K; means for generating a z-output from the setting means of the contribution on the y-output Y k at any bolt K of the settings X k+1 , X k+2 and X k+3 ; and a means for measuring the actual gap width at each bolt K, so as to adjust said bolts by reference to the actual gap width and the effect of subsequent adjustment of the bolts.
Claim 2
Independent Claim
236 words
An apparatus for indicating the necessary amount of adjustment of a bolt, while controlling a gap between the lips of a die for extruding a plastic material, said gap being formed between a pair of die plates having a plurality n of adjusting bolts K 1 , K 2 , K 3 - - - K n outside one or both of said plates, which apparatus comprises a calculator device having a setting means adjustable to simulate the setting X 1 , X 2 , X 3 - - - X n of the transversely spaced bolts K 1 , K 2 , K 3 - - - K n and their adjustment; a means for generating a y-output Y 1 , Y 2 , Y 3 - - - Y n from the setting means of the cumulative effect of the settings X 1 , X 2 , X 3 - - - X n , the y-output approximating the gap width at each individual bolt K; means for generating a z-output from the setting means of the contribution on the y-output Y k at any bolt K of the settings X k+1 , X k+2 and X k+3 ; and a means for measuring the actual gap width at each bolt K, so as to adjust said bolts by reference to the actual gap width and the effect of subsequent adjustment of the bolts.
Claim 3
Dependent Claim
66 words
An apparatus according to claim 1, wherein the means for generating the y-output includes a means for adding the contribution of the y-output Y k at any bolt K of the settings X k-3 , X k-2 , X 1 , X k+1 , X k+2 X k+3 and an additional settings of bolts to either side of the bolts to which the bolt settings pertain.
Claim 4
Dependent Claim
70 words
An apparatus according to claim 1, wherein said means for generating the z-output produces the y-output of the contribution at any bolt K of the setting X k+1 , X k+2 and X k+3 and a t-output of the contribution at any bolt K of the settings X k-3 , X k-2 , X k-1 and X k , and including means for switching from the y-output to the t-output.
Claim 5
Dependent Claim
35 words
An apparatus according to claim 1, including a visual display means, and at least one of said means for generating the y-output and said means for generating the z-output being connected to said visual display.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 1, wherein the setting means are provided by a plurality of potentiometers individually adjustable so as to enable a desired gap width distribution to be approximated.
Claim 7
Dependent Claim
93 words
An apparatus according to claim 1, wherein said means for generating the y-output comprises groups of switch contacts, each group containing one contact for each bolt of said die, a plurality of fixed resistors, one for each group for apportioning the contribution on the first output Y k of at least the settings X k+3 , X k-2 , X k1 , X k , X k+1 , X k+2 and X k+3 , respectively and means for adding the output of the fixed resistors of the respective groups to generate the y-output.
Claim 8
Dependent Claim
29 words
An apparatus according to claim 1, wherein said means for measuring the actual gap width is a sensor adapted to measure the width of the gap between the lips.
Claim 9
Dependent Claim
32 words
An apparatus according to claim 1, wherein said means for measuring the actual gap width is a sensor adapted to detect the thickness of a sheet material extruded from between the lips.
Claim 10
Independent Claim
234 words
An apparatus for indicating the necessary amount of adjustment of a bolt, upon controlling a gap between lips of a die for extruding a plastic material, said gap being formed between a pair of die plates having a plurality n of adjusting bolts K 1 , K 2 , K 3 - - - - K n outside one or both of said plates, which apparatus comprises a calculator device having a setting means adjustable to simulate the settings X 1 X 2 , X 3 - - - X n of the transversely spaced bolts K 1 , K 2 , - - - K n and their adjustment; a means for generating a y-output Y 1 , Y 2 , Y 3 - - - Y n , from the setting means of the cumulative effect of the settings X 1 , X 2 , X 3 - - - X n , the y-output approximating the gap width at each individual bolt K; means for generating a t-output from the setting means of the contribution on the y-output Y k at any bolt K of the settings X k+1 , X k+2 and X k+3 ; and a means for measuring the actual gap width at each bolt K, so as to adjust said bolts by reference to the actual gap width and the effect of subsequent adjustment of the bolts.
Claim 11
Independent Claim
234 words
An apparatus for indicating the necessary amount of adjustment of a bolt, upon controlling a gap between lips of a die for extruding a plastic material, said gap being formed between a pair of die plates having a plurality n of adjusting bolts K 1 , K 2 , K 3 - - - - K n outside one or both of said plates, which apparatus comprises a calculator device having a setting means adjustable to simulate the settings X 1 X 2 , X 3 - - - X n of the transversely spaced bolts K 1 , K 2 , - - - K n and their adjustment; a means for generating a y-output Y 1 , Y 2 , Y 3 - - - Y n , from the setting means of the cumulative effect of the settings X 1 , X 2 , X 3 - - - X n , the y-output approximating the gap width at each individual bolt K; means for generating a t-output from the setting means of the contribution on the y-output Y k at any bolt K of the settings X k+1 , X k+2 and X k+3 ; and a means for measuring the actual gap width at each bolt K, so as to adjust said bolts by reference to the actual gap width and the effect of subsequent adjustment of the bolts.
Claim 12
Dependent Claim
66 words
An apparatus according to claim 9, wherein said means for generating the y-output includes a means for adding the contribution of the y-output Y k at any bolt K of the settings X k-3 , X k-2 , X k-1 , X k+1 , X k+2 , X k+3 and additional settings of bolts to either side of the bolts to which the bolt settings pertain.
Claim 13
Dependent Claim
35 words
An apparatus according to claim 9, including a visual display means, at least one of said means for generating the y-output and said means for generating the z-output being connected to said visual display means.
Claim 14
Dependent Claim
31 words
An apparatus according to claim 9, wherein the setting means are provided by a plurality of potentiometers individually adjustable so as to enable a desired gap width distribution to be approximated.
Claim 15
Dependent Claim
95 words
An apparatus according to claim 9, wherein said means for generating the y-output comprises groups of switch contacts, each group containing one contact for each bolt of the die, a plurality of fixed resistors, one for each group for apportioning the contribution on the first output Y k of at least the settings X k-3 , X k-2 , X k-1 , X k , X k+1 , X k+2 , and X k+3 , respectively and a means for adding the output of the fixed resistors of the respective groups to generate the y-output.
Claim 16
Dependent Claim
29 words
An apparatus according to claim 9, wherein the means for measuring the actual gap width is a sensor adapted to measure the width of the gap between the lips.
Claim 17
Dependent Claim
32 words
An apparatus according to claim 9, wherein the means for measuring the actual gap width is a sensor adapted to detect the thickness of a sheet material extruded from between the lips.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |