Patent US3723224A successfully refreshed from Google Patents.
US3723224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making ribbed synthetic resin boards
Assignee: Seisan Nibon Sha KK
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Filing: 1970-10-14
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Granted: 1973-03-27
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Expires: 1990-10-14
Abstract
Abstract A method and apparatus for producing synthetic resin boards having a pair of parallel synthetic resin film layers connected, but spaced apart by ribbing providing hollow spaces between said film layers and which boards are formed by extruding synthetic resin pass a fluted rotating roll and from there pass two opposing nozzles which apply the film layers to the ribbing from said fluted roll and including means for stretching the ribbing in directions at right angles to the direction of movement of the ribbing to give the ribbing walls the desired thickness and height.
Inventors
- 👤 R Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C48/00; B29C48/03; B29C48/07; B29C48/09; B29C48/11; B29C48/13; B29C48/25; B29C48/30; B29C48/305; B29C48/35; B29C53/00; B29C53/22; B29C53/24; B29L; B29L2028/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
194 words
An apparatus for manufacturing synthetic resin boards comprising a body having a chamber and slot above said chamber, a fluted roll rotatably mounted in said chamber and capable or continuously extruding resin in the form of a ribbing through said slot, means having a first nozzle positioned on one side of the slot and capable of extruding a resin film layer forming a layer wall adhering on one side of the ribbing being extruded from said slot, adjustable oppositely driven rotary stretching rolls positioned above said nozzle for receiving said ribbing and transferring said ribbing upward and capable of stretching the length of said ribbing to the desired extent upon adjustment between the axis of said rolls, adjustably mounted doctor knives touching the upper surface of said rolls for finally adjusting the ribbing stretched by said rolls to the desired length and tear off said ribbing from said rolls, a second nozzle positioned immediately above said rolls and opposite to said first nozzle, capable of extruding a resin film layer on the other side of said ribbing transferred by said rolls forming a layer wall adhering to the other side of said stretched ribbing.
Claim 2
Independent Claim
194 words
An apparatus for manufacturing synthetic resin boards comprising a body having a chamber and slot above said chamber, a fluted roll rotatably mounted in said chamber and capable or continuously extruding resin in the form of a ribbing through said slot, means having a first nozzle positioned on one side of the slot and capable of extruding a resin film layer forming a layer wall adhering on one side of the ribbing being extruded from said slot, adjustable oppositely driven rotary stretching rolls positioned above said nozzle for receiving said ribbing and transferring said ribbing upward and capable of stretching the length of said ribbing to the desired extent upon adjustment between the axis of said rolls, adjustably mounted doctor knives touching the upper surface of said rolls for finally adjusting the ribbing stretched by said rolls to the desired length and tear off said ribbing from said rolls, a second nozzle positioned immediately above said rolls and opposite to said first nozzle, capable of extruding a resin film layer on the other side of said ribbing transferred by said rolls forming a layer wall adhering to the other side of said stretched ribbing.
Claim 3
Dependent Claim
51 words
An apparatus for manufacturing synthetic resin boards as claimed in claim 1 wherein the axis of said rotary rolls, which transfer said ribbing, are movable in opposed directions to each other whereby the dimensions of said ribbing are stretched and adjusted to obtain the desired wall thickness and the height thereof.
Claim 4
Dependent Claim
77 words
An apparatus for manufacturing synthetic resin boards according to claim 1 including doctor knives having edges which are disposed above said rotary rolls opposite to each other in a spaced relationship and which knives are adjustably mounted to provide a space therebetween, said knives having grooves on the upper surface to prevent the sticking of said ribbing to said edges of said doctor knives as the ribbing is scratched off from the surface of said rotary rolls.
Claim 5
Dependent Claim
35 words
An apparatus for manufacturing synthetic resin boards according to claim 1 including heating means provided for said rotary rolls whereby said rolls can be heated to a temperature necessary for the stretching of said ribbing.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |