US4375350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming elongated synthetic resin plate or sheet
Assignee: SAKUSHIN KOGYO CO Ltd
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Filing: 1981-12-11
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Granted: 1983-03-01
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Expires: 2001-12-11
Abstract
Abstract An improved apparatus for forming an elongated synthetic resin plate or sheet, is provided. The lower steel belt of the apparatus is placed on a lower board and is intermittently fed by a predetermined distance. Side frames are installed on the lower steel belt, the side frames stretching on both the right and left edges of the lower steel belt in the lengthwise direction thereof. The upper steel belt is disposed between the two side frames, and an upper board is installed on the upper steel belt. Either one of the upper board or the lower board is so constructed as to be movable up and down. The resinous starting material is pressed by the pressing operation of the board which moves up and down via the upper and lower steel belts. The upper and lower boards are divided into a plurality of blocks so as to correspond to the opposing ones, thereby to constitute heating zones having heating means and cooling zones having cooling means.
Inventors
- 👤 Toshio Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/02; B29C67/04; B29C43/00; B29C43/22; B29C43/228; B30; B30B; B30B15/00; B30B15/34; B30B5/00; B30B5/04; B30B5/06; B29C43/32; B29C43/44; B29C43/48; B29C2043/483; B29L; B29L2007/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
201 words
In an apparatus for forming an elongated synthetic resin plate or sheet by supplying a resinous starting material having a predetermined thickness to between an upper steel belt and a lower steel belt, and heating the resinous starting material through the two steel belts while applying pressure, followed by cooling, the improvement wherein said lower steel belt is placed on a lower board and is intermittently fed by a predetermined distance, side frames are installed on the lower steel belt, said side frames stretching on both the right and left edges of the lower steel belt in the lenghwise direction thereof, said upper steel belt is disposed between said two side frames, an upper board is installed on the upper steel belt, either one of the upper board or the lower board is so constructed as to move up and down, the resinous starting material is pressed by the pressing operation of the board which moves up and down via the upper and lower steel belts, and the upper and lower boards are divided into a plurality of blocks so as to correspond to the opposing ones, thereby to constitute heating zones having heating means and cooling zones having cooling means.
Claim 2
Dependent Claim
201 words
In an apparatus for forming an elongated synthetic resin plate or sheet by supplying a resinous starting material having a predetermined thickness to between an upper steel belt and a lower steel belt, and heating the resinous starting material through the two steel belts while applying pressure, followed by cooling, the improvement wherein said lower steel belt is placed on a lower board and is intermittently fed by a predetermined distance, side frames are installed on the lower steel belt, said side frames stretching on both the right and left edges of the lower steel belt in the lenghwise direction thereof, said upper steel belt is disposed between said two side frames, an upper board is installed on the upper steel belt, either one of the upper board or the lower board is so constructed as to move up and down, the resinous starting material is pressed by the pressing operation of the board which moves up and down via the upper and lower steel belts, and the upper and lower boards are divided into a plurality of blocks so as to correspond to the opposing ones, thereby to constitute heating zones having heating means and cooling zones having cooling means.
Claim 3
Dependent Claim
55 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein the lower steel belt has a starting end which protrudes sideways beyond the upper steel belt, and means for preheating the resinous starting material which is being fed is provided in said protruded portion to constitute a preforming zone.
Claim 4
Dependent Claim
48 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 2, wherein a hopper for supplying the starting material is provided on the starting end of the lower steel belt so that the resinous starting material falls on the steel belt from said hopper.
Claim 5
Independent Claim
31 words
An apparatus for forming an elongated synthetic resin plate or sheet according to any one of claims 1 to 3, wherein the lower steel belt consists of a single endless belt.
Claim 6
Dependent Claim
47 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 2 or 3, wherein the lower steel belt consists of two endless belts that are arrayed contiguous with each other thereby to form a preforming zone, a heating zone and a cooling zone.
Claim 7
Dependent Claim
47 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 2 or 3, wherein the lower steel belt consists of three endless belts that are arrayed contiguous with each other thereby to form a preforming zone, a heating zone and a cooling zone.
Claim 8
Dependent Claim
26 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 4, wherein the upper steel belt consists of a single endless belt.
Claim 9
Dependent Claim
42 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 4, wherein the upper steel belt consists of two endless belts that are arrayed contiguous with each other thereby to form a heating zone and a cooling zone.
Claim 10
Dependent Claim
33 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein the heating zone consists of a plurality of blocks which apply different pressures and different heating temperatures.
Claim 11
Dependent Claim
23 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 9, wherein said heating zone includes a heat-insulating block.
Claim 12
Dependent Claim
33 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein said cooling zone consists of a plurality of blocks which apply different pressures and different cooling temperatures.
Claim 13
Dependent Claim
38 words
An apparatus for forming an elongated synthetic resin plate or sheet according to any one of claim 9, 10 or 11, wherein a suitable gap is formed among each of the blocks of said heating and cooling zones.
Claim 14
Dependent Claim
30 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein the upper steel belt is intermittently fed in synchronism with the lower steel belt.
Claim 15
Dependent Claim
43 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein said moving board moves up and down in sliding contact with the inner surfaces of the right and left side frames at least in the heating zone.
Claim 16
Dependent Claim
37 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 14, wherein the upper steel belt has a width which is slightly smaller than the distance between the right and left side frames.
Claim 17
Dependent Claim
88 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 14 or 15, wherein the right and left side frames are installed on the side steel belt via upwardly urging springs maintaining a small gap so as to move in the up and down directions, and when the moving board initiates its moving operation, the right and left side frames are downwardly moved prior to exerting pressure on the resinous starting material, and are pressed onto the lower board via the lower steel belt.
Claim 18
Dependent Claim
54 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein the neighboring portions of a plurality of blocks forming the upper board are formed in a tongued and grooved shape, such that the recessed portions and the protruding portions of the opposing blocks will fit to each other.
Claim 19
Dependent Claim
40 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 7, wherein an intermediate board consisting of a single plate is interposed under the whole length of the plurality of blocks that form the upper board.
Claim 20
Dependent Claim
34 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 8, wherein the intermediate board consists of a metal plate having a thickness greater than that of the steel belts.
Claim 21
Dependent Claim
55 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein a train of rollers is provided at the starting end of the upper steel belt to downwardly urge the upper steel belt, and the resinous starting material fed by the train of rollers is gradually compressed and is deaerated.
Claim 22
Dependent Claim
24 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein said resinous starting material is a thermoplastic resin.
Claim 23
Dependent Claim
29 words
An apparatus for forming an elongated synthetic resin plate or sheet according to claim 1, wherein the cooling zone is eliminated so that the thermosetting resins can be molded.
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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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |