US3853442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing sheet material
Assignee: PETRARCH CLADDINGS Ltd
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Filing: 1972-12-29
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Granted: 1974-12-10
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Expires: 1992-12-29
Abstract
Abstract The apparatus is for the preparation of sheet materials containing resin, fibres and particulate material as a homogeneous mass. The apparatus has a continuously moving conveyor belt. The belt can be lined to protect the apparatus with a barrier material such as cellophane, and the homogeneous material is deposited on to it. A second layer of cellophane can cover the material before it is initially compacted or compressed under a nip roller. The material is further compacted under pressure from a train of reciprocating rollers moving up and down a length of the conveyor belt above a supporting plate to produce a uniform sheet of material. After complete compaction the material is cut, removed from the conveyor belt and cured.
Inventors
- 👤 P Stemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:49
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/10; B; B27; B27N; B27N3/00; B27N3/08; B27N3/24; B29; B29C; B29C67/00; B29C67/24; B29C67/242; B29C67/245; B30; B30B; B30B3/00; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
165 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material, which apparatus comprises, in combination, a. an endless conveyor belt having means to drive the conveyor belt past the following stations in succession; b. a depositing station to supply the material evenly onto the conveyor belt; c. a compression station comprising at least one nip roller to compact the material on the belt surface; d. a compacting station comprising i. a movable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt; ii. a support plate beneath the conveyor belt; iii. a plurality of rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt; and iv. pressure means to move the roller towards the support plate to compress the material as the carriage is reciprocated; and e. a station from which compacted material is removed from the conveyor belt.
Claim 2
Independent Claim
165 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material, which apparatus comprises, in combination, a. an endless conveyor belt having means to drive the conveyor belt past the following stations in succession; b. a depositing station to supply the material evenly onto the conveyor belt; c. a compression station comprising at least one nip roller to compact the material on the belt surface; d. a compacting station comprising i. a movable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt; ii. a support plate beneath the conveyor belt; iii. a plurality of rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt; and iv. pressure means to move the roller towards the support plate to compress the material as the carriage is reciprocated; and e. a station from which compacted material is removed from the conveyor belt.
Claim 3
Dependent Claim
26 words
An apparatus as claimed in claim 1 wherein feed means for thin-barrier sheet material for lining the conveyor belt is mounted upstream of the depositing station.
Claim 4
Dependent Claim
32 words
An apparatus as claimed in claim 2 wherein a second feed means for thin-barrier sheet material for lining the material on the conveyor belt is mounted down stream of the depositing station.
Claim 5
Dependent Claim
20 words
An apparatus as claimed in claim 1 wherein the depositing station comprises at least one pair of counter-rotating intermeshing tines.
Claim 6
Dependent Claim
17 words
An apparatus as claimed in claim 1 wherein there is crank means to reciprocate the moveable carriage.
Claim 7
Dependent Claim
30 words
An apparatus as claimed in claim 1 wherein there is, at the station to remove the compacted material from the conveyor belT, a cutting means to cut the continuous sheet.
Claim 8
Dependent Claim
35 words
An apparatus as claimed in claim 1 wherein a metering station comprising a series of narrow rollers arranged transversely across the compacted material connected to thickness sensing devices, is situated downstream of the compacting station.
Claim 9
Independent Claim
197 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material, which apparatus comprises in combination a. an endless conveyor belt having means to drive the conveyor belt past the following stations: b. a feed means for thin-barrier sheet material for lining the conveyor belt c. a depositing station to supply the material evenly onto the lined conveyor belt d. a feed means for thin-barrier sheet material for placing lining on the deposited material, mounted downstream of the depositing station e. a compression station comprising at least one nip roller to compress the material on the belt surface f. a compacting station comprising i. a moveable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt ii. a support plate beneath the conveyor belt iii. a plurality of cylindrical rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt iv. means to move the rollers towards the support plate to compress the material as the carriage is reciprocated; and g. a station from which compacted material is removed from the conveyor belt.
Claim 10
Independent Claim
197 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material, which apparatus comprises in combination a. an endless conveyor belt having means to drive the conveyor belt past the following stations: b. a feed means for thin-barrier sheet material for lining the conveyor belt c. a depositing station to supply the material evenly onto the lined conveyor belt d. a feed means for thin-barrier sheet material for placing lining on the deposited material, mounted downstream of the depositing station e. a compression station comprising at least one nip roller to compress the material on the belt surface f. a compacting station comprising i. a moveable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt ii. a support plate beneath the conveyor belt iii. a plurality of cylindrical rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt iv. means to move the rollers towards the support plate to compress the material as the carriage is reciprocated; and g. a station from which compacted material is removed from the conveyor belt.
Claim 11
Dependent Claim
17 words
An apparatus as claimed in claim 8 wherein there is crank means to reciprocate the moveable carriage.
Claim 12
Dependent Claim
30 words
An apparatus as claimed in claim 8, wherein there is at the station to remove the compacted material from the conveyor belt, a cutting means to cut the continuous sheet.
Claim 13
Dependent Claim
35 words
An apparatus as claimed in claim 8 wherein a metering station comprises a series of narrow rollers arranged transversely across the compacted material connected to thickness sensing devices, is situated downstream of the compacting station.
Claim 14
Dependent Claim
48 words
An apparatus as claimed in claim 8 wherein there are edge restraints preventing the material passing over each edge of the belt which means comprises a rubber strip bonded to the surface at each edge of the conveyor belt upon which the materials to be compacted are deposited.
Claim 15
Independent Claim
213 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material which apparatus comprises, in combination a. an endless conveyor belt having means to drive the conveyor belt past the following stations in succession; b. a feed means for thin-barrier sheet material for lining the conveyor belt, c. a depositing station to supply the material evenly into the lined conveyor belt which station comprises counter-rotating intermeshing tines, d. a feed means for thin-barrier sheet material for placing lining onto the deposited material, mounted downstream of the depositing station, e. a compression station comprising at least one nip roller to compress the material on the belt surface f. a compacting station comprising i. a moveable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt; ii. a support plate beneath the conveyor belt iii. a plurality of cylindrical rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt. iv. means to move the roller towards the support plate to compress the material as the carriage is reciprocated; and g. a station to remove the compacted material from the conveyor belt including a cutting means to cut the continuous sheet.
Claim 16
Independent Claim
213 words
An apparatus for preparing a sheet material from a homogeneous mass of resin, fibrous and particulate material which apparatus comprises, in combination a. an endless conveyor belt having means to drive the conveyor belt past the following stations in succession; b. a feed means for thin-barrier sheet material for lining the conveyor belt, c. a depositing station to supply the material evenly into the lined conveyor belt which station comprises counter-rotating intermeshing tines, d. a feed means for thin-barrier sheet material for placing lining onto the deposited material, mounted downstream of the depositing station, e. a compression station comprising at least one nip roller to compress the material on the belt surface f. a compacting station comprising i. a moveable carriage which is reciprocable relative to the conveyor belt in a direction longitudinal to the movement of the conveyor belt; ii. a support plate beneath the conveyor belt iii. a plurality of cylindrical rollers mounted on the carriage for rotation about an axis transverse to the direction of movement of the belt. iv. means to move the roller towards the support plate to compress the material as the carriage is reciprocated; and g. a station to remove the compacted material from the conveyor belt including a cutting means to cut the continuous sheet.
Claim 17
Dependent Claim
18 words
An apparatus as claimed in claim 13 wherein the moveable carriage is reciprocatable by means of a crank.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |