US3880274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover belt conveyor
Assignee: Individual
•
Filing: 1973-07-31
•
Granted: 1975-04-29
•
Expires: 1993-07-31
Abstract
Abstract A cover belt conveyor assembly includes two belt conveyors running, at least in a part of the conveying distance, in initial contact and in the same direction. At least one of the conveyor belts has, on a surface facing the other belt, a thick, resiliently deformable layer of a plastic foam material for enclosing articles to be conveyed. In the zone of the neutral plane resulting from deformation of the plastic foam layer, respective strips extend laterally from the opposite longitudinal edges of the belt and engage support means, such as rollers, at least in the area of deformation of the plastic foam layer. A back-up roller may be provided for the layer and is spaced from such neutral plane by the thickness of the unloaded and nondeformed plastic foam layer. The plastic foam layer may be covered by a skin of a tougher material, and reinforcements may be embedded in the laterally projecting strips to extend longitudinally of the belt.
Inventors
- 👤 Gert Bechtloff
- 👤 Reinhold Szonn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:27
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/10; B65G15/12; B65G15/14; B65G15/30; B65G15/32; B65G15/34; B65G2207/00; B65G2207/42; B65G2812/00; B65G2812/01; B65G2812/016; B65G2812/018
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
189 words
In a cover belt conveyor assembly of two endlesS belt conveyors running, in at least a part of the conveying distance, in mutual contact and in the same direction, the endless belt conveyors having direction changing deflection areas and at least one of the belt conveyors having, extending longitudinally of its surface facing the other belt conveyor, a thick resiliently deformable layer of a plastic foam material, for enclosing articles to be conveyed, the layer of a plastic foam material having longitudinal edges extending in the conveying direction and being stressed, transversely of its thickness, in both compression and tension, on opposite sides of a neutral plane, at the direction changing deflection areas of the at least one belt conveyor, the improvement comprising, in combination, said at least one belt conveyor, in the neutral plane of the plastic foam material layer thereon, projecting outwardly beyond the longitudinally extending side edges of said layer to form outwardly projecting lateral support strips extending longitudinally of the conveying direction; and support means engaging said lateral support strips at least in the direction changing deflection areas of said at least one belt conveyor.
Claim 2
Dependent Claim
189 words
In a cover belt conveyor assembly of two endlesS belt conveyors running, in at least a part of the conveying distance, in mutual contact and in the same direction, the endless belt conveyors having direction changing deflection areas and at least one of the belt conveyors having, extending longitudinally of its surface facing the other belt conveyor, a thick resiliently deformable layer of a plastic foam material, for enclosing articles to be conveyed, the layer of a plastic foam material having longitudinal edges extending in the conveying direction and being stressed, transversely of its thickness, in both compression and tension, on opposite sides of a neutral plane, at the direction changing deflection areas of the at least one belt conveyor, the improvement comprising, in combination, said at least one belt conveyor, in the neutral plane of the plastic foam material layer thereon, projecting outwardly beyond the longitudinally extending side edges of said layer to form outwardly projecting lateral support strips extending longitudinally of the conveying direction; and support means engaging said lateral support strips at least in the direction changing deflection areas of said at least one belt conveyor.
Claim 3
Dependent Claim
28 words
In a cover belt conveyor assembly, the improvement claimed in claim 1, including a back-up roller in the deflection area inside of the layer of plastic foam material.
Claim 4
Dependent Claim
43 words
In a cover belt conveyor, the improvement claimed in claim 2, in which the perpendicular distance between the periphery of said back-up roller and said lateral strips is substantially equal to the thickness of the undeformed inner portion of said plastic foam layer.
Claim 5
Dependent Claim
35 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said at least one belt conveyor is designed as a through-carrier covered on both surfaces by said layer of plastic foam material.
Claim 6
Dependent Claim
26 words
In a cover belt conveyor, the improvement claimed in claim 4, in which said through-carrier comprises a layer embedded in said layer of plastic foam material.
Claim 7
Dependent Claim
20 words
In a cover belt conveyor, the improvement claimed in claim 5, in which said embedded layer is formed with through-holes.
Claim 8
Dependent Claim
23 words
In a cover belt conveyor, the improvement claimed in claim 5, in which said embedded layer is a flexible and elastic screen web.
Claim 9
Dependent Claim
35 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said at least one belt conveyor is designed as a strip protruding into the interior of said layer of plastic foam material.
Claim 10
Dependent Claim
29 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said at least one belt conveyor comprises a skin enclosing said layer of plastic foam material.
Claim 11
Dependent Claim
38 words
In a cover belt conveyor, the improvement claimed in claim 9, in which said layer of plastic foam material and said skin comprise a polyurethane, with said skin being more densified than said layer of plastic foam material.
Claim 12
Dependent Claim
33 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said plastic foam material layer is more deformable on its side facing said support means than on its exterior side.
Claim 13
Dependent Claim
108 words
In a cover belt conveyor, the improvement claimed in claim 11, in which the portion of said layer of plastic foam material facing said support means on the inner side of said at least one belt conveyor and the portion of said layer of plastic foam material on the outer side of said at least one belt conveyor are formed of different materials; the material of the portion on the inner side of said at least one belt conveyor, facing said support means, being more deformable than the material of said portion of said plastic foam material on the outer surface of said at least one belt conveyor.
Claim 14
Dependent Claim
45 words
In a cover belt conveyor, the improvement claimed in claim 11, in which said layer of plastic foam material, in its surface facing said support means, is formed with transversely extending recesses closed at the edges of said layer but opening toward said support means.
Claim 15
Dependent Claim
20 words
In a cover belt conveyor, the improvement claimed in claim 13, in which said recesseS are covered by a skin.
Claim 16
Dependent Claim
19 words
In a cover belt conveyor, the improvement claimed in claim 14, in which said skin is a reinforced polyurethane.
Claim 17
Dependent Claim
25 words
In a cover belt conveyor, the improvement claimed in claim 1, including reinforcements extending along said at least one belt conveyor in said neutral plane.
Claim 18
Dependent Claim
24 words
In a cover belt conveyor, the improvement claimed in claim 16, in which said reinforcements are embedded in said layer of plastic foam material.
Claim 19
Dependent Claim
22 words
In a cover belt conveyor, the improvement claimed in claim 16, in which said reinforcements are embedded in said lateral support strips.
Claim 20
Dependent Claim
19 words
In a cover belt conveyor, the improvement claimed in claim 16, in which said reinforcements are elongated metal elements.
Claim 21
Dependent Claim
21 words
In a cover belt conveyor, the improvement claimed in claim 16, in which said reinforcements are elongated elements of a polyester.
Claim 22
Dependent Claim
22 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said lateral support strips are designed as gear belts.
Claim 23
Dependent Claim
27 words
In a cover belt conveyor, the improvement claimed in claim 21, including reinfocements in the zone of said neutral plane and also in said lateral support strips.
Claim 24
Dependent Claim
31 words
In a cover belt conveyor, the improvement claimed in claim 21, in which said support means comprise rollers; the teeth of said gear belts engaging gear wheels coaxial with said rollers.
Claim 25
Dependent Claim
35 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said lateral support strips are formed with longitudinal beads; said support means comprising support rollers formed with circumferential grooves engaging said beads.
Claim 26
Dependent Claim
36 words
In a cover belt conveyor, the improvement claimed in claim 1, in which said lateral support strips are designed as V-belts; said support means comprising support rollers formed with circumferentially extending V-grooves meshing with said V-belts.
Claim 27
Dependent Claim
18 words
In a cover belt conveyor, the improvement claimed in claim 24, including reinforcing inserts in said longitudinal beads.
Claim 28
Dependent Claim
29 words
In a cover belt conveyor, the improvement claimed in claim 14, in which said covering skin is so structured that, in the deflection area, it arches inwardly into recesses.
Claim 29
Dependent Claim
48 words
In a cover belt conveyor, the improvement claimed in claim 1, in which that side of said layer of plastic foam material facing said support means is provided with profiled surfaces; said support means comprising back-up rollers and deflection rollers formed with teeth corresponding to said profiled surfaces.
Claim 30
Dependent Claim
45 words
In a cover belt conveyor, the improvement claimed in claim 9, in which that side of said covering skin facing said support means is provided with profiled surfaces; said support means comprising back-up rollers and deflection rollers formed with teeth corresponding to said profiled surfaces.
Claim 31
Dependent Claim
36 words
In a cover belt conveyor, the improvement claimed in claim 28, in which said profiled surfaces are formed by ribs integral with the inner side of said layer of plastic foam material facing said support means.
Claim 32
Dependent Claim
21 words
In a cover belt conveyor, the improvement claimed in claim 30, in which said ribs are axially parallel to each other.
Claim 33
Dependent Claim
24 words
In a cover belt conveyor, the improvement claimed in claim 30, in which said ribs are vulcanized to said layer of plastic foam material.
Claim 34
Dependent Claim
24 words
In a cover belt conveyor, the improvement claimed in claim 30, in which said ribs are stuck onto said layer of plastic foam material.
Claim 35
Dependent Claim
17 words
In a cover belt conveyor, the improvement claimed in claim 28, including reinforcements embedded in said ribs.
References Cited (Backward Citations)
US3319776A
Cited
US3446332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |