Patent US3708058A successfully refreshed from Google Patents.
US3708058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum belt conveyor
Assignee: Tarkett AB
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Filing: 1971-01-08
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Granted: 1973-01-02
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Expires: 1991-01-08
Abstract
Abstract Flat objects are conveyed by the under surface of a springy layer on a continuous belt which moves in contact with the smooth bottom surface of a vacuum plenum chamber having an elongated slot opening to the center of the belt which has a series of perforations each corresponding to an enlarged hole in the springy layer that grips each flat object under the vacuum influence of the plenum chamber.
Inventors
- 👤 A Kalven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:50
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/20; B65G21/2027; B65G21/2036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
An improved conveyor apparatus combination for handling an article such as a floor tile including: a vacuum plenum chamber having a bottom wall provided with a single central slot extending longitudily thereof, being surrounded by several rows of perforations; a conveyor belt having perforations disposed at equal intervals located directly under such slot, being in contact with a smooth under surface of said plenum chamber, the improvement comprises providing said belt with a base material compound of fiber reinforced rubber having a series of perforations about five-sixteenth inch in diameter, adapted to communicate with said slot; and a layer of closed cell spongy material laminated to the top of said belt on the outer surface thereof: said spongy material having holes concentric to those of said belt and about 1 3/8 inch in diameter; whereby the combination creates an endless series of suction cups, the top layer of which forms the sealing medium between a floor tile and said conveyor belt.
Claim 2
Dependent Claim
161 words
An improved conveyor apparatus combination for handling an article such as a floor tile including: a vacuum plenum chamber having a bottom wall provided with a single central slot extending longitudily thereof, being surrounded by several rows of perforations; a conveyor belt having perforations disposed at equal intervals located directly under such slot, being in contact with a smooth under surface of said plenum chamber, the improvement comprises providing said belt with a base material compound of fiber reinforced rubber having a series of perforations about five-sixteenth inch in diameter, adapted to communicate with said slot; and a layer of closed cell spongy material laminated to the top of said belt on the outer surface thereof: said spongy material having holes concentric to those of said belt and about 1 3/8 inch in diameter; whereby the combination creates an endless series of suction cups, the top layer of which forms the sealing medium between a floor tile and said conveyor belt.
References Cited (Backward Citations)
US3477558A
Cited
US3545631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |