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US3603448A Expired / Lapsed US ⏱️ 0.0 years remaining

Conveyer apparatus

Assignee: Tsubakimoto Chain Co
•
Filing: 1969-11-26
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Granted: 1971-09-07
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Expires: 1989-11-26
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Abstract

Abstract The present invention relates to a conveyor apparatus which comprises an endless slat conveyor which provides an air suction chamber, a pair of chains surrounding the air suction chamber, a plurality of slats extended between the chains, the slats having air suction ports and, if required, an elastic plate, and a plurality of driving sprockets to drive the endless slat conveyor; an endless backup belt which provides a pair of toothed belts (e.g. chains), the belts being maintained in intimate contact with the edges of the slats, and an airtight wide membrane extended loosely between a pair of the toothed belts (e.g. chains); and an air suction device which has an air suction tube connected to the air suction chamber and a blower. This conveyor apparatus is made up of a horizontal part and a vertical or inclined part. Articles supplied on the slats of the horizontal part are covered entirely by the airtight membrane and the membrane is sucked to the surface of the articles when the pressure in the space formed between the slat conveyor and the backup belt drops in the negative. Consequently, the articles are able to be conveyed in the vertical or inclined direction, while holding securely in a sense sandwiched between the slat conveyor and the backup belt.

Inventors

  • 👤 Tohei Okano
  • 👤 Takehiko Kannari

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 16:23
CPC Classifications
B; B65; B65G; B65G37/00; B65G2812/00; B65G2812/01; B65G2812/016; B65G2812/018

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 193 words
A conveyor apparatus, comprising: conveyor means having wall means defining an air suction chamber having an open wall portion; said conveyor means including movable, endless, flexible drive members and a plurality of slats extending between said drive members with said slats substantially closing said open wall portion of said suction chamber, said slats defining air suction openings extending between the external surface thereof and the interior of said suction chamber; movable, endless, flexible, backup means disposed adjacent said conveyor means for creating a substantially airtight cover over an article disposed on and being conveyed by said slats, said endless backup means including endless flexible drive elements and an airtight, wide, endless flexible membrane extending loosely between said pair of endless elements, the opposite edges of said membrane being maintained in airtight engagement with the edges of said slats throughout the conveying reach of said conveyor means; and air suction means connected to said air suction chamber for creating a suction therein to cause said flexible membrane to create an airtight cover over an article disposed on said slats for holding said article on said slats as it is conveyed by said conveyor means.
Claim 2
Dependent Claim 193 words
A conveyor apparatus, comprising: conveyor means having wall means defining an air suction chamber having an open wall portion; said conveyor means including movable, endless, flexible drive members and a plurality of slats extending between said drive members with said slats substantially closing said open wall portion of said suction chamber, said slats defining air suction openings extending between the external surface thereof and the interior of said suction chamber; movable, endless, flexible, backup means disposed adjacent said conveyor means for creating a substantially airtight cover over an article disposed on and being conveyed by said slats, said endless backup means including endless flexible drive elements and an airtight, wide, endless flexible membrane extending loosely between said pair of endless elements, the opposite edges of said membrane being maintained in airtight engagement with the edges of said slats throughout the conveying reach of said conveyor means; and air suction means connected to said air suction chamber for creating a suction therein to cause said flexible membrane to create an airtight cover over an article disposed on said slats for holding said article on said slats as it is conveyed by said conveyor means.
Claim 3
Dependent Claim 36 words
A conveyor apparatus according to claim 1, wherein said conveyor means includes an elastic plate secured to the external surface of said slats, said air suction openings extending through both said slats and said elastic plate.
Claim 4
Dependent Claim 23 words
A conveyor apparatus according to claim 1, wherein said endless flexible membrane is constructed at least in part of a flexible rubberlike material.
Claim 5
Dependent Claim 33 words
A conveyor apparatus according to claim 1, wherein said conveyor means and said backup means both include elongated inclined portions disposed adjacent one another for enabling articles to be conveyed between different elevations.
Claim 6
Dependent Claim 38 words
A conveyor apparatus according to claim 1, wherein said endless flexible drive members and said endless flexible drive elements comprise endless chainlike members disposed in engagement with rotatable toothed wheels for movably supporting said slats and said membrane.
Claim 7
Dependent Claim 62 words
A conveyor apparatus according to claim 1, wherein said wall means includes an elongated channel-shaped member disposed between and extending longitudinally of said endless drive members, the underside of the conveying reach of said conveyor means being disposed closely adjacent the open side of said channel-shaped member whereby said slats extend across said channel-shaped member and substantially close said open side thereof.

References Cited (Backward Citations)

US2971632A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-09-06 1975-03-08 1975-09-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-09-06 1979-03-08 1979-09-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-09-06 1983-03-08 1983-09-07 $7700.00 Window Closed / Lapsed

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