Patent US1273437A successfully refreshed from Google Patents.
Patent US3847390A successfully refreshed from Google Patents.
US3847390A
Expired / Lapsed
US
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Pneumatic sheet conveyor
Assignee: Weyerhaeuser Co
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Filing: 1973-03-21
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Granted: 1974-11-12
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Expires: 1993-03-21
Abstract
Abstract A pneumatic sheet conveying device is comprised of an elongated conduit having a slot along one side with a plurality of air jets directed inwardly and longitudinally along the conduit to convey an edge of the sheet material from the input end to the output end. An apron portion at the inlet end is provided in order to easily thread the sheet material into the longitudinal slot. An operator can efficiently and quickly thread the sheet material and convey it to any suitably desired downstream position.
Inventors
- 👤 J Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
CPC Classifications
B; B65; B65H; B65H5/00; B65H5/22; B65H5/228
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
189 words
A pneumatic conveying device for transporting thin flexible sheet material having an upstream inlet end and a downstream outlet end comprising: an elongated conduit having a slot along one side thereof extending longitudinally from the inlet end to the outlet end, means positioned along both edges and substantially the fuLl length of said slot to contain a supply of gas under pressure, said gas containing means having generally smooth spaced apart continuous surfaces with the space therebetween being greater than the thickness of the sheet material to be conveyed, a plurality of jet holes positioned in and spaced along the length of said gas containing means and directed inwardly toward the center of said conduit such that gaseous jets are uniformly directed across a plane that extends generally through said slot and the center of said conduit, and at least a portion of said jet holes being uniformly positioned in said gas containing means such that they are skewed in the downstream direction, whereby the gaseous jets exiting from said skewed jet holes tend to cause the sheet material to travel in the downstream direction toward said outlet end.
Claim 2
Dependent Claim
189 words
A pneumatic conveying device for transporting thin flexible sheet material having an upstream inlet end and a downstream outlet end comprising: an elongated conduit having a slot along one side thereof extending longitudinally from the inlet end to the outlet end, means positioned along both edges and substantially the fuLl length of said slot to contain a supply of gas under pressure, said gas containing means having generally smooth spaced apart continuous surfaces with the space therebetween being greater than the thickness of the sheet material to be conveyed, a plurality of jet holes positioned in and spaced along the length of said gas containing means and directed inwardly toward the center of said conduit such that gaseous jets are uniformly directed across a plane that extends generally through said slot and the center of said conduit, and at least a portion of said jet holes being uniformly positioned in said gas containing means such that they are skewed in the downstream direction, whereby the gaseous jets exiting from said skewed jet holes tend to cause the sheet material to travel in the downstream direction toward said outlet end.
Claim 3
Dependent Claim
22 words
The device as in claim 1 including means at the inlet end to aid in directing the sheet material into said slot.
Claim 4
Dependent Claim
36 words
The device as in claim 2 wherein said aiding means includes an apron extending outwardly from said slot to accept and support an edge on the sheet material as it is being inserted into said slot.
Claim 5
Dependent Claim
45 words
The device as in claim 1 including a jet pipe at the inlet end of said conduit directed generally in the downstream direction in order to provide additional motive force through a gaseous jet exiting therefrom to the sheet material as it is being conveyed.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |