US4960361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating sheetlike structures from piles
Assignee: BASF SE
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Filing: 1989-04-05
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Granted: 1990-10-02
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Expires: 2009-04-05
Abstract
Abstract Individual air permeably sheetlike structures are efficiently lifted from a pile by a vacuum lifter and deposited again at a processing station, the pile including as an alternate interlayer a sheet of air impermeable material.
Inventors
- 👤 Jaroslav Melzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:05
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/0808; B65H3/46; B65H2701/00; B65H2701/10; B65H2701/18; B65H2701/182; B65H2701/1826; B65H2701/18264
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A process for separating sheetlike structures of air permeable material from a pile by vacuum lifting, said process comprising the steps of assembling said pile by interleaving said structures of air permeable material in alternating sequence, with interlayer sheets of air impermeable material, vacuum lifting each said structure from said pile together with the respective underlying one of said air impermeable interlayer sheets, transporting any given one of said lifted structures together with its respective underlying interlayer sheet to a processing station, releasing said structure and said interlayer sheet, and separating said interlayer sheet from said structure.
Claim 2
Dependent Claim
97 words
A process for separating sheetlike structures of air permeable material from a pile by vacuum lifting, said process comprising the steps of assembling said pile by interleaving said structures of air permeable material in alternating sequence, with interlayer sheets of air impermeable material, vacuum lifting each said structure from said pile together with the respective underlying one of said air impermeable interlayer sheets, transporting any given one of said lifted structures together with its respective underlying interlayer sheet to a processing station, releasing said structure and said interlayer sheet, and separating said interlayer sheet from said structure.
Claim 3
Dependent Claim
62 words
A process as claimed in claim 1, wherein said interlayer sheets are of smaller dimensions that said structures, and wherein in said releasing step, said structure and underlying sheet are dropped onto a surface having a bottom opening of predetermined size such that said interlayer sheet is allowed to pass downwardly through said opening whereas said structure is retained by said surface.
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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |