Patent US3704884A successfully refreshed from Google Patents.
US3704884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacking device for flexible workpieces
Assignee: Duerkoppwerke GmbH
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Filing: 1970-03-05
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Granted: 1972-12-05
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Expires: 1990-03-05
Abstract
Abstract A succession of work pieces, moving along a work table past a sewing machine, are stacked on a rail beyond a transverse discharge edge of the work table by being allowed to depend from that edge between the table and the rail for at least half of their length, the leading end of each workpiece being clamped in position while the trailing end is thrown across the rail so as to be draped symmetrically therearound.
Inventors
- 👤 Karl Nicolay
- 👤 Konrad Pollmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:58
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/38; B65H29/44; B65H29/24; B65H29/245; B65H29/246; D; D05; D05B; D05B41/00; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4215; D05D; D05D2207/00; D05D2207/02; D05D2207/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
239 words
A system for the stacking of a succession of workpieces arriving over a predetermined path, comprising: a substantially horizontal support for said workpieces, said support being provided with a transverse discharge edge at the end of said path; a gripper with normally open jaws disposed beneath said support in alignment with said edge for engaging a leading end of a workpiece hanging down from said edge; drive means for vertically reciprocating said gripper between an upper position close to said support and a lower position remote therefrom; operating means synchronized with said drive means for closing said jaws around said leading end in said upper position and for releasing said leading end in said lower position upon downward entrainment of an engaged workpiece; a substantially horizontal elongate stacking member extending parallel to said edge below the level of said support and above the level of said lower position; first nozzle means between the levels of said stacking member and said support operative upon a descent of said gripper to said lower position for training a first air blast upon a trailing end of said workpiece, thereby throwing said trailing end across said stacking member; and second nozzle means below the level of said support and above the level of said lower position operative upon the reopening of said jaws for training a second air blast upon the released trailing end of said workpiece to dislodge same from said gripper.
Claim 2
Independent Claim
239 words
A system for the stacking of a succession of workpieces arriving over a predetermined path, comprising: a substantially horizontal support for said workpieces, said support being provided with a transverse discharge edge at the end of said path; a gripper with normally open jaws disposed beneath said support in alignment with said edge for engaging a leading end of a workpiece hanging down from said edge; drive means for vertically reciprocating said gripper between an upper position close to said support and a lower position remote therefrom; operating means synchronized with said drive means for closing said jaws around said leading end in said upper position and for releasing said leading end in said lower position upon downward entrainment of an engaged workpiece; a substantially horizontal elongate stacking member extending parallel to said edge below the level of said support and above the level of said lower position; first nozzle means between the levels of said stacking member and said support operative upon a descent of said gripper to said lower position for training a first air blast upon a trailing end of said workpiece, thereby throwing said trailing end across said stacking member; and second nozzle means below the level of said support and above the level of said lower position operative upon the reopening of said jaws for training a second air blast upon the released trailing end of said workpiece to dislodge same from said gripper.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |