Patent US3877353A successfully refreshed from Google Patents.
US3877353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripping device
Assignee: Boeing North American Inc
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Filing: 1973-11-12
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Granted: 1975-04-15
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Expires: 1993-11-12
Abstract
Abstract A rotatable pin cylinder and a coacting backing or anvil roller define a nip through which die cut and creased sheet material is fed to have intervening waste pieces removed. A hollow cylinder or combing drum is telescoped over the pin cylinder for rotation about an axis which is eccentric with respect to the pin cylinder axis. The drum and cylinder and driven in unison and as they rotate through a complete cycle, radially projecting stripper pins carried by the pin cylinder are caused to project through apertures in the combing drum to impale and separate waste pieces from the sheet material in the area of the stripping nip. Thereafter the pins are progressively retracted within the periphery of the combing drum to positively eject the waste pieces in an area approximately opposite the stripping nip.
Inventors
- 👤 Walter S Smith
- 👤 Joseph E Mazur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/18; B26D7/1836; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2074; Y10T83/2079; Y10T83/2092; Y10T83/2096; Y10T83/21; Y10T83/2105; Y10T83/2107
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
176 words
Stripping apparatus for separating waste pieces from precreased material comprising, a rotatable cylinder, stripper means mounted on said cylinder and having tips projecting radially beyond the surface of said cylinder, roller means mounted adjacent said cylinder and defining therewith a stripping nip, said roller means being adapted to coact with said stripper means to impale the waste pieces on the tips thereof as the sheet material moves through said stripping nip, a hollow drum telescoped over said cylinder, said hollow drum being coextensive axially with said cylinder and having apertures in the surface thereof in selected positions coinciding with the location of the stripper means on said cylinder, and means mounting said drum for independent rotation in unison with said cylinder about a fixed axis eccentric with respect to the cylinder axis whereby said drum surface is located intermediate the cylinder surface and the tips of said stripper means in the area of the stripping nip and is spaced radially outwardly beyond the tips of said stripper means in an area spaced from said stripping nip.
Claim 2
Dependent Claim
176 words
Stripping apparatus for separating waste pieces from precreased material comprising, a rotatable cylinder, stripper means mounted on said cylinder and having tips projecting radially beyond the surface of said cylinder, roller means mounted adjacent said cylinder and defining therewith a stripping nip, said roller means being adapted to coact with said stripper means to impale the waste pieces on the tips thereof as the sheet material moves through said stripping nip, a hollow drum telescoped over said cylinder, said hollow drum being coextensive axially with said cylinder and having apertures in the surface thereof in selected positions coinciding with the location of the stripper means on said cylinder, and means mounting said drum for independent rotation in unison with said cylinder about a fixed axis eccentric with respect to the cylinder axis whereby said drum surface is located intermediate the cylinder surface and the tips of said stripper means in the area of the stripping nip and is spaced radially outwardly beyond the tips of said stripper means in an area spaced from said stripping nip.
Claim 3
Dependent Claim
30 words
Stripping apparatus as set forth in claim 1 wherein said stripper means includes a plurality of individual releasable stripper pins having respective barbed waste-engaging tips for impaling the waste pieces.
Claim 4
Dependent Claim
31 words
Stripping apparatus as set forth in claim 1 further including drive means for independently rotating said cylinder and drum in unison about their respective axes and at the same angular velocity.
Claim 5
Dependent Claim
43 words
Stripping apparatus as set forth in claim 1, wherein said hollow drum is releasably supported on a disc at each end thereof, and said mounting means support said discs for rotation about an axis eccentric with respect to the axis of said cylinder.
Claim 6
Dependent Claim
31 words
Stripping apparatus as set forth in claim 4, wherein at least one of said discs is supported whereby it is axially retractable to facilitate installation and removal of said hollow drum.
Claim 7
Dependent Claim
53 words
Stripping apparatus as set forth in claim 2, wherein each of said stripper pins comprises an annular body portion having spaced apart radially projecting legs thereon, a groove formed in each said leg, and said cylinder having shoulder means for coaction with said grooves to releasably retain the stripper pins on said cylinder.
References Cited (Backward Citations)
US475246A
Cited
US3320864A
Cited
US3371584A
Cited
US3404607A
Cited
US3435737A
Cited
US3503309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |