US3586316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding sheets,blanks and the like
Assignee: Winkler and Duennebier Maschinefabrik und Eisengiesserei GmbH
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Filing: 1969-10-06
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Granted: 1971-06-22
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Expires: 1989-10-06
Abstract
Abstract An apparatus used for feeding sheets, blanks and the like from beneath a pile into a converting or processing machine, particularly a machine for making envelopes and the like, includes a middle rocking sucker engaging the bottom sheet of a pile and side suckers which rock along with the middle sucker. The apparatus is particularly characterized in that a separate control member is provided for the side suckers. This control member controls the start of the suction of the side suckers with a time delay with respect to the start of suction of the middle sucker and causes the suction of the side suckers to end simultaneously with the end of suction of the middle sucker.
Inventors
- 👤 Gunter Ehlscheid
- 👤 Ernst Meess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:06
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/46; B65H3/48; B65H3/08; B65H3/0808; B65H3/085; B65H3/0858; B65H3/0866
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
An apparatus for feeding sheets from beneath a pile of sheets, said apparatus comprising a plate for carrying said pile, a rocking middle sucker having a suction nozzle which is hollowed out at its top and which is adapted to contact the bottom sheet of the pile, whereby said bottom sheet is engaged approximately in the middle and near its front edge projecting beyond the plate, a suction air pipe, means connecting said sucker to said suction air pipe and periodically supplying suction to said sucker and then ending this supply of suction, a rocking tongue, said tongue rocking in time with the sucker and being adapted to penetrate between the bottom sheet drawn by the sucker and the next sheet of the pile, rocking pile supports consisting of blower nozzles and located laterally beside said sucker and said tongue, rotating feed segments for drawing the bottom sheet brought by the sucker, two additional rocking side suckers located on opposite sides of said middle sucker and rocking in time therewith, said side suckers being adapted to engage beneath the bottom sheet, and a separate control member connected with said side suckers and a suction air supply for supplying suction to said side suckers with a time delay relatively to the start of suction of said middle sucker and terminating the supply of suction to said side suckers simultaneously with the termination of the supply of suction to said middle sucker.
Claim 2
Independent Claim
240 words
An apparatus for feeding sheets from beneath a pile of sheets, said apparatus comprising a plate for carrying said pile, a rocking middle sucker having a suction nozzle which is hollowed out at its top and which is adapted to contact the bottom sheet of the pile, whereby said bottom sheet is engaged approximately in the middle and near its front edge projecting beyond the plate, a suction air pipe, means connecting said sucker to said suction air pipe and periodically supplying suction to said sucker and then ending this supply of suction, a rocking tongue, said tongue rocking in time with the sucker and being adapted to penetrate between the bottom sheet drawn by the sucker and the next sheet of the pile, rocking pile supports consisting of blower nozzles and located laterally beside said sucker and said tongue, rotating feed segments for drawing the bottom sheet brought by the sucker, two additional rocking side suckers located on opposite sides of said middle sucker and rocking in time therewith, said side suckers being adapted to engage beneath the bottom sheet, and a separate control member connected with said side suckers and a suction air supply for supplying suction to said side suckers with a time delay relatively to the start of suction of said middle sucker and terminating the supply of suction to said side suckers simultaneously with the termination of the supply of suction to said middle sucker.
Claim 3
Dependent Claim
17 words
An apparatus in accordance with claim 1, comprising a stationary blower nozzle associated with said middle sucker.
Claim 4
Dependent Claim
37 words
An apparatus in accordance with claim 2, wherein said control member is connecteD with said stationary blower nozzle for controlling both the suction air of said side suckers and the blowing air of said stationary blower nozzle.
Claim 5
Dependent Claim
57 words
An apparatus in accordance with claim 3, wherein said control member constitutes a rotary valve and comprises a rotary middle part and two stationary side parts located on opposite sides of said middle part, each of said side parts having two separate arcuate air ducts, said middle part having an aperture for intermittently connecting said air ducts.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |