US3048391A - Sheet feed apparatus - Google Patents
Sheet feed apparatus Download PDFInfo
- Publication number
- US3048391A US3048391A US859807A US85980759A US3048391A US 3048391 A US3048391 A US 3048391A US 859807 A US859807 A US 859807A US 85980759 A US85980759 A US 85980759A US 3048391 A US3048391 A US 3048391A
- Authority
- US
- United States
- Prior art keywords
- lifting
- feed apparatus
- sheet feed
- bracket
- suckers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
- B65H3/0883—Construction of suction grippers or their holding devices
Definitions
- SHEET FEED APPARATUS Filed Dec. 15, 1959 llilll 1
- SHEET FEED APPARATUS Georg Spiess, 9 Possartstrasse, Kunststoff, Germany Filed Dec. 15, 1959, Ser. No. 859,807 Claims priority, application Germany Dec. 15, 1958 1 Claim. (Cl. 271-26) 'I'his invention relates :to sheet feed apparatus having separating and lifting suckers of telescopic form, of which at least two are disposed near the rear edge of the stack ⁇ from which sheets are to be fed one at a time.
- the present invention provides ⁇ for the telescopically arranged separating and lifting suckers to be supported in such a way that their angle of inclination out of the vertical is adjustable, preferably within a range of about six to zero degrees to the vertical.
- a vacuum con nection tube to the respective sucker at each side is supported inl a projecting arm having a cylindrically turned end supported free to rotate in a suitable socket in a bracket fixed to the main vacuum tube, so as to constitute pivoting axis for the respective sucker.
- the cylindrically turned end of the projecting arm may be pressed in an airtight manner against the edge of the bracket by means of a lfixing screw inserted axially therein. It may also be desirable for the angular adjustment of the lifting sucker to be limited in both directions by stops.
- FIG. l is an elevation of the device as viewed from the rear of the stack of sheets to be fed;
- FIG. 2 is a view similar to FIG. 1 but showing the suckers in inclined positions
- Y FIG. 3 is a cross-section taken on the line III-III of FIG. 1.
- the arrangement comprises lifting suckers 1 and 2, of known telescopic form, which are situated at the two 3,948,391 Patented Aug. 7, 1962 connecting pipe 6 leading from the respective sucker.
- a screw 7 has its threaded portion 8 inserted into an axial threaded hole at the end of the projecting arm remote from the pipe 6 in such a way that the head of the screw 7 is in contact with a washer 9 which overlaps the bracket 4.
- the projecting arm 5, together with the lifting sucker can be rotated (when the screw 7 is loosened) around the axis 11 (shown as a dot-and-dash line) of the socket of bracket 4 and can be tixed in any position by tightening the screw 7.
- the ⁇ feeler is not shown in the drawing. This feeler lies on the rear edge of the stack 15, approximately in the position marked by the reference numeral 14.
- a device for use in a sheet feeder for lifting successive sheets from a pile of sheets comprising a vacuum tube support extending transversely of said pile, a bracket mounted on either end of said support and an elongated socket having a passage therein connected to each of said brackets and rotatable therein and adapted to engage a pipe, said pipe being rotatable with the bracket and connected to said vacuum tube through said bracket, a suction gripper depending Ifrom :the end of each of said pipes, said suction grippers adapted to be moved from a normal vertical position towards each other, and a pin and stop assembly mounted on each of said brackets for limiting the movement thereof, and screw means connected to the socket for locking said suction grippers in the -adjusted position.
Description
Aug.
7*, 1962 G. sPn-:ss
SHEET FEED APPARATUS Filed Dec. 15, 1959 llilll 1| ll llilllllm United States aten-t 3,048,391 SHEET FEED APPARATUS Georg Spiess, 9 Possartstrasse, Munich, Germany Filed Dec. 15, 1959, Ser. No. 859,807 Claims priority, application Germany Dec. 15, 1958 1 Claim. (Cl. 271-26) 'I'his invention relates :to sheet feed apparatus having separating and lifting suckers of telescopic form, of which at least two are disposed near the rear edge of the stack `from which sheets are to be fed one at a time. The practice of arranging the separating `and lifting suckers on such sheetafeed appliances so that their 4axes are not aligned in a `strictly vertical position to the surface of the stack, but are inclined somewhat out of the vertical towards the centre of the stack, is already known. 'Ihe purpose of this slight inclination is to achieve tautness in the part of the uppermost sheet between the two lifting suckers or suction lgrippers so that a feeler, arranged between the suckers, does not touch the sheet which has just been picked up, when it is placed on the stack.
In practice, however, it is found that this oblique arrangement of the lifting suckers may interfere with smooth running when thick paper or card is being handled. Owing to the stiffness of the sheet material, it may happen that the inclined lifting suckers are not raised quite to their topmost positions, because the part of the sheet held between them does not yield sufficiently. In order to eliminate this disadvantage, the present invention provides `for the telescopically arranged separating and lifting suckers to be supported in such a way that their angle of inclination out of the vertical is adjustable, preferably within a range of about six to zero degrees to the vertical.
Such adjustment may be arranged in various ways from the point of view of design, `whilst ensuring air tightness of the vacuum connections to the lifting suckers. ln one possible form of the invention, a vacuum con nection tube to the respective sucker at each side is supported inl a projecting arm having a cylindrically turned end supported free to rotate in a suitable socket in a bracket fixed to the main vacuum tube, so as to constitute pivoting axis for the respective sucker. The cylindrically turned end of the projecting arm may be pressed in an airtight manner against the edge of the bracket by means of a lfixing screw inserted axially therein. It may also be desirable for the angular adjustment of the lifting sucker to be limited in both directions by stops.
The invention will be described further, by way of example, with reference to the accompanying drawings which illustrate one practical embodiment, and wherein:
FIG. l is an elevation of the device as viewed from the rear of the stack of sheets to be fed;
FIG. 2 is a view similar to FIG. 1 but showing the suckers in inclined positions, and Y FIG. 3 is a cross-section taken on the line III-III of FIG. 1.
The arrangement comprises lifting suckers 1 and 2, of known telescopic form, which are situated at the two 3,948,391 Patented Aug. 7, 1962 connecting pipe 6 leading from the respective sucker.
1 or 2 being `secured into the ar-m 5. A screw 7 has its threaded portion 8 inserted into an axial threaded hole at the end of the projecting arm remote from the pipe 6 in such a way that the head of the screw 7 is in contact with a washer 9 which overlaps the bracket 4. AS a result of this arrangement, the projecting arm 5, together with the lifting sucker can be rotated (when the screw 7 is loosened) around the axis 11 (shown as a dot-and-dash line) of the socket of bracket 4 and can be tixed in any position by tightening the screw 7. When this screw 7 is tightened, the confronting sealing surfaces 10 between the bracket 4 .and arm 5 are pressed tightly together, a packing ring (not shown) being arranged between them if necessary. On the outside of the projecting arm 5 is a peg 12 which lies between two stops 13 on the outside of the bracket 4 and thus limits the angle of adjustment of the lifting sucker round the axis 11 in both directions, by its contact with these stops. In addition, the lifting sucker is adjustable in known manner so far as its position is concerned in the direction of feed of the sheets, by pivoting round the' axis ofthe vacuum connecting pipe 6.
For the sake of simplicity, the `feeler is not shown in the drawing. This feeler lies on the rear edge of the stack 15, approximately in the position marked by the reference numeral 14.
l claim:
A device for use in a sheet feeder for lifting successive sheets from a pile of sheets, comprising a vacuum tube support extending transversely of said pile, a bracket mounted on either end of said support and an elongated socket having a passage therein connected to each of said brackets and rotatable therein and adapted to engage a pipe, said pipe being rotatable with the bracket and connected to said vacuum tube through said bracket, a suction gripper depending Ifrom :the end of each of said pipes, said suction grippers adapted to be moved from a normal vertical position towards each other, and a pin and stop assembly mounted on each of said brackets for limiting the movement thereof, and screw means connected to the socket for locking said suction grippers in the -adjusted position.
References Cited in the file of this patent UNITED STATES PATENTS 1,433,423 Stevens Oct. 24, 1922 2,869,867 Backhouse Jan. 20, 1959 2,941,799 Reincke .Tune 21, 1960 2,950,913 Staines Aug. 30, 1960 FOREIGN PATENTS 412,015 Germany Apr. 8, 1925 674,844 Great Britain July 2, 1952
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3048391X | 1958-12-15 |
Publications (1)
Publication Number | Publication Date |
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US3048391A true US3048391A (en) | 1962-08-07 |
Family
ID=8085231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US859807A Expired - Lifetime US3048391A (en) | 1958-12-15 | 1959-12-15 | Sheet feed apparatus |
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Country | Link |
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US (1) | US3048391A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4869489A (en) * | 1987-04-01 | 1989-09-26 | Heidelberger Druckmaschinen Ag | Suction head with lifting suction devices |
US5137267A (en) * | 1989-11-21 | 1992-08-11 | Heidelberger Druckmaschinen Ag | Suction head for a feeder of a sheet-fed rotary printing press |
US5350166A (en) * | 1990-07-13 | 1994-09-27 | Canon Kabushiki Kaisha | Sheet separating mechanism and method of flexing a sheet to facilitate separation from a stack |
US5352086A (en) * | 1990-01-27 | 1994-10-04 | Georg Speiss Gmbh | Apparatus for lifting sheets from a stack |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1433423A (en) * | 1921-03-03 | 1922-10-24 | Miehle Printing Press & Mfg | Suction sheet feeder |
DE412015C (en) * | 1925-04-08 | Fallert & Co Akt Ges | Device for removing individual sheets from a stack of sheets by means of a suction rod | |
GB674844A (en) * | 1948-04-22 | 1952-07-02 | Headley Townsend Backhouse | Improvements in or relating to sheet separating machines |
US2869867A (en) * | 1954-03-24 | 1959-01-20 | Backhouse Headley Townsend | Sheet separating machine |
US2941799A (en) * | 1956-04-30 | 1960-06-21 | Adolf C Reincke | Sheet material separator and handling device |
US2950913A (en) * | 1958-12-04 | 1960-08-30 | Harris Intertype Corp | Sheet feeding apparatus |
-
1959
- 1959-12-15 US US859807A patent/US3048391A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE412015C (en) * | 1925-04-08 | Fallert & Co Akt Ges | Device for removing individual sheets from a stack of sheets by means of a suction rod | |
US1433423A (en) * | 1921-03-03 | 1922-10-24 | Miehle Printing Press & Mfg | Suction sheet feeder |
GB674844A (en) * | 1948-04-22 | 1952-07-02 | Headley Townsend Backhouse | Improvements in or relating to sheet separating machines |
US2869867A (en) * | 1954-03-24 | 1959-01-20 | Backhouse Headley Townsend | Sheet separating machine |
US2941799A (en) * | 1956-04-30 | 1960-06-21 | Adolf C Reincke | Sheet material separator and handling device |
US2950913A (en) * | 1958-12-04 | 1960-08-30 | Harris Intertype Corp | Sheet feeding apparatus |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4869489A (en) * | 1987-04-01 | 1989-09-26 | Heidelberger Druckmaschinen Ag | Suction head with lifting suction devices |
US5137267A (en) * | 1989-11-21 | 1992-08-11 | Heidelberger Druckmaschinen Ag | Suction head for a feeder of a sheet-fed rotary printing press |
US5352086A (en) * | 1990-01-27 | 1994-10-04 | Georg Speiss Gmbh | Apparatus for lifting sheets from a stack |
US5350166A (en) * | 1990-07-13 | 1994-09-27 | Canon Kabushiki Kaisha | Sheet separating mechanism and method of flexing a sheet to facilitate separation from a stack |
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