US3335859A - Machine for sorting paper stacks - Google Patents
Machine for sorting paper stacks Download PDFInfo
- Publication number
- US3335859A US3335859A US488982A US48898265A US3335859A US 3335859 A US3335859 A US 3335859A US 488982 A US488982 A US 488982A US 48898265 A US48898265 A US 48898265A US 3335859 A US3335859 A US 3335859A
- Authority
- US
- United States
- Prior art keywords
- sheets
- stack
- sheet
- machine
- lifting devices
- 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
-
- 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
- B65H3/40—Separating articles from piles by two or more separators acting alternately on the same pile
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/26—Holders for containing light sensitive material and adapted to be inserted within the camera
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S209/00—Classifying, separating, and assorting solids
- Y10S209/922—Miscellaneous feed conveyors
Definitions
- the invention relates to a machine for sorting paper stacks, normally alternatively, but in exceptional cases also for irregularly stacked printed and interleaving sheets of the same sizes.
- the present invention has the object of rendering devices of known construction, such as so-called feeders, suitable for sorting sheets.
- this object may be realized in that the pneumatic lifting devices are associated with light sources and photoelectric cells which control the operation of the sheet lifting devices as a function of the differential brightness values of the sheet surfaces.
- the proper operation of the device according to the invention is guaranteed only if the stack or the topmost sheet at the time and the brightness value of which is to be detected by the photoelectric cells, are always moved into the same distance from these photoelectric cells.
- FIG. 1 is a side elevation of the paper stack sorting machine according to the invention
- FIG. 2 is a top view of the machine of FIG. 1.
- the paper stack sorting machine consists substantially of two identical feeder attachments which are so connected to one unit that their forwarding sides are oppositely directed.
- a stack elevator is provided in the centre of the machine.
- the paper stack to be sorted is shown at 1 and is fitted into the centre of the machine by means of a lateral stack feeder, not shown, and is lifted by means of the stack elevator 2, 3 until the topmost sheet is adjacent to the pneumatic lifting devices 4 and 5.
- the surface of the sheet is scanned by photoelectric cells 6 and 7 and the suction air of one of the lifting devices is controlled according to whether the topmost sheet is a printed or interleaving sheet.
- the mechanically alternating control of the devices would not be satisfactory since, with frequent use of the interleaving sheets, several of these are frequently deposited by the printing press between the printed sheets at the same time.
- the stack 1, comprising about 1000 printed and interleaving sheets each is not flat, owing to the fact that the paper is stretched during photogravure printing and the gripper edge has not been stretched.
- the stack sorting machine is equipped with a stack elevator, consisting of two independently operated chain elevators 2 and 3, each driven by a motor. Each motor is controlled by a scanner 9 and 10, respectively, so that the level gaps between the stack edges and the suction rods can be accurately observed. This is important for the good functioning of the photoelectric cells because these can scan the surface accurately only within a limited height range in order to control the suction air.
- a device as claimed in claim 1 characterized in that springs are provided on one side of one of the two lifting devices for retaining the sheet under the sheet to be detached and engaging through recesses in the sheet to be detached.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
Aug. 1 1967 c;' E. BORCHERT ETAL 3,335,859
MACHINE FOR SORTING PAPER STACKS 2 Sheets-Sheet 1 Filed Sept. 21, 1965 15, 1967 G- E. BORCHERT ETAL 3,335,859
MACHINE FOR SORTING PAPER STACKS Filed Sept. 21, 1965 2 Sheets-Sheet 2 United States Patent Pingel, Berlin, Germany, assignors to Bundesdruckerei, Berlin, Germany Filed Sept. 21, 1965, Ser. No. 488,982 Claims priority, application Germany, Sept. 21, 1964,
n 3 Claims. (Cl. 209--111.6)
The invention relates to a machine for sorting paper stacks, normally alternatively, but in exceptional cases also for irregularly stacked printed and interleaving sheets of the same sizes.
There are already known devices for lifting and transporting the uppermost sheet of a stack by means of two pneumatic lifting devices arranged on opposite sides of the stack which remove the sheet at choice towards different sides.
With steel plate photogravure printing, newly printed sheets should not be stacked on top of each other, because the inks have not fully dried when the sheets are laid off. It is therefore necessary to interleave special sheets of blotting paper in order to prevent transfer of the ink to the next sheet. This interleaving is effected automatically on the printing presses.
When the ink has reliably dried after a certain period, these interleaves must again be removed from the stack. Hitherto, this could be effected only by hand because known devices were incapable of meeting this requirement. Owing to the strong application required for steel plate photogravure printing, the interleaving sheets tend to adhere to the printed sheets. This is a further reason, why the extraction and sorting cannot be effected by machines.
The present invention has the object of rendering devices of known construction, such as so-called feeders, suitable for sorting sheets.
According to the invention, this object may be realized in that the pneumatic lifting devices are associated with light sources and photoelectric cells which control the operation of the sheet lifting devices as a function of the differential brightness values of the sheet surfaces.
However, the proper operation of the device according to the invention is guaranteed only if the stack or the topmost sheet at the time and the brightness value of which is to be detected by the photoelectric cells, are always moved into the same distance from these photoelectric cells.
For this reason, as already known from stack elevators for pneumatic sheet feeders, there are provided several independently operating and individually controlled chain elevators.
The invention will be further explained, by way of example, with reference to the accompanying drawing, in which:
FIG. 1 is a side elevation of the paper stack sorting machine according to the invention;
FIG. 2 is a top view of the machine of FIG. 1.
The paper stack sorting machine consists substantially of two identical feeder attachments which are so connected to one unit that their forwarding sides are oppositely directed. A stack elevator is provided in the centre of the machine.
The paper stack to be sorted is shown at 1 and is fitted into the centre of the machine by means of a lateral stack feeder, not shown, and is lifted by means of the stack elevator 2, 3 until the topmost sheet is adjacent to the pneumatic lifting devices 4 and 5. The surface of the sheet is scanned by photoelectric cells 6 and 7 and the suction air of one of the lifting devices is controlled according to whether the topmost sheet is a printed or interleaving sheet. The mechanically alternating control of the devices would not be satisfactory since, with frequent use of the interleaving sheets, several of these are frequently deposited by the printing press between the printed sheets at the same time. Since these interleaving sheets tend to adhere easily to the printed sheets and the type of paper is permeable to the suction air, it is necessary to prevent a printed sheet from being lifted at the same time. This is achieved by means of two springs 8 which engage into lateral recesses of the interleaving sheet on the side towards which the same is pulled off. These springs 8 retain the printed sheet under the interleaving sheet during the removal of the latter.
The stack 1, comprising about 1000 printed and interleaving sheets each is not flat, owing to the fact that the paper is stretched during photogravure printing and the gripper edge has not been stretched. In order to move the upper edges of both sides uniformly to the pneumatic lifting devices 4 and 5, the stack sorting machine is equipped with a stack elevator, consisting of two independently operated chain elevators 2 and 3, each driven by a motor. Each motor is controlled by a scanner 9 and 10, respectively, so that the level gaps between the stack edges and the suction rods can be accurately observed. This is important for the good functioning of the photoelectric cells because these can scan the surface accurately only within a limited height range in order to control the suction air.
What we claim is:
1. A device for lifting and removing the topmost sheet from a stack of sheets by means of two pneumatic lifting devices arranged on opposite sides of the stack which remove the selected sheet towards different sides, characterized in that for sorting different sheets, these pneumatic lifting devices are associated with light sources and photoelectric cells which control the operation of the lifting devices as a function of the differential brightness values of the surfaces of the sheets.
2. A device as claimed in claim 1, characterized in that the stack elevator is moved by two independently driven chain elevators, which are individually controlled by scanners.
3. A device as claimed in claim 1, characterized in that springs are provided on one side of one of the two lifting devices for retaining the sheet under the sheet to be detached and engaging through recesses in the sheet to be detached.
References Cited UNITED STATES PATENTS 2,626,147 l/l953 Gjostein 271-26 X 3,069,013 12/1962 Neubrech et al. 20911l.6 3,146,902 9/1964 Voelker 271-30 X 3,197,647 7/1965 Fraenkel 20911l.7 X 3,294,396 12/1966 Staines 27126 M. HENSON WOOD, In, Primary Examiner. J. N. ERLICH, Assistant Examiner.
Claims (1)
1. A DEVICE FOR LIFTING AND REMOVING THE TOPMOST SHEET FROM A STACK OF SHEETS BY MEANS OF TWO PNEUMATIC LIFTING DEVICES ARRANGED ON OPPOSITE SIDES OF THE STACK WHICH REMOVE THE SELECTED SHEET TOWARDS DIFFERENT SIDES, CHARACTERIZED IN THAT FOR SORTING DIFFERENT SHEETS, THESE PNEUMATIC LIFTING DEVICES ARE ASSOCIATED WITH LIGHT SOURCES AND PHOTOELECTRIC CELLS WHICH CONTROL THE OPERATION OF THE LIFTING DEVICES AS A FUNCTION OF THE DIFFERENTIAL BRIGHTNESS VALUES OF THE SURFACES OF THE SHEETS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB78606A DE1209126B (en) | 1964-09-21 | 1964-09-21 | Paper pile sorting machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US3335859A true US3335859A (en) | 1967-08-15 |
Family
ID=6979958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US488982A Expired - Lifetime US3335859A (en) | 1964-09-21 | 1965-09-21 | Machine for sorting paper stacks |
Country Status (3)
Country | Link |
---|---|
US (1) | US3335859A (en) |
DE (1) | DE1209126B (en) |
GB (1) | GB1078707A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030155284A1 (en) * | 2002-02-15 | 2003-08-21 | Hanson Bruce H. | Flat mail edge biasing machine and method of use |
US20060170144A1 (en) * | 2005-02-02 | 2006-08-03 | Xerox Corporation | System of opposing alternate higher speed sheet feeding from the same sheet stack |
US20060214352A1 (en) * | 2005-03-24 | 2006-09-28 | Xerox Corporation | Sheet feeding of faster rate printing systems with plural slower rate sheet feeders |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH651807A5 (en) * | 1983-03-31 | 1985-10-15 | Bobst Sa | DEVICE FOR CONTROLLING ORGANS DELIVERING SHEETS TAKEN FROM A CELL TO A MACHINE WORKING THEREWITH. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626147A (en) * | 1949-06-09 | 1953-01-20 | Fed Carton Corp | Jogging device for piled sheets |
US3069013A (en) * | 1960-05-18 | 1962-12-18 | Gardner Lab Inc | Photoelectric inspection system |
US3146902A (en) * | 1961-08-30 | 1964-09-01 | Saxton V Voelker | Envelope emptying and contents stacking machine |
US3197647A (en) * | 1961-04-20 | 1965-07-27 | Gunsons Sortex Ltd | Photosensitive apparatus for sorting translucent objects |
US3294396A (en) * | 1964-11-23 | 1966-12-27 | Harris Intertype Corp | Sheet feeding mechanism having a single control member for actuating a suction, air pressure, and pump means |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE51555C (en) * | J. MlS-SONG in Höchst a. M | Sheet feeding device | ||
DE1146507B (en) * | 1961-08-23 | 1963-04-04 | Mabeg Maschb G M B H Nachf Hen | Stack elevator for pneumatic sheet feeder |
-
1964
- 1964-09-21 DE DEB78606A patent/DE1209126B/en active Pending
-
1965
- 1965-09-21 US US488982A patent/US3335859A/en not_active Expired - Lifetime
- 1965-09-21 GB GB40121/65A patent/GB1078707A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626147A (en) * | 1949-06-09 | 1953-01-20 | Fed Carton Corp | Jogging device for piled sheets |
US3069013A (en) * | 1960-05-18 | 1962-12-18 | Gardner Lab Inc | Photoelectric inspection system |
US3197647A (en) * | 1961-04-20 | 1965-07-27 | Gunsons Sortex Ltd | Photosensitive apparatus for sorting translucent objects |
US3146902A (en) * | 1961-08-30 | 1964-09-01 | Saxton V Voelker | Envelope emptying and contents stacking machine |
US3294396A (en) * | 1964-11-23 | 1966-12-27 | Harris Intertype Corp | Sheet feeding mechanism having a single control member for actuating a suction, air pressure, and pump means |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030155284A1 (en) * | 2002-02-15 | 2003-08-21 | Hanson Bruce H. | Flat mail edge biasing machine and method of use |
US6926271B2 (en) * | 2002-02-15 | 2005-08-09 | Lockheed Martin Corporation | Flat mail edge biasing machine and method of use |
US20060170144A1 (en) * | 2005-02-02 | 2006-08-03 | Xerox Corporation | System of opposing alternate higher speed sheet feeding from the same sheet stack |
US7540484B2 (en) | 2005-02-02 | 2009-06-02 | Xerox Corporation | System of opposing alternate higher speed sheet feeding from the same sheet stack |
US20090236792A1 (en) * | 2005-02-02 | 2009-09-24 | Mandel Barry P | System of opposing alternate higher speed sheet feeding from the same sheet stack |
US7753367B2 (en) | 2005-02-02 | 2010-07-13 | Xerox Corporation | System of opposing alternate higher speed sheet feeding from the same sheet stack |
US20060214352A1 (en) * | 2005-03-24 | 2006-09-28 | Xerox Corporation | Sheet feeding of faster rate printing systems with plural slower rate sheet feeders |
US7934718B2 (en) | 2005-03-24 | 2011-05-03 | Xerox Corporation | Sheet feeding of faster rate printing systems with plural slower rate sheet feeders |
Also Published As
Publication number | Publication date |
---|---|
DE1209126B (en) | 1966-01-20 |
GB1078707A (en) | 1967-08-09 |
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