GB2316065A - Pneumatic sheet guiding device in a printing press - Google Patents

Pneumatic sheet guiding device in a printing press Download PDF

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Publication number
GB2316065A
GB2316065A GB9716570A GB9716570A GB2316065A GB 2316065 A GB2316065 A GB 2316065A GB 9716570 A GB9716570 A GB 9716570A GB 9716570 A GB9716570 A GB 9716570A GB 2316065 A GB2316065 A GB 2316065A
Authority
GB
United Kingdom
Prior art keywords
sheet
guide
guiding
pneumatic
brake
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.)
Granted
Application number
GB9716570A
Other versions
GB2316065B (en
GB9716570D0 (en
Inventor
Dieter Rejzek
Thomas Stock
Wilhelm Mitter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland Sheetfed GmbH
Original Assignee
Manroland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE19631598A priority Critical patent/DE19631598C2/en
Application filed by Manroland Druckmaschinen AG filed Critical Manroland Druckmaschinen AG
Publication of GB9716570D0 publication Critical patent/GB9716570D0/en
Publication of GB2316065A publication Critical patent/GB2316065A/en
Application granted granted Critical
Publication of GB2316065B publication Critical patent/GB2316065B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52Stationary guides or smoothers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/245Air blast devices
    • B65H29/246Air blast devices acting on stacking devices
    • B65H29/247Air blast devices acting on stacking devices blowing on upperside of the sheet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68Reducing the speed of articles as they advance
    • B65H29/683Slowing-down from chain delivery
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/60Other elements in face contact with handled material
    • B65H2404/61Longitudinally-extending strips, tubes, plates, or wires
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/10Means using fluid made only for exhausting gaseous medium
    • B65H2406/11Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/30Suction means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimension; Position; Number; Identification; Occurence
    • B65H2511/20Location in space
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00Problem to be solved or advantage achieved
    • B65H2601/20Avoiding or preventing undesirable effects
    • B65H2601/25Damages to handled material
    • B65H2601/251Smearing

Abstract

Sheet guiding elements 10.1, 10.2 are linked together and are adjustably mounted on a cross-member 14 transverse to the sheet running direction 9. The first part 10.1 comprises a flexible elastic tube with openings 17 for directing blown air from a controllable supply 11 to the underside of the sheets. A seal 12 separates the air in part 10.1 from that in part 10.2, which comprises a hollow tubular element with openings 19 also directed to the underside of the sheets either side of a sheet brake 7, and has a controllable compressed air supply 13. The guide directs printed sheets (2, Fig 1) held in a gripper system (3) contact-free over a sheet brake 7 into a stack (5).

Description

2316065 PNEUMATIC SHEET GUIDING DEVICE IIN A PRINTING PRESS This invention

relates to a pneumatic sheet guiding device for sheet guidance in a printing press.

A device of this type is known from EP 0 156 173 Bl. Fo smear-free sheet guidance between printing units or between printing unit and delivery, continuous guide surfaces are arranged with a plurality of bores. The bores can be subjected to suction and/or blown air by means of fans.

From DE 4 344 040 C1, a sheet guiding device for sheet feeding supported by blown air is known which has an upper part having blowing openings and a lower part, which parts are fixedly connected to one another. The upper part and lower part consist of flexible material wherein the flexibility of the lower part is substantially larger than the flexibility of the upper part. In a preferred embodiment, the upper part is made of steel sheet and the lower part of an elastomer. Thereby, the sheet guiding device is adjustable in the path of its curvature along the sheet feeding path.

Likewise displacement along the sheet feeding path is possible.

Furthermore, from EP 0 062 168 Bl, a sheet guiding device is known which has arched guide blowers between a sheet brake and a sheet guiding plate, the arched guide portions of which lie on the surface of the sheet guide plate. At the lower end of each arched guide a blowing nozzle is arranged from which air emerges counter to the sheet running direction. Thereby between the underside of the sheet and the upper side of the sheet guide plate, a reduced pressure is generated which sucks the sheets against the arched guide blowers. The arched guide blowers are adjustable along the sheet forwarding path dependent upon the format and transverse to the sheet running direction on a cross-member to enable them to be aligned with print-free zones.

None of the devices already known and referred to above is entirely satisfactory in practice, as they tend to give rise to a risk of smearing the freshly printed material. This is undesirable. We have now found that by careful use of pneumatic devices it is possible perceptibly to reduce the incidence of smearing of sheets printed on both sides by contact with sheet guiding elements.

According to there present invention there is provided a pneumatic sheet guiding device in a printing press for guiding one and double-sided sheets as they move along a sheet path internally of the press, the guiding device comprising a plurality of guide elements adjustable transversely to the sheet running direction wherein at least one of the guide elements is formed out of an essentially tubular elastic solid material with a plurality of relatively small openings which are arranged at distances and are directed towards sheets guided along the sheet path and wherein the guide element(s) is/are coupled with at least one controllable compressed air supply unit.

The invention is suitable for the smear-free sheet guidance between printing units or between a printing unit and a subsequently arranged delivery. Preferably the pneumatic guide element(s) provided in accordance with the invention is/are arranged in the delivery between fixed sheet guiding surfaces and an adjustable sheet brake. In this embodiment, the pneumatic sheet guide device follows the sheet brake along the sheet feeding path in its format dependent adjustment. Furthermore, in this connection, the sheet guide device in accordance with the invention is adjustable in its path of curvature on the basis of the flexibility as well as the matchability (?). With sheets produced by perfect printing, the smearing in the delivery is noticeably reduced. This is achieved, in particular, by the arranging the pneumatic sheet guide elements between fixed sheet guide surfaces and the sheet brake as well as furthermore making them extend in the sheet running direction past the sheet brake.

In this connection, the pneumatic sheet guiding device can be formed in one piece from an elastic tubular material which has a plurality of relatively small openings. The openings are directed substantially perpendicularly to the sheet which is guided along a sheet path.

In a further embodiment, the sheet guiding device can also be constructed in two parts. With the two part construction, the sheet guiding device preferably has a closure for the air feed with respect to both of the parts, so enabling each part to be controllable by a separate compressed air supply unit. Across the sheet width, several pneumatic guide elements can be arranged next door to one another or neighbouring a sheet brake.

The invention is explained in more detail with reference to an exemplary embodiment, shown diagrammaticaly in the accompanying drawings, in which:

Figure 1 shows a sheet delivery with guide surfaces, Figure 2 shows a sheet guiding device in accordance with the invention associated with a sheet brake, and Figure 3 shows the device according to Figure 2 in plan.

Referring to Figure 1, this shows diagrammatically a sheet delivery 1 arranged downstream of a finishing unit of an offset rotary printing press as seen in the sheet running direction 9. The sheet delivery 1 consists in known fashion of a circulating chain conveyor system 4 with gripper systems 3 arranged thereon. The gripper systems 3 transport sheets 2 in the sheet feed direction 9 from the finishing unit across a fixed sheet guide surface 8, past a sheet guiding device 10 in accordance with the invention and an associated sheet brake 7 along a sheet guiding path 16 (indicated in Figure 2) to a position above a delivery pile 5 on to which the sheets are deposited against stops. For diminishing the speed as well as for rapid deposition of the sheet 2 on the delivery pile 5, a controllable blown air device 6 is arranged in the delivery 1 above the delivery pile 5.

The pneumatic sheet guiding device 10 is arranged between a fixed sheet guide surface 8 which has openings which can be subjected to blown air and/or suction and the sheet brake 7 and extends by a defined amount past the sheet brake 7 in the sheet running direction 9. The sheet guiding device 10 is formed in accordance with the invention at least of an elastically deformable pressureresistant tubular guide element having along its length and flush with its outer wall a plurality of spaced relatively small openings 17,19, preferably introduced by needling or stamping at defined distances. The openings is 17, 19, in the present example at a spacing of ca. 15 mm and a diameter of less than 1 mm, are directed on to the underside of the sheet 2 as it is guided along the sheet feed path 16. The tubular material of the guide element 10 consists of a thermoplastic or elastomeric plastics, in the present example polyamide, and is closed at its end face adjacent the sheet brake 7.

Each sheet guide element 10 is constructed in two parts. A first part 10. 1 neighbouring the sheet guide surface 8 is formed by elastic tubular material, e.g. polyamide, with openings 17 directed to the underside of sheet 2. This first part 10.1 has a separate blown air supply 11 and is separated from the second part 10.2 by means of a seal 12. The second part 10.2 consists, e.g. of a hollow tubular element with openings 19 arranged substantially perpendicular relative to the underside of sheet 2 which, depending upon the size of the print-free positions, can also be arranged in the shape of areas.

For supporting sheet guidance, the second part 10.2 with the openings 19 extends in the sheet running direction 19 past the sheet brake 7 to a defined distance. The projecting distance or its shape is so configured, in this connection, that possible collision with the rear edge of a sheet 2 to be deposited is avoided. The second part 10.2 has a separate compressed air supply 13. The compressed air supplies 11, 13 are controllable independently with compressed air.

The second part 10.2 is fixed to a cross-member 14 by means of a releasable connection element 15. Both parts 10.1 and 10.2 of the pneumatic guiding element 10 are linked with one another in order that, e. g., the entire is sheet guiding device is adjustable dependent upon the format in or counter to the sheet running direction 9. Arranged transversely to the sheet running direction 19 are several guide elements 10 on the cross- member 14 at distances adjustably. The sheet brakes 7 are axially displaceable on their drive shaft dependent upon the printed image. Depending upon the surface weight of the sheet 2 to be guided, the compressed air supply units 11 or 13 are individually controlled.

Figure 3 shows the embodiment in accordance with the invention for sheet guidance of full surface printed sheets 2. Between the side frames 20 there are displaceably mounted the shaft for the sheet brake 7 as well as the cross-member 14 displaceably along the sheet feed path 16. Two sheet brakes 7 are positioned on the print-free side areas of sheet 2. In between them, three guide elements 10 are displaceably arranged on the crossmember 14. Each guide element 10 is divided into two arts 10.1 and 10.2, wherein the part 10.2 projects in the sheet running direction 9 past the sheet brake 7. The part 10.1 bridges the region between sheet brake 7 and the fixed sheet guide surface 8. The part 10.1 extends below the sheet guide surface 8 and is shifted longitudinally on any format determined adjustment of the sheet brake 7.

The mode of operation is as follows: By means of chain conveyor 4, each printed sheet 2 is fixed by means of gripper system 3 at its front edge and guided past the sheet brake 7 into the region of the delivery pile 5. The sheet guiding surfaces 8 are, in the case of a sheet 2 printed on both sides, preferably subjected to blown air which emerges via the openings 18 and guides the sheet 2 contact-free. The blowing air device 6 which acts from above on the sheet 2 is activated and operates with an airstream directed to the upper side of the sheet 2 to be deposited across its surface. In the region between fixed sheet guide surface 8 and the sheet brake 7, the sheet 2 is guided in contact-free fashion from the sheet guiding device or several sheet guiding devices in the form of guide elements 10 by means of air flowing out from the openings 17 along the sheet guide path and the sheet is decelerated at the sheet brake 7. The air flowing out is a relatively small quantity of air with a high flow speed preferably with a dominant proportion of laminar flow. Under high flow speed is meant a region of greater than 150 m/s. In the region of the sheet brake 7, the sheet 2 is guided supported by means of blown air flowing in finely metered fashion from the openings 19, but at print-free places sucked on by the sheet brake 7 in known fashion. The sheet brake 7 is, in this connection, positioned in known fashion on print-free zones of the sheet 2 while the pneumatic guide elements 10 are adjustable independently thereof. Particularly with full surface printing, a sheet brake 7 can be positioned in each case only at the side edges of sheet 2. In the intermediately lying free region, the sheet 2 tends to "slump" and without using the device in accordance with the invention, smears on the drive shaft of the sheet brake 7 with its printed side. The guide elements 10, in contrast, support the free lying region of the sheet 2 by 10 means of blown air and prevent the smearing off.

Claims (10)

Patent claims
1. A pneumatic sheet guiding device in a printing press for guiding one and double-sided sheets as they move along a sheet path internally of the press, the guiding device comprising a plurality of guide elements adjustable transversely to the sheet running direction wherein at least one of the guide elements is formed out of an essentially tubular elastic solid material with a plurality of relatively small openings which are arranged at distances and are directed towards sheets guided along the sheet path and wherein the guide element(s) is/are coupled with at least one controllable compressed air supply unit.
2. A pneumatic sheet guiding device according to Claim 1 wherein the elastic material of the guide element is an elastomer.
3. A pneumatic sheet guiding device according to Claim 1 wherein the elastic material of the guide element is a thermoplastic, preferably a polyamide.
4. A pneumatic sheet guiding device according to any one of Claims 1 to 3 wherein the guide elements are arranged in the sheet running direction between a fixed sheet guide surface and a sheet brake, and extend in the sheet running direction past the sheet brake with at least some of the openings in the guide element being downstream of the sheet brake.
5. A pneumatic sheet guiding device according to any one of the preceding Claims and wherein the guide element is formed of a first part and a second part, each part - being separately coupled to separate compressed air supply units.
6. A pneumatic sheet guiding device according to Claim 5 and wherein the second part of the guide element has openings both before and past the suction roller in the sheet running direction.
7. A pneumatic sheet guiding device according to Claim 5 or 6 wherein the second part of the guide element is constructed as a flat shaped element with a plurality of openings arranged at distances and directed towards a sheet.
8. A pneumatic sheet guiding device according to any one of the preceding Claims and wherein each guiding element is displaceable in or counter to the sheet running direction together with a sheet brake.
9. A pneumatic sheet guiding device according to any one of the preceding Claims and wherein the position of the guide element(s) is adjustable depending upon the printed image.
10. A pneumatic sheet guiding device in a sheetfed printing press substantially as hereinbefore described with reference to the accompanying drawings.
GB9716570A 1996-08-05 1997-08-05 Pneumatic sheet guiding device in a printing press Expired - Fee Related GB2316065B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19631598A DE19631598C2 (en) 1996-08-05 1996-08-05 Pneumatic sheet guiding device in a printing press

Publications (3)

Publication Number Publication Date
GB9716570D0 GB9716570D0 (en) 1997-10-08
GB2316065A true GB2316065A (en) 1998-02-18
GB2316065B GB2316065B (en) 1999-03-03

Family

ID=7801846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9716570A Expired - Fee Related GB2316065B (en) 1996-08-05 1997-08-05 Pneumatic sheet guiding device in a printing press

Country Status (4)

Country Link
JP (1) JP3068519B2 (en)
DE (1) DE19631598C2 (en)
FR (1) FR2751951B1 (en)
GB (1) GB2316065B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10144608B2 (en) 2015-06-29 2018-12-04 Koenig & Bauer, Ag Methods for operating a delivery device and delivery device for a sheet processing machine
US10150644B2 (en) 2015-06-29 2018-12-11 Koenig & Bauer Ag Delivery systems and methods for setting the delivery systems

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DE10239707B4 (en) * 2002-08-29 2007-09-20 Koenig & Bauer Aktiengesellschaft Device for storing sheets in the delivery of a sheet-processing machine
US7513499B2 (en) 2004-05-04 2009-04-07 Heidelberger Druckmaschinen Ag Sheet brake using a partitioned blower nozzle array
DE102005016783B4 (en) 2004-05-04 2019-02-14 Heidelberger Druckmaschinen Ag Sheet brake
DE102005031162B4 (en) * 2005-07-04 2016-12-01 Koenig & Bauer Ag Sheet brake in the delivery of a printing machine
KR100772923B1 (en) * 2006-08-23 2007-11-05 한국전자통신연구원 The system and method for executing application of server in mobile device
JP2008207370A (en) * 2007-02-23 2008-09-11 Mitsubishi Heavy Ind Ltd Sheet-fed press
DE102007061395B4 (en) * 2007-12-19 2019-06-13 Koenig & Bauer Ag Sheet guiding device in jibs of sheet-processing machines, in particular printing machines
JP5445870B2 (en) * 2011-11-28 2014-03-19 日高精機株式会社 Metal strip feeder
EP3271277B1 (en) 2015-06-29 2019-06-12 Koenig & Bauer AG Delivery device and method for operating a delivery device
DE102015212073B4 (en) * 2015-06-29 2019-01-17 Koenig & Bauer Ag Sheet guiding apparatus for a sheet processing machine and a method for conveying sheets of a sheet processing machine
DE102016211623A1 (en) 2015-06-29 2016-12-29 Koenig & Bauer Ag Delivery device and method for operating a delivery device
DE102015218146A1 (en) * 2015-09-22 2017-03-23 Koenig & Bauer Ag Delivery device and method for operating a delivery device
DE102016206692A1 (en) 2016-04-20 2017-10-26 Koenig & Bauer Ag Display of a sheet-processing machine with a sheet brake having brake stations and method for depositing sheets
DE102016209113A1 (en) * 2016-05-25 2017-11-30 Koenig & Bauer Ag Display device and method for operating a display device
DE102016209116A1 (en) 2016-05-25 2017-11-30 Koenig & Bauer Ag Sheet guiding device for a sheet-processing machine and method for operating a delivery device
DE102017204516A1 (en) * 2017-03-17 2018-09-20 Koenig & Bauer Ag Display of a sheet-processing machine with a sheet brake having brake stations and method for depositing sheets
DE102017218404B4 (en) 2017-10-13 2020-04-30 Koenig & Bauer Ag Delivery and method for depositing sheets in the delivery of a sheet processing machine with a sheet brake having brake stations

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EP0502417A1 (en) * 1991-03-05 1992-09-09 Koenig & Bauer Aktiengesellschaft Jet arrangement for guiding sheets in a sheet-fed rotary printing machine

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DE4426749A1 (en) * 1993-12-23 1996-02-01 Kba Planeta Ag Sheet guide for rotary sheet printing machine
DE4344040C1 (en) * 1993-12-23 1995-03-23 Kba Planeta Ag Pneumatic sheet-directing apparatus

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0502417A1 (en) * 1991-03-05 1992-09-09 Koenig & Bauer Aktiengesellschaft Jet arrangement for guiding sheets in a sheet-fed rotary printing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10144608B2 (en) 2015-06-29 2018-12-04 Koenig & Bauer, Ag Methods for operating a delivery device and delivery device for a sheet processing machine
US10150644B2 (en) 2015-06-29 2018-12-11 Koenig & Bauer Ag Delivery systems and methods for setting the delivery systems

Also Published As

Publication number Publication date
DE19631598C2 (en) 2000-02-17
GB2316065B (en) 1999-03-03
JPH1076634A (en) 1998-03-24
FR2751951A1 (en) 1998-02-06
GB9716570D0 (en) 1997-10-08
DE19631598A1 (en) 1998-02-12
JP3068519B2 (en) 2000-07-24
FR2751951B1 (en) 1999-08-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030805