GB2256829A - Cross-cutting webs; strippers - Google Patents

Cross-cutting webs; strippers Download PDF

Info

Publication number
GB2256829A
GB2256829A GB9212513A GB9212513A GB2256829A GB 2256829 A GB2256829 A GB 2256829A GB 9212513 A GB9212513 A GB 9212513A GB 9212513 A GB9212513 A GB 9212513A GB 2256829 A GB2256829 A GB 2256829A
Authority
GB
United Kingdom
Prior art keywords
cutting
counter cylinder
cylinder
counter
cam
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
GB9212513A
Other versions
GB2256829B (en
GB9212513D0 (en
Inventor
Johannes Richter
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 AG
Original Assignee
MAN Roland 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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of GB9212513D0 publication Critical patent/GB9212513D0/en
Publication of GB2256829A publication Critical patent/GB2256829A/en
Application granted granted Critical
Publication of GB2256829B publication Critical patent/GB2256829B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/54—Article strippers, e.g. for stripping from advancing elements
    • B65H29/56—Article strippers, e.g. for stripping from advancing elements for stripping from elements or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Details Of Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

2 __) 6 J 2 9 Device for Cross-Cuttinq Webs The invention relates to a
device for cross cutting webs which can be used, for instance, in web fed rotary printing machines.
It is known in cross-cutting devices to arrange several strippers adjacently on the counter cylinder, these strippers removing the cut sheets from the counter cylinder. The cut sheets are then further transported, for instance by means of belt systems, to a collecting cylinder.
In such a device there is a risk of jamming in the gap between the strippers and the casing of the counter cylinder.
It is the aim of the invention to produce a device for cross-cutting webs, in particular such a device having a counter cylinder carrying cutting strips, one or more cutting rollers arranged on the counter cylinder and a stripper, or several strippers set adjacently in the axial direction on the counter cylinder for removing the cut sheet, with which device the cut sheets can be reliably removed from the counter cylinder.
According to the invention there is thus provided a device for crosscutting webs, having a counter cylinder carrying a cutting strip, a cutting roller acting, in use, against the counter cylinder and a stripping means for removing the cut sheet from the counter cylinder, wherein the stripper projects into a circumferential groove in the counter cylinder, and the cutting strip is retractable as it passes the region of the stripping means.
This construction does away with the gap between the casing surface of the counter cylinder and the strippers, and hence the problem of jamming during sheet removal is removed.
The withdrawal of the or each cutting strip can 2- advantageously be carried out by mounting each cutting strip on a lever supported on a cam disc and pivotally mounted in the body of the counter cylinder.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made by way of example to the accompanying drawings, in which:
Fig. 1 shows a schematic side view of a device according to the invention, and Fig. 2 is a view of part of the device in Fig.
1 looking in the direction of the arrow Z.
Fig. 1 shows a schematic side-view of a crosscutting device. The crosscutting device shown contains a counter cylinder 1 on which first and second cutting rollers 2,3 are arranged each with circumferences corresponding to the respective cutting length. They each carry a cutting blade 4,5. The cutting blade 4 has a cutting edge with gaps corresponding to points where a group of moving belts 6 abutting the counter cylinder 1 passes the blade region. The cutting blade 5 also has gaps, but offset with respect to those of the cutting blade 4. In these gaps a group of moving belts 7 abutting the counter cylinder 1 passes the region of the blade 5 of the second cutting roller 3. Fig. 2 illustrates the way in which the two groups of belts 6,7 and gaps are offset.
The belts 6,7 pass round a common belt roller 8. The journals of the cutting rollers 2,3 and of the belt roller 8 each carry a gear wheel 9 to 11. By means of the gear wheel 9 the cutting roller 2 is in driving connection with a gear wheel 12 of the counter cylinder 1. The gear wheel 11 of the belt roller 8 is also in engagement with the gear wheel 12 and drives the cutting roller 3 by means of an intermediate shift wheel 13 and the gear wheel 10. The intermediate shift wheel 13 makes possible synchronisation from the first stage to the second stage.
The counter cylinder 1 carries several, in this case four, cutting strips 14, i.e. strip-shaped counter-surfaces for the blades 4,5, with a mutual circumferential spacing equal to the cutting length. Each cutting strip 14 is secured on a lever 15 which is pivotally mounted in the body of the counter cylinder 1 and rests on a stationary cam disc 16 via a cam roller 22. The counter cylinder 1 has several circumferential grooves 17 into each of which a stripper 18 extends so as to project radially inwardly of the surface of the counter cylinder. Following the strippers 18 is a group of moving belts 19 for conveying the cut sheets.
The web 20 to be crosscut, for instance a printed web 20 longitudinally folded by means of a former, runs, supported by the belts 21, into the gap between the counter cylinder 1 and the belts 6 and proceeds towards the first cutting cylinder 2. On the line of contact of the counter cylinder 1 and the cutting cylinder 2 the web 20 is partially cut by the cutting blade 4 in conjunction with a cutting strip 14, i.e. the interruptions in the cutting blade 4 leave bridge pieces in the cutting line on the web 20 which are not separated until they are cut by means of the cutting blade 5 of the second cutting roller 3 in conjunction with the same cutting strip 14. For further details of the two-stage cutting process reference may be made to our copending application based on DE 4120628.
The individual sheets now obtained are removed from the counter cylinder 1 by the strippers 18 projecting underneath the sheets and further transported by means of belts 7 and 19, for instance to a collecting cylinder. The shape of the cam 16 is such that the cutting strips 14 are controllably retracted 4- when passing the region of the strippers 18. This is carried out when the cam rollers 22 of the levers 15 run on the fixed cam disc 16 during rotation of the counter cylinder 1; as can be seen, the cam disc 16 has four raised portions and four valley portions, corresponding to the number of cutting strips 14 in this example.
In the embodiment shown two cutting rollers are arranged on the counter cylinder. Also within the scope of protection of the patent are crosscutting devices in which there is only one cutting roller on the counter cylinder. Also, while in the example described the means for lifting and retracting the cutting strips includes a cam disc, cam roller and pivoted mounting lever, it is clear that any suitable arrangement could be used for this purpose.
1

Claims (7)

Claims:
1. Device for cross-cutting webs, having a counter cylinder carrying a cutting strip, a cutting roller acting, in use, against the counter cylinder and a stripping means for removing the cut sheet from the counter cylinder, wherein the stripping means projects into a circumferential groove in the counter cylinder, and the cutting strip is retractable as it passes the region of the stripping means.
2. Device according to claim 1, wherein the cutting strip is pivotably mounted in the body of the counter cylinder and acted on by a cam so as to be retracted as aforesaid.
3. Device according to claim 2, in which the cutting strip is secured on a lever pivotably mounted in the counter cylinder and the cam includes a cam roller mounted on this lever and arranged to roll around a cam disc.
4. Device according to claim 1, 2 or 3, in which the stripping means comprises several axially spaced stripping elements and the counter cylinder has a corresponding number of the said grooves.
5. Device according to any preceding claim and having two cutting rollers each with a respective group of belts, wherein the two groups of belts loop around a common belt roller placed against the counter cylinder between the first and second cutting rollers.
6. Device according to claim 6, wherein a gear train is provided to connect the counter cylinder, the cutting rollers and the belt cylinder.
7. Device substantially as hereinbefore described with reference to the accompanying drawings.
GB9212513A 1991-06-22 1992-06-12 Device for cross-cutting webs Expired - Fee Related GB2256829B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914120629 DE4120629A1 (en) 1991-06-22 1991-06-22 DEVICE FOR CROSS-SHAPED TRACKS

Publications (3)

Publication Number Publication Date
GB9212513D0 GB9212513D0 (en) 1992-07-22
GB2256829A true GB2256829A (en) 1992-12-23
GB2256829B GB2256829B (en) 1994-09-07

Family

ID=6434510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9212513A Expired - Fee Related GB2256829B (en) 1991-06-22 1992-06-12 Device for cross-cutting webs

Country Status (4)

Country Link
JP (1) JPH05237792A (en)
DE (1) DE4120629A1 (en)
FR (1) FR2677968B1 (en)
GB (1) GB2256829B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7329219B2 (en) 2002-05-15 2008-02-12 Goss International Americas, Inc. Folding apparatus in a web-fed rotary printing press

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5865082A (en) * 1996-09-04 1999-02-02 Heidelberg Harris Inc. Apparatus for transporting signatures

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024173A (en) * 1978-06-27 1980-01-09 Olympus Optical Co Sheet stripper in electrophotographic apparatus
US4754962A (en) * 1986-11-04 1988-07-05 Owens-Illinois Plastic Products Inc. Apparatus for handling and stacking thin flexible objects

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB818190A (en) * 1955-11-16 1959-08-12 Holweg Const Mec Improvements in or relating to machines for cutting and folding strips delivered by rotary printing presses
DE3520963A1 (en) * 1985-06-12 1986-12-18 Albert-Frankenthal Ag, 6710 Frankenthal FOLDING APPARATUS
US4905599A (en) * 1988-06-13 1990-03-06 Am International, Inc. Notch cylinder unit
DE3900414A1 (en) * 1989-01-09 1990-07-12 Kloeckner Wilhelmsburger Gmbh Method for conveying a web through a transverse cutting device and a drum cutter
DE3904076A1 (en) * 1989-02-11 1990-08-16 Frankenthal Ag Albert FOLDING APPARATUS
DE3934673A1 (en) * 1989-10-18 1991-04-25 Man Miller Druckmasch CROSS-CUTTING DEVICE ADJUSTABLE IN FORMAT LENGTH FOR RUNNING PATHS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024173A (en) * 1978-06-27 1980-01-09 Olympus Optical Co Sheet stripper in electrophotographic apparatus
US4754962A (en) * 1986-11-04 1988-07-05 Owens-Illinois Plastic Products Inc. Apparatus for handling and stacking thin flexible objects

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7329219B2 (en) 2002-05-15 2008-02-12 Goss International Americas, Inc. Folding apparatus in a web-fed rotary printing press

Also Published As

Publication number Publication date
GB2256829B (en) 1994-09-07
FR2677968A1 (en) 1992-12-24
JPH05237792A (en) 1993-09-17
DE4120629C2 (en) 1993-05-06
FR2677968B1 (en) 1993-11-19
GB9212513D0 (en) 1992-07-22
DE4120629A1 (en) 1992-12-24

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Legal Events

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

Effective date: 19970612