EP0287563A1 - Perforation method and blanket for rotary printing machine provided with a perforation device, for example for offset machine. - Google Patents
Perforation method and blanket for rotary printing machine provided with a perforation device, for example for offset machine.Info
- Publication number
- EP0287563A1 EP0287563A1 EP19870900174 EP87900174A EP0287563A1 EP 0287563 A1 EP0287563 A1 EP 0287563A1 EP 19870900174 EP19870900174 EP 19870900174 EP 87900174 A EP87900174 A EP 87900174A EP 0287563 A1 EP0287563 A1 EP 0287563A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blanket
- printing
- groove
- perforating
- bar
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41G—APPARATUS FOR BRONZE PRINTING, LINE PRINTING, OR FOR BORDERING OR EDGING SHEETS OR LIKE ARTICLES; AUXILIARY FOR PERFORATING IN CONJUNCTION WITH PRINTING
- B41G7/00—Auxiliary perforating apparatus associated with printing devices
Definitions
- the present invention relates to a blanket for a rotary press machine, such as a sheet or continuous offset machine, equipped with a perforating device.
- the printed and perforated sheets are generally beaded enough in an automatic binder which must receive sheets of sheets perfectly “jogged” or centered and flat above, so that it is necessary to resume, by hand, Another factor in wasting time is the "jogging" or centering of stacked maL sheets.
- the object of the invention is in particular to remedy the abovementioned drawbacks of the perforation process according to which the teeth or cutting elements of the perforating threads are carried by the printing cylinder and applied against the blanket.
- this object is achieved thanks to a bLanchet provided with at least one groove opening on its active external face or printing surface and in the bottom of the panel is accommodated a bar or blade made in a hard material, this bar comprising an upper face against lacquer are intended to come into pressure
- the perforating or cutting elements of the perforating threads fixed to the printing cylinder of the machine, during the printing process.
- the blanket and the perforation process using it provide many advantages. They allow in particular: ⁇ a perfect perforation of the sheets, without blistering at the level of the perforations;
- FIG. 1 represents, dried atically, a rotary printing machine, of the offset type, with which the advantage is advantageously the blanchet and the perforation process according to the invention.
- Figure 2 is a plan view of a first embodiment of the bLanchet produced according to the invention.
- Figure 3 is a plan view of a second embodiment of the blanket according to the invention.
- Figure 4 is a perspective view of a bLanchet carrier cylinder provided with a blanket executed according to the invention.
- Figure 5 is an exploded perspective view illustrating the method of fixing the bar or non-compressible blade in the bottom of the throat of the bLanchet.
- FIG. 6 is an exploded detail view, in section and on a larger scale, also showing the embodiment of the groove with a reinforced bottom of the Lanchet.
- Figure 7 is a perspective view on a larger scale of a portion of perforating net intended to be fixed, removably, on the printing cylinder of the machine.
- Figure 8 is a detail view, in section and on a larger scale, of a blanket mounted on a blanket cylinder.
- Figure 9 is a detail view, in section and on a larger scale, of a perforating net installed on a printing cylinder, also called pressure or margin cylinder.
- FIG. 10 is a partial view, in section and on a larger scale, illustrating the perforation of a sheet of paper by the use of the blanket and the perforation method according to the invention.
- rotary printing machines such as offset machines of all kinds mainly comprising ( Figure 1) a plate cylinder 1 which are associated inking rollers 2 and dampening rollers 3, a blanket cylinder 4 and a printing cylinder 5 also called a pressure cylinder or margin cylinder, a feeding station 6 receiving the stacks of blank sheets 7 to be printed, and a receiving tray 8 on which stack The printed sheets. numbered and perforated 9, after their passage in the printing and punching assembly.
- a jogging device (not shown) ensures the correct stacking of the printed sheets, on the receiving board.
- the blanket cylinder 4 is intended for the removable mounting of the flexible blanket 10 made of rubber or elastomer with a very fine grain and perfectly regular and on which the pattern deposited on the plate is deposited on the plate installed on the plate cylinder 1, During the printing process, this pattern then transfers to the sheets of paper.
- the bLanchet 10 is provided with at least one groove 11 opening on its printing face and in the bottom of which is housed a bar 12 made of a hard and non-compressible material.
- the position of the groove or grooves 11 provided with a non-compressible bar 12 is a function of the location of the perforations to be executed on the award-winning sheets of paper.
- the groove 11 or each groove 11 is provided at a location intended to come into contact with the cutting elements of a perforating thread bonded to the printing cylinder, during the printing process, as is best seen from the which follows.
- a blanket 10 provided with a groove 11 with a reinforced bottom which is arranged parallel to the axis of the cylinders 1, 4, 5
- a blanket 10 provided with two parallel grooves 11 with reinforced bottom which are arranged in the direction ci con conferred when said blanket is mounted on the cylinder holder blanket.
- the blanket can also be equipped, at the same time, with one or more grooves with reinforced bottom oriented parallel to the axis of the cylinders, and with one or more grooves with reinforced bottom arranged in the opposite direction, as shown in FIG. 3.
- the or the grooves with a reinforced bottom 11-12 can be provided in any part of the external surface of the bLanchet, and according to any orientation or pattern, as required. It suffices, prior to the execution of the groove (s), to wear the usual and necessary marks on the blanket and to dig the said groove (s) at the locations of these marks.
- the longitudinal walls 11a of the groove or of each groove 11 have a divergent orientation in the direction of the printing surface 10a of the blanket
- the groove or each groove 11 can be executed during the manufacture of the blanket or later, as required, before use thereof.
- a layer 13 of a sealant such as a polyurethane varnish is applied to the bottom and the sides of the groove after it has been dug to the desired size and height.
- non-compressible bar 12 constituting the reinforced bottom of the groove or of each groove
- the bar 12 can be glued in the bottom of the groove 11, removably, by means of an adhesive strip 14 provided with two opposite Lantes self-adhesive faces and having a width and a length identical to those of said strip.
- the double-sided adhesive strip 14 is fixed, via one of its self-adhesive Lantes faces, to the bottom of the groove, while the bar is glued to said adhesive strip by means of the second face. self-adhesive of the latter.
- the bar 12 forming the bottom of the groove 11 is formed by a strip of material which is not compressible or has a very low degree of malleability, but whose hardness is however less than that of the teeth or cutting elements of the perforating nets intended to be glued to the printing cylinder 5 of the machine.
- the bar 12 can advantageously consist of a small blade or tinsel of brass.
- the upper face 12a of the non-compressible strip 12 housed in the groove 11 is set back relative to the active external surface or printing surface 10a of the bLanchet, so that a vacuum of height h is formed between said upper face 12a and the plane in which said printing surface 10a is located, so that the offset plate installed on the plate cylinder 1 can take place on said surface without encountering any relief.
- a perforating net 15 is removably fixed, for example by gluing, on the printing cylinder 5, at the desired location or locations, so that, during the rotation of the blanket cylinder 4 and of said printing cylinder, the teeth or cutting elements of said perforating net come to bear on the bar 12 reinforcing the bottom of the groove or grooves 11.
- This perforating net comprises a base 15a consisting of a steel nipple, the lower face of which is provided with a self-adhesive strip or layer 15b, the lower face of the latter being covered, before use. , by a removable protective film 15c. On its upper face, the base 15a is provided with teeth or cutting elements 15d aligned in the longitudinal direction of the said base.
- the active external face or printing surface 10a of the blanket 10 is barely less than or substantially equal to the height H of the perforating net 15 , so that sufficient pressure can be obtained from the end of the teeth or from the cutting edge of the cutting members 15d of said perforating thread on the upper face of said strip, making it possible to cut along the length of the teeth or a net perforation and perfect from the sheet of paper 16, without creating blisters or stain removal.
- FIG. 10 illustrates the implementation of the method of the invention.
- the sheet of paper 16 is pressed by the printing cylinder 5 provided with the perforating net 15, against the bLanchet 10 provided with a groove 11 equipped with a bar or lamella 12 non-compressible.
- the locations where said perforating net and said groove are placed come into tengential contact, the ends of the teeth or the cutting edges of the cutting elements of said perforating net are pressed against the upper face of the bar or strip 12, which causes the sectioning according to the length of the teeth or the clean and perfect perforation of the sheet of paper.
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Blanchet pour machine d'impression rotative, par exemple pour machine offset, équipée d'un dispositif de perforage, caractérisé en ce que ledit blanchet (10) est pourvu d'au moins une gorge (11) s'ouvrant sur sa face d'impression (10a) et dans le fond de laquelle est logée une barrette ou lamelle (12) réalisée dans un matériau dur et non compressible, cette barrette comportant une face supérieure (12a) contre laquelle sont destinés à venir en pression les éléments perforants ou coupants (15d) des filets perforants (15) fixés sur le cylindre d'impression (5), ou cylindre de pression, ou de marge, de la machine, lors du processus d'impression. L'invention vise également le procédé de perforage utilisant le blanchet défini ci-dessus, en association avec au moins un filet perforant (15) fixé sur le cylindre d'impression de la machine.Blanket for rotary printing machine, for example for offset machine, equipped with a perforating device, characterized in that said blanket (10) is provided with at least one groove (11) opening on its face printing (10a) and in the bottom of which is housed a bar or lamella (12) made of a hard, non-compressible material, this bar comprising an upper face (12a) against which the perforating or cutting elements are intended to come under pressure (15d) perforating nets (15) fixed on the printing cylinder (5), or pressure cylinder, or margin, of the machine, during the printing process. The invention also relates to the perforation process using the blanket defined above, in association with at least one perforating net (15) fixed on the printing cylinder of the machine.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87900174T ATE57136T1 (en) | 1985-12-24 | 1986-12-23 | PROCESS FOR PERFORATING AND PRINTING BLANKET FOR ROTARY PRINTING MACHINE WITH PERFORATING DEVICE, FOR EXAMPLE OFFSET PRESS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8519367 | 1985-12-24 | ||
FR8519367A FR2591943B1 (en) | 1985-12-24 | 1985-12-24 | PUNCHING PROCESS AND BLANKET FOR ROTARY PRINTING MACHINE EQUIPPED WITH A PUNCHING DEVICE OR ACCESSORY, FOR EXAMPLE FOR OFFSET MACHINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0287563A1 true EP0287563A1 (en) | 1988-10-26 |
EP0287563B1 EP0287563B1 (en) | 1990-10-03 |
Family
ID=9326277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870900174 Expired - Lifetime EP0287563B1 (en) | 1985-12-24 | 1986-12-23 | Perforation method and blanket for rotary printing machine provided with a perforation device, for example for offset machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0287563B1 (en) |
AU (1) | AU6839087A (en) |
DE (1) | DE3674807D1 (en) |
FR (1) | FR2591943B1 (en) |
WO (1) | WO1987003844A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2710291B1 (en) * | 1993-09-24 | 1995-11-17 | Walter Fruttiger | Method and device for protecting the blanket of an offset machine when using perforating nets, cutting nets or the like. |
GB0201471D0 (en) * | 2002-01-23 | 2002-03-13 | Post Press Products Ltd | Device for document preparation |
DE102007047172A1 (en) * | 2007-10-02 | 2009-04-09 | Manroland Ag | rubber sleeve |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2234141B1 (en) * | 1972-07-12 | 1973-11-29 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg |
-
1985
- 1985-12-24 FR FR8519367A patent/FR2591943B1/en not_active Expired
-
1986
- 1986-12-23 EP EP19870900174 patent/EP0287563B1/en not_active Expired - Lifetime
- 1986-12-23 AU AU68390/87A patent/AU6839087A/en not_active Abandoned
- 1986-12-23 WO PCT/FR1986/000445 patent/WO1987003844A1/en active IP Right Grant
- 1986-12-23 DE DE8787900174T patent/DE3674807D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8703844A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1987003844A1 (en) | 1987-07-02 |
FR2591943B1 (en) | 1988-03-18 |
DE3674807D1 (en) | 1990-11-08 |
EP0287563B1 (en) | 1990-10-03 |
AU6839087A (en) | 1987-07-15 |
FR2591943A1 (en) | 1987-06-26 |
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