GB2101029A - Apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry - Google Patents

Apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry Download PDF

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Publication number
GB2101029A
GB2101029A GB08128805A GB8128805A GB2101029A GB 2101029 A GB2101029 A GB 2101029A GB 08128805 A GB08128805 A GB 08128805A GB 8128805 A GB8128805 A GB 8128805A GB 2101029 A GB2101029 A GB 2101029A
Authority
GB
United Kingdom
Prior art keywords
radiation
web
cover plate
movement
opening
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
GB08128805A
Other versions
GB2101029B (en
Inventor
Peter Pinck
Elke Kohler
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.)
Koerber AG
Original Assignee
Hauni Werke Koerber and Co KG
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 Hauni Werke Koerber and Co KG filed Critical Hauni Werke Koerber and Co KG
Publication of GB2101029A publication Critical patent/GB2101029A/en
Application granted granted Critical
Publication of GB2101029B publication Critical patent/GB2101029B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • B23K26/0676—Dividing the beam into multiple beams, e.g. multifocusing into dependently operating sub-beams, e.g. an array of spots with fixed spatial relationship or for performing simultaneously identical operations
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/005—Treatment of cigarette paper
    • A24C5/007—Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1435—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow control means
    • B23K26/1438—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow control means for directional control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/1476—Features inside the nozzle for feeding the fluid stream through the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Abstract

The apparatus for perforating a strip 13 of wrapping material for rod-shaped articles of the tobacco processing industry consists of a radiation head 41a, 41b, 41c for focusing a coherent radiation (Laser) into the plane of running of a strip 13 of wrapping material and of a cover plate 48 which is spaced apart from and is located in front of the radiation head to constitute a guide for sliding movement of the strip of material. The cover plate has openings which constitute slots 79, which are disposed in the path of coherent radiation and which extend in the direction of movement of the strip of material. A gas stream is conveyed between the cover plate and the radiation head. <IMAGE>

Description

SPECIFICATION Apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry This invention relates to apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry.
In our copending Application No. 81 11551 we describe an apparatus for perforating a running web of material, especially a strip of wrapping material for rod-shaped arti- cles of the tobacco processing industry, with a radiation head which comprises an optical system for focusing a coherent radiation onto the material web portion to be perforated and which constitutes a closed housing containing the optical system and having a radiation admitting window, a radiation discharging opening which allows the issuance of a gas stream, and a gas admitting opening, with a cover plate which is spaced apart from and disposed in front of the radiation discharging opening, which is provided with an opening, which is provided with an opening disposed at a location in the path of radiation issuing from the radiation head and which defines with the housing or with a housing-surrounding carrier body a closed space having a gas evacuating opening, a pressure differential being establishable between the gas admitting opening of the radiation head and the gas evacuating opening of the closed space.
The apparatus according to the aforesaid application allows for continuous operation without contamination and without pronounced heating of the radiation head, with small space and material requirements. However, it has been found that, in the course of the perforating operation, small particles of combusted material which are propelled from the plane of the web of material tend to deposit in front of the radiation discharging opening of the radiation head, especially at those edges of the cover plate which are adjacent to the perforating station.
An object of the present invention is to improve the previously proposed apparatus in such a way that one reliably avoids contamination in the region in front of the radiation discharging opening of the radiation head by particles of combusted material which could adversely influence the progress of radiation to the web of material.
In accordance with the invention, this object is accomplished in that the opening which is provided in the cover plate in the path of radiation constitutes a slot extending in the direction of movement of the web of material.
The slot preferably extends beyond the radiation discharging opening, as considered in the direction of movement of the web of material.
In this manner, one prevents small particles of combusted material which develop in the course of the perforating operation from depositing along the edges of radiation transmitting openings which are provided in the cover plate. This also prevents partial or complete clogging of the opening which could lead to a weakening of radiation that effects the making of perforations and hence to an adverse influence upon the quality of the perforations.
If a carrier is provided with several radiation heads which are disposed one behind the other, as considered in the direction of movement of the web of material, a slot of the cover plate extends, in accordance with the invention, along the radiation discharging openings of several radiation heads.
If several radiation heads are installed in a carrier body in several neighboring rows in such a way that the radiation heads of each row are disposed one behind the other, as considered in the direction of movement of the web of material, and that the radiation heads of neighboring rows are staggered with reference to each other, as considered transversely of the direction of movement, the cover plate is provided in accordance with the invention with several slots each of which extends along the radiation discharging openings of a discrete row of radiation heads.
A further development of the invention consists in that the space which is located between the cover plate and the housing of a radiation head or the carrier body constitutes a channel into which extend the radiation discharging openings of the radiation heads and which is connected with means for maintaining the flow of a gas stream. In a particularly preferred embodiment of the invention, at least one channel extends between the cover plate and the carrier body in the direction of movement of the web of material, and the radiation discharging openings of all radiation heads which are disposed one behind the other and form a row extend into such channel, the channel being connected with means for maintaining the flow of a gas in the direction of movement of the web of material.
The means for maintaining a gas flow in the channel between the cover plate and the surface of the carrier body resp. the housing of the radiation head preferably comprises a source of compressed gas which is connected with the inlet of the channel, and a source of suction which is connected with the outlet of the channel.
In this manner, one can establish a closed path for the flow of gas through the channel.
Since a continuous gas stream is also guided through the radiation heads themselves in such a way that, in operation, a gas stream issues continuously from the radiation discharging opening and merges into the stream which is guided in the channel, one ensures a particularly reliable operation because not foreign bodies can reach the optical system on the one hand and the remnants of perforated portions are sucked up on the other hand.
A particular advantage of the apparatus which is proposed in accordance with the invention is considered to be that not only the radiation head itself remains free of small particles of combusted material but also those parts of the apparatus which are located in front of the radiation discharging opening of the radiation head, especially the radiation transmitting opening of the cover plate. The configuration of openings in the cover plate in the form of slots and the conveying of a gas stream through channels which extend in the direction of movement of the web of material entail rapid removal of small particles of com- busted material which develop in the course of the perforating operation so that such particles cannot deposit on those parts of the apparatus which are adjacent to the radiation heads.This ensures free passage of radiation to the web of material, even for long periods of time, and hence a defect-free perforating operation with practically total absence of the need for maintenance of the apparatus.
The invention will be explained in greater detail with reference to the embodiment which is illustrated in the drawing.
There are shown in: Figure 1 a sectional view of a perforating apparatus in accordance with the invention, and Figure 2 a plan view of an apparatus according to the invention in a schematic representation.
The embodiment shows a perforating apparatus which is designed specifically for use in filter tipping machines for the production of filter cigarettes wherein it serves to perforate a strip of tipping paper. However, this neither exhausts nor limits the possibilities of using the apparatus. The apparatus of the invention allows for the making of holes in a wide variety of material webs, for example, webs of paper, cardboard, cellophane, synthetic plastic material and others, independently of the type of machine.
The apparatus for perforating a strip 13 of tipping paper which is shown in Fig. 1 in a longitudinal sectional view consists of a carrier body 38 wherein radiation heads 41a, 41b and 41 c are disposed one after the other in the form of a row, as considered in the direction (arrow 15) of transport of the web 13 of material to be perforated. Each radiation head consists of a housing 42 which, in the illustrated case, is formed by the carrier body 38. Of course, the radiation head can also be formed as a self-sustaining structural element with its own housing and as such inserted into the carrier body. For reception of the radiation head, the carrier body 38 is formed with a bore into which is inserted a collector lens 46 constituting a radiation window and being held in a ring-shaped mount 45.The radiation discharging opening 44 is formed by a ring-shaped nozzle 47 which is also inserted into the bore of the carrier body 38. The ringshaped nozzle 47 and the lens 46, which constitutes the radiation admitting window, define an internal space 51 into which discharges a supply conduit 52 (compare Fig. 2) connected with a source 76 of compressed gas.
As shown in Fig. 2, a second row of radiation heads 39a, 39b and 39c is disposed in the carrier body 38 in substantial parallelism with the first row of radiation heads 41a, 41b, 41c.
The bores of the carrier body into which the radiation heads are inserted communicate with two parallel channels 68 and 68' which, in turn, communicate with a further channel 67 extending substantially at right angles thereto.
Means for splitting and deflecting the coherent radiation 69 to the radiation heads are provided in the channels 67, 68 and 68'. A semi-transmitting reflector 71' and a totally reflecting deflector 71 are inserted into the channel 67. These reflectors form two partial beams which are deflected into the two channels 68 and 68' extending at right angles to the channel. As can be seen especially in Fig.
1, the channels 68 in turn contain reflectors 72a, 72b and 72c which again split and deflect the respective partial beams. The reflector 72a is selected in such a way that it deflects one-third of the radiation intensity to the radiation head 41a and allows two-thirds of the beam to pass therethrough. The reflector 72b reflects one-half of the incident beam into the radiation head 41b and allows the other half of the beam to pass therethrough.
Such other half is reflected by the totally reflecting reflector 72c into the radiation head 41c. The collector lenses 46 of the radiation heads focus the incident beams 69 into the plane of the web 13 of material to be perforated.
In other words, this means that the focal points of the collector lenses 46 are located in the plane of the web 13 of material so that an accurately defined perforating action can take place in such plane. A laser 77 is provided to generate a bundle of coherent radiation, and the radiation issuing from the laser is directed into the radiation admitting inlet opening of the bore 67 after deflection by a reflector 78.
A cover plate 48 is mounted at a distance from and in front of the radiation discharging opening 44 of the ring-shaped nozzle 47. The outer side of the cover plate constitutes a slide surface for the web 13 of material to be perforated. In order to ensure unobstructed propagation of radiation to the web 13 of material to be perforated, the cover plate 48 is provided with openings which are located in the path of radiation 69 and which, according to the invention, constitute slots 79 and 79'.
The slots 79 and 79' extend in the direction of movement of the web 13 of material to be perforated, and each thereof extends over the radiation discharging openings 44 of all radiation heads 39a, 39b, 39c resp. 41a, 41b, 41 c which are disposed in a row one behind the other. As considered in the direction of movement of the web of material, the slots 79 and 79' terminate at a distance behind the radiation discharging opening of the last radiation head 39c resp. 41 c of the corresponding row of radiation heads.
The cover plate 48 on the carrier body 38 is curved, as considered in the direction of travel of the web 13 of material to be perforated, so that the web defines between the deflecting rolls 73 an arc to thus bear against the slide surface of the cover plate 48. This ensures predictable guidance of the material in the region of the radiation heads.
Two substantially parallel channels 81 and 81' extend between the cover plate 48 and the surface of the carrier body 38. The channels extend substantially in the direction of movement of the web 13 of material. They are arranged in such a way that the radiation discharging openings 44 of the radiation heads communicate with the channels. The inlets of the channels 81 and 81' are connected with a chamber 82 which is connected with a source 83 of compressed gas. The outlets of the channels communicate with a chamber 84 which is connected with a source 86 of suction.
A cover 87 is provided at that side of the web 13 of material which faces away from the radiation heads. The cover defines with the web of material resp. with the cover plate 48 a nearly closed space from which the particles of combusted material reaching this side of the web of material are directly evacuated by suction via one or more suction ports 88.
The mode of operation of the illustrated apparatus is as follows: While a web 13 of tipping paper which is to be perforated is guided by the deflecting rolls 73 and the arc over the slide surface of the cover plate 48 and is thereby held under tension so that it closely engages the slide surface of the cover plate 48 in the region of the radiation heads of the perforating apparatus, a coherent bundle 69 of radiation which preferably issues from a pulsed laser 77 is split and deflected and thereupon focused by the radiation heads into the plane of the web 13 of tipping paper whereby the web is perforated.
By selecting the pulse frequency of the laser radiation and the speed of transport of the strip of tipping paper, one can determine the spacing between the perforations which are formed in the strip of material. The two rows of radiation heads 39a, 39b and 39c as well as 41a, 41b and 41c are inclined with reference to the strip of wrapping material in such a way that there develop two stretches 75 and 75' each containing three rows of neighboring perforations (compare Fig. 2).
While the apparatus is in operation, a gas stream, air or protective gas, is conveyed from the source 76 of compressed gas by way of conduits 52 into the interior of the radiation heads and issues from the radiation discharg ing openings 44 of the radiation heads. This air stream prevents entry of small particles of combusted material, which develop in the course of the perforating operation, into and the contamination of radiation heads. At the same time, such air stream ensures adequate cooling of optical systems of the radiation heads.
A second air stream is established to flow from the source 83 of compressed gas through the chamber 82 and in the channels 81 and 81'. This air stream through the channels 81 and 81' guides the small particles of material which shoot off the web of material in the course of the perforating operation and which thus cannot deposit at the slot-shaped opening of the cover plate so that the particles flow through the suction chamber 84 and to the suction source 86. At the same time, small particles of combusted material which enter the space above the moving web of material are withdrawn through the suction ports 88. In this manner, one practically eliminates the possibility of contamination at this side of the web 13 of material which, in the long run, can lead to disturbances and require regular maintenance of the machine.
The design of radiation transmitting openings in the cover plate 48 in the form of slots and the conveying of a permanent air stream in the direction of movement of the web of material to be perforated into which merge the air streams issuing from the radiation heads ensure that contamination which develops in the course of the perforating operation cannot lead to interruptions of the beams of laser radiation and hence to interruptions of operation of the apparatus. Thus, the apparatus of the invention ensures a continuously uniform quality of the perforations while the extent of maintenance work upon the apparatus is held to a minimum.

Claims (6)

1. Apparatus for making holes in a sheetlike material, for example in a running web of wrapping material for rod-shaped articles which constitute or form part of smokers' products, comprising at least one source of coherent radiation, at least one perforating unit having a housing containing means for focusing coherent radiation furnished by said source upon the sheet-like material, the housing having radiation admitting inlet means, radiation discharging outlet means allowing the issuance of a gas stream and a gas admitting opening, a cover plate spaced in front of the radiation discharging outlet means and having an opening disposed in the path of radiation issuing from the outlet means, the cover defining with the housing or with a housing-surrounding carrier body a closed space having a gas evacuating opening, and means for establishing a pressure differential between the gas admitting opening of the housing and the gas evacuating opening of the closed space, wherein the opening which is provided in the cover plate in the path of radiation constitutes a slot extending in the direction of movement of the web of material.
2. Apparatus as claimed in claim 1, wherein the slot extends beyond the radiation discharging opening as considered in the direction of movement of the web of material.
3. Apparatus as claimed in claim 1 or 2, further comprising a carrier body with several radiation heads disposed one after the other, as considered in the direction of movement of the web of material, the slot of the cover plate extending beyond the radiation discharging openings of several radiation heads.
4. Apparatus as claimed in any one of claims 1 to 3, further comprising a carrier body of several neighbouring rows of several radiation heads each, which are disposed one behind the other, as considered in the direction of movement of the web of material, and are staggered with reference to each other as considered transversely of the direction of movement, the cover plate being provided with several neighbouring slots each of which extends along the radiation discharging openings of one row of radiation heads.
5. Apparatus as claimed in any one of claims 1 to 4, wherein at least one channel extends in the direction of movement of the web of material between the cover plate and the housing of a radiation head or a carrier body, the radiation discharging openings of all radiation heads which are disposed in a row one behind the other extend into the channel, and the channel is connected with means for maintaining a gas flow in the direction of movement of the web of material.
6. Apparatus for making holes in a sheetlike material, for example in a running web of wrapping material for rod-shaped articles which constitute or form part of smokers' products, substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB08128805A 1981-07-10 1981-09-23 Apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry. Expired GB2101029B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813127213 DE3127213A1 (en) 1981-07-10 1981-07-10 DEVICE FOR PERFORATING A HELLOW MATERIAL STRIP FOR ARTICLES OF THE TOBACCO PROCESSING INDUSTRY

Publications (2)

Publication Number Publication Date
GB2101029A true GB2101029A (en) 1983-01-12
GB2101029B GB2101029B (en) 1985-03-27

Family

ID=6136547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08128805A Expired GB2101029B (en) 1981-07-10 1981-09-23 Apparatus for perforating a strip of wrapping material for articles of the tobacco processing industry.

Country Status (4)

Country Link
JP (1) JPS589784A (en)
DE (1) DE3127213A1 (en)
GB (1) GB2101029B (en)
IT (1) IT1137861B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4824691A (en) * 1986-03-27 1989-04-25 The Wiggins Teape Group Limited Imaged microcapsule-coated paper
US4874919A (en) * 1987-01-14 1989-10-17 The Wiggins Teape Group Limited Laser apparatus for repetitively marking a moving sheet
US4961080A (en) * 1988-02-16 1990-10-02 The Wiggins Teape Group Limited Laser marker with mask scanning
EP0435747A1 (en) * 1989-12-28 1991-07-03 Framatome Laser head for working in a tube
US5352495A (en) * 1989-02-16 1994-10-04 The Wiggins Teape Group Limited Treatment of a surface by laser energy
WO2005070240A1 (en) * 2004-01-26 2005-08-04 Focke & Co. (Gmbh & Co. Kg) Device for producing cigarettes with a tip
EP2764948A1 (en) * 2010-06-01 2014-08-13 Perfo Knowledgy BV Apparatus for making perforations in a packaging material and method of adjusting such an apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120571A (en) * 1982-01-09 1983-07-18 日本特殊陶業株式会社 High-tenacity ceramic sintered body
US4533813A (en) * 1983-09-06 1985-08-06 Illinois Tool Works Inc. Optical selective demetallization apparatus
JPS6120684A (en) * 1984-07-10 1986-01-29 Japan Tobacco Inc Laser drilling device
JPS62143871A (en) * 1985-12-17 1987-06-27 東北セラミツク株式会社 Metal transfer or adhesion preventing tool
JPS63230294A (en) * 1987-01-20 1988-09-26 Jido Hosei Syst Gijutsu Kenkyu Kumiai Smoke removing device for laser beam machining apparatus
JPH0717379B2 (en) * 1990-06-07 1995-03-01 日本研磨材工業株式会社 Molten zirconia refractory material excellent in high temperature heat resistance and corrosion resistance, its manufacturing method, and continuous casting nozzle
DE69208453T2 (en) * 1991-12-31 1996-09-26 Eastman Kodak Co Zirconium ceramics and a process for its manufacture
JP2658809B2 (en) * 1992-08-27 1997-09-30 三菱電機株式会社 Laser processing equipment
KR950014721B1 (en) * 1992-11-14 1995-12-13 한국과학기술원 Method for coating of zirconia-alumina composite

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4824691A (en) * 1986-03-27 1989-04-25 The Wiggins Teape Group Limited Imaged microcapsule-coated paper
US4874919A (en) * 1987-01-14 1989-10-17 The Wiggins Teape Group Limited Laser apparatus for repetitively marking a moving sheet
US4961080A (en) * 1988-02-16 1990-10-02 The Wiggins Teape Group Limited Laser marker with mask scanning
US5352495A (en) * 1989-02-16 1994-10-04 The Wiggins Teape Group Limited Treatment of a surface by laser energy
EP0435747A1 (en) * 1989-12-28 1991-07-03 Framatome Laser head for working in a tube
FR2656557A1 (en) * 1989-12-28 1991-07-05 Framatome Sa LASER WORKING HEAD WITHIN A TUBE.
WO2005070240A1 (en) * 2004-01-26 2005-08-04 Focke & Co. (Gmbh & Co. Kg) Device for producing cigarettes with a tip
EP2764948A1 (en) * 2010-06-01 2014-08-13 Perfo Knowledgy BV Apparatus for making perforations in a packaging material and method of adjusting such an apparatus

Also Published As

Publication number Publication date
GB2101029B (en) 1985-03-27
IT1137861B (en) 1986-09-10
DE3127213A1 (en) 1983-01-27
IT8123457A0 (en) 1981-08-10
JPS589784A (en) 1983-01-20

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