[go: up one dir, main page]

US3554070A - Perforating strip for printing presses - Google Patents

Perforating strip for printing presses Download PDF

Info

Publication number
US3554070A
US3554070A US3554070DA US3554070A US 3554070 A US3554070 A US 3554070A US 3554070D A US3554070D A US 3554070DA US 3554070 A US3554070 A US 3554070A
Authority
US
United States
Prior art keywords
teeth
base portion
notches
strip
perforating
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
Application number
Inventor
Harry S Boyd
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3554070A publication Critical patent/US3554070A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4798—Segmented disc slitting or slotting tool
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4838—With anvil backup
    • Y10T83/4841—With resilient anvil surface
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9408—Spaced cut forming tool

Definitions

  • This invention relates to an improved perforating strip for printing presses. More particularly, the invention relates to a device for perforating paper as the paper passes over the impression cylinder of an offset or lithographic press, the device comprising an elongated thin metal strip having a base portion and having upstanding teeth along one edge of the base portion, the teeth being spaced apart from each other and the base portion having notches therein between the teeth so that the base portion is of reduced width at the notches, the notches providing relief of pressure of paper pressing against the teeth and base portion and permitting each of the teeth to flex individually.
  • the invention of this disclosure provides means of improving the performance of perforating strips of the type used to attach to impression cylinders of printing presses by overcoming the disadvantages of the prior disclosed types of perforating strips.
  • an object of this invention is to provide an improved perforating strip for use on impression cylinders of offset or lithographic presses for perforating paper passing through such presses.
  • a still more particular object of this invention is to provide an improved configuration of a perforating strip for attaching to the impression cylinder of an offset or lithographic press for perforating paperpassing through the press including means of reducing the pressureapplied against the edge of the strip and providing means wherein the teeth of the perforating strip can flex individually.
  • FIG. 1 is an isometric view of one embodiment of the improved perforating strip of this invention.
  • FIG. 2 is a side view showing the upstanding teeth along one edge of the base portion of the perforating strip of this invention.
  • FIG. 3 is a top view of the improved perforating strip of this invention.
  • FIG. 4 is a cross-sectional view taken along the line 4-4 of FIG. 3 and showing the configuration of the cross section as taken between upstanding teeth.
  • FIG. 5 is a cross-sectional view as taken along the line 5-S of FIG. 3 and showing the cross-sectional view of the perforating strip as taken through an upstanding tooth.
  • FIG. 6 is a fragmentary cross-sectional view of portions of an offset or lithographic press showing means whereby paper is perforated by the perforating strip of this invention.
  • the device is a unitary elongated thin metal strip having a base portion 10 and upstanding teeth 12.
  • the base portion I0 is of rectangular cross-sectional configuration having a flat upper surface 10A and flat lower surface 108.
  • the lower surface 108 is provided with means for affixing the strip to the impression cylinder of an offset or lithographic press, the most expeditious means of affixing the strip to a press being by use of adhesive.
  • an adhesive is applied to the lower-flat surface 108 covered by a removable cover treated so as not to adhere to the adhesive.
  • the base portion 10 has parallel edges 10C and "ID. Edge- 10C is provided with upstanding integral teeth 12. Each of the teeth 12 has an upper sharpened edge 12A which engages-and perforates the paper.
  • the perforating strip described up to this point is of a known arrangement such as previously disclosed in U.S. Pat. No. 2,842,202.
  • the invention herein includes the arrange- .ment wherein the teeth 12 have a space 14 therebetween and includes a notch 16 in the base portion 10 at eachof the spaces 14. By this arrangement, as best shown in FIGS. 3. 5
  • Notches 16 are preferably of V-shaped configuration as best shown in FIG. 3 with the apex 16A of the V'configuration being spaced from the plane of teeth 12. Such arrangement is not mandatory, however, as notches 16 may be V-shaped or of other configurations.
  • notches 16 at spaces 14 between teeth 12 performs two basic functions. First, as the teeth 12 engage and push through paper, the paper is severed, so that an extra thickness of paper tends to appear around each of the teeth 12. This extra thickness of paper applies, in the prior arrangement, to increased pressure against the base portion 10. By the provision in this invention of notches 16 in the base portion 10, the pressure against the base portion 10 of the perforating strip is reduced.
  • each tooth 12 is permitted to flex individually. This fiexure is distributed over a wider portion of the strip, the flexure being distributed over the portion from the notch apex 16A out to edge 10C. This provision for increased independent flexure of each tooth I2 spread over a wider area of base portion 10 reduces the opportunity for crystallization of the strip and insures longer useful life.
  • FIGS. 1, 2 and 3 show an arrangement wherein each tooth 12 is several times in length the space 14 between adjacent teeth. This is arbitrary. In some arrangements the length of teeth 12 and the length of space 14 may be more nearlyequal. In addition, tooth 12 is shown with an intermediaternotch '18. This is optional as the teeth 12 may be of a variety'of geometrical configurations depending upon several factors, including the size of perforations to be formed in the paper, the type of paper, speed of operation of the press, and the type of press to which the device is applied.
  • An improved perforating device for affixing to an impression'cylinder of an offset or lithographic press for perforating paper passing through the press comprising an elongated thin metal strip having a base portion of rectangular cross-sectional configuration havingflat upper and lower surfaces and paralleled edges, the lower flat surface being adaptable to be affixed to a press impression cylinder such as by adhesive, and

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

This invention relates to an improved perforating strip for printing presses. More particularly, the invention relates to a device for perforating paper as the paper passes over the impression cylinder of an offset or lithographic press, the device comprising an elongated thin metal strip having a base portion and having upstanding teeth along one edge of the base portion, the teeth being spaced apart from each other and the base portion having notches therein between the teeth so that the base portion is of reduced width at the notches, the notches providing relief of pressure of paper pressing against the teeth and base portion and permitting each of the teeth to flex individually.

Description

United States Patent Filed Harry S. Boyd 6409 S. Knoxville, Tulsa, Okla. 74135 776,831 Nov-.18, 1968 Jan. 12, 1971 lnventor Appl. No.
Patented PERFORATING STRIP FOR PRINTING PRESSES 2 Claims, 6 Drawing Figs.
2,863,337 12/1958 Ackley Primary ExaminerRobert E. Pulfrey Assistant Examiner-Clyde Coughenour AttorneyHead & Johnson ABSTRACT: This invention relates to an improved perforating strip for printing presses. More particularly, the invention relates to a device for perforating paper as the paper passes over the impression cylinder of an offset or lithographic press, the device comprising an elongated thin metal strip having a base portion and having upstanding teeth along one edge of the base portion, the teeth being spaced apart from each other and the base portion having notches therein between the teeth so that the base portion is of reduced width at the notches, the notches providing relief of pressure of paper pressing against the teeth and base portion and permitting each of the teeth to flex individually.
C ROSS-REFERENC E This disclosure is not related to any pending Unites States or foreign patent application.
BACKGROUND AND SUMMARY OF THE INVENTION Printers are frequently required to produce printed material requiring perforations so that users of the printed material 1 form the printing and perforation by two separate steps utilizing separate machines. To shorten the work involved in printing material including perforations, I devised a perforating strip which can be attached directly to the impression cylinder of an offset or lithographic press, the perforating strip being described in U.S. Pat. No. 2,842,202, issued Jul. 8, I958.
The perforating strip described in the above-mentioned patent has functioned completely satisfactorily and the use of such perforating strip by printers has become widespread. While the perforating strip disclosed in U.S. Pat. No. 2,842,202 has functioned satisfactorily, I have found that the invention can be improved upon, the improvement of such device being the subject matter of this disclosure.
In the perforating strip as disclosed in U.S. Pat. No. 2,842,202, the teeth which perfonn the perforations bottom against a metal base strip. As paper passes over the strip the teeth project into the paper causing the paper to separate and this separation causes some accumulation of paper thickness between the teeth. Thisadditional paperthickness causes increased pressure of the base portion of the strip. In addition, in
the arrangement wherein the teeth extend uprightly along one edge of thebase portion of the perforating strip the pressure of paper against the teeth tends to bend the entire edge portion and puts the entire edge portion under continuous stress which sometimes causes a crystallization of the material along the edge resulting in a failure of the strip in advance of its normal wear life. I
The invention of this disclosure provides means of improving the performance of perforating strips of the type used to attach to impression cylinders of printing presses by overcoming the disadvantages of the prior disclosed types of perforating strips.
It is thereforean object of this invention to provide an improved perforating strip.
More particularly, an object of this invention is to provide an improved perforating strip for use on impression cylinders of offset or lithographic presses for perforating paper passing through such presses.
A still more particular object of this invention is to provide an improved configuration of a perforating strip for attaching to the impression cylinder of an offset or lithographic press for perforating paperpassing through the press including means of reducing the pressureapplied against the edge of the strip and providing means wherein the teeth of the perforating strip can flex individually.
These and more specific objects of the invention will be understood by reference to thefollowing description and claims.
DESCRIPTION OF THE VIEWS FIG. 1 is an isometric view of one embodiment of the improved perforating strip of this invention.
FIG. 2 is a side view showing the upstanding teeth along one edge of the base portion of the perforating strip of this invention.
FIG. 3 is a top view of the improved perforating strip of this invention.
FIG. 4 is a cross-sectional view taken along the line 4-4 of FIG. 3 and showing the configuration of the cross section as taken between upstanding teeth.
FIG. 5 is a cross-sectional view as taken along the line 5-S of FIG. 3 and showing the cross-sectional view of the perforating strip as taken through an upstanding tooth.
FIG. 6 is a fragmentary cross-sectional view of portions of an offset or lithographic press showing means whereby paper is perforated by the perforating strip of this invention.
DETAILED DESCRIPTION Referring now to the drawings and first to FIGS. I, 2 and 3, the improved perforating strip of this invention is shown. The device is a unitary elongated thin metal strip having a base portion 10 and upstanding teeth 12. The base portion I0 is of rectangular cross-sectional configuration having a flat upper surface 10A and flat lower surface 108. The lower surface 108 is provided with means for affixing the strip to the impression cylinder of an offset or lithographic press, the most expeditious means of affixing the strip to a press being by use of adhesive. In preferred arrangements an adhesive is applied to the lower-flat surface 108 covered by a removable cover treated so as not to adhere to the adhesive. When the operator is ready to use the perforating strip the paper covering is pulled off and the strip stuck directly to the impression cylinder. I
The base portion 10 has parallel edges 10C and "ID. Edge- 10C is provided with upstanding integral teeth 12. Each of the teeth 12 has an upper sharpened edge 12A which engages-and perforates the paper.
The perforating strip described up to this point is of a known arrangement such as previously disclosed in U.S. Pat. No. 2,842,202. The invention herein includes the arrange- .ment wherein the teeth 12 have a space 14 therebetween and includes a notch 16 in the base portion 10 at eachof the spaces 14. By this arrangement, as best shown in FIGS. 3. 5
- and 6, the width of the base portion 10 taken between the in FIG. 6, by cementing the lower surface 108 to the surface of a printing press impression cylinder 20. The press platen 22 is covered with a rubber blanket 24 into which the teeth 12 of the perforating strip slightly extend as the platen and impres' sion cylinder are rotated against each other. Paper 26 passing between theplaten 22 and impression cylinder 20 is engaged by teeth 12 forming perforations 28 in the paper. Perforation is normally accomplished by use of the perforating strip of this invention concurrently with printing of paper 26 although it may be done as a separate process if desired.
Notches 16 are preferably of V-shaped configuration as best shown in FIG. 3 with the apex 16A of the V'configuration being spaced from the plane of teeth 12. Such arrangement is not mandatory, however, as notches 16 may be V-shaped or of other configurations.
The provision of notches 16 at spaces 14 between teeth 12 performs two basic functions. First, as the teeth 12 engage and push through paper, the paper is severed, so that an extra thickness of paper tends to appear around each of the teeth 12. This extra thickness of paper applies, in the prior arrangement, to increased pressure against the base portion 10. By the provision in this invention of notches 16 in the base portion 10, the pressure against the base portion 10 of the perforating strip is reduced.
In addition, in the prior arrangement wherein the edge of the base portion having the teeth is uninterrupted, the pressure against the perforating strip teeth tends to bend the entire edge of the strip as it is pressed against the rubber blanket of the platen. By the provision of notches 16, however, each tooth 12 is permitted to flex individually. This fiexure is distributed over a wider portion of the strip, the flexure being distributed over the portion from the notch apex 16A out to edge 10C. This provision for increased independent flexure of each tooth I2 spread over a wider area of base portion 10 reduces the opportunity for crystallization of the strip and insures longer useful life.
FIGS. 1, 2 and 3 show an arrangement wherein each tooth 12 is several times in length the space 14 between adjacent teeth. This is arbitrary. In some arrangements the length of teeth 12 and the length of space 14 may be more nearlyequal. In addition, tooth 12 is shown with an intermediaternotch '18. This is optional as the teeth 12 may be of a variety'of geometrical configurations depending upon several factors, including the size of perforations to be formed in the paper, the type of paper, speed of operation of the press, and the type of press to which the device is applied.
While the invention has been described with a "certain degree of particularity it is manifest that many changes may be made in the details of construction and the arrangement-of components without departing from the spirit and scope of this disclosure. It is understood that the invention'is not limited to the abstractherein, nor the embodiment which has been illustrated for purposes of 'exemplifying'the invention, but the invention is to be limited only by the scope of the attached claim or claims, including the full range of equivalency to which each element thereof is entitled.
I claim: 1. An improved perforating device for affixing to an impression'cylinder of an offset or lithographic press for perforating paper passing through the press comprising an elongated thin metal strip having a base portion of rectangular cross-sectional configuration havingflat upper and lower surfaces and paralleled edges, the lower flat surface being adaptable to be affixed to a press impression cylinder such as by adhesive, and
having integral upstanding teeth along one edge thereof extending substantially perpendicular to'said base portion, said teeth being spaced apart from each other, and said base portion having notches therein between'said teeth whereby said base portion is of reduced width at said notches, 'sa id notches ,permitting each of said teeth to flex individually as paper is forced thereagainst.

Claims (2)

1. An improved perforating device for affixing to an impression cylinder of an offset or lithographic press for perforating paper passing through the press comprising an elongated thin metal strip having a base portion of rectangular cross-sectional configuration having flat upper and lower surfaces and paralleled edges, the lower flat surface being adaptable to be affixed to a press impression cylinder such as by adhesive, and having integral upstanding teeth along one edge thereof extending substantially perpendicular to said base portion, said teeth being spaced apart from each other, and said base portion having notches therein between said teeth whereby said base portion is of reduced width at said notches, said notches permitting each of said teeth to flex individually as paper is forced thereagainst.
2. An improved perforating device according to claim 1 wherein said notches in said base portion between said teeth are of V-shaped configuration, the apex of the V-configuration being spaced from the plane of the teeth.
US3554070D 1968-11-18 1968-11-18 Perforating strip for printing presses Expired - Lifetime US3554070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77683168A 1968-11-18 1968-11-18

Publications (1)

Publication Number Publication Date
US3554070A true US3554070A (en) 1971-01-12

Family

ID=25108498

Family Applications (1)

Application Number Title Priority Date Filing Date
US3554070D Expired - Lifetime US3554070A (en) 1968-11-18 1968-11-18 Perforating strip for printing presses

Country Status (1)

Country Link
US (1) US3554070A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792637A (en) * 1972-06-07 1974-02-19 Container Graphics Corp Rotary die and cutting rule
US3995555A (en) * 1975-06-04 1976-12-07 Stewart Frank E Removable redeemable coupon for newspaper advertisements and method and apparatus for producing same
US4228735A (en) * 1978-01-19 1980-10-21 Laurent Doucet Offset duplicating machine
US4596546A (en) * 1982-05-17 1986-06-24 Rolf Schellenberg Process and apparatus for perforating, stamping or creasing of paper and cardboard in rotary printing presses
US4756245A (en) * 1984-06-12 1988-07-12 Yvan Roch Printing press having various printing heads
US4936214A (en) * 1987-01-09 1990-06-26 Innovative Graphic Industries Apparatus for adapting offset duplicator machines to accomodate numbering, printing, scoring, perforating and like device
US4962686A (en) * 1986-05-27 1990-10-16 Harry Boyd Perforating strip for printing presses
US4972747A (en) * 1986-05-27 1990-11-27 Harry Boyd Perforating strip for printing presses
US5123347A (en) * 1991-05-14 1992-06-23 Brown William R Scoring or perforating bar for offset presses
US5228388A (en) * 1991-05-14 1993-07-20 Brown William R Scoring or perforating bar for offset presses
US5509885A (en) * 1991-08-08 1996-04-23 Tetra Alfa Holdings & Finance S.A. Creasing apparatus
EP0832734A2 (en) 1996-09-30 1998-04-01 Winkler & Dünnebier Maschinenfabrik und Eisengiesserei GmbH Method and apparatus for producing transverse precreases, in particular on envelope blanks
DE19814966A1 (en) * 1998-04-03 1999-10-07 Friedrich Eicher Perforating, creasing or punching device for multi-color sheet-fed rotary printing machines
US6035753A (en) * 1996-09-05 2000-03-14 Ncr Corporation Perforation assemblies having variable cut to tie ratios for multi-ply forms
US6289777B1 (en) * 1997-06-06 2001-09-18 Kongg & Bauer Aktiengesellschaft Paper web for a web fed rotary printing press
US20070204738A1 (en) * 2006-03-01 2007-09-06 Frey Andrew P Perforation over perforation die cutter and method of manufacture
US20130260999A1 (en) * 2012-04-03 2013-10-03 The Boeing Company Open-core flywheel architecture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US714359A (en) * 1902-04-07 1902-11-25 John Brooks Disk cutter.
US2531841A (en) * 1948-06-16 1950-11-28 Florez Engineering Company Inc Disk blade for trimming book blocks
US2863337A (en) * 1953-05-11 1958-12-09 Hartnett Co R W Method of making a curved die
US3102632A (en) * 1959-07-16 1963-09-03 Samuel M Langston Co Edge piercing means and blank conveying means
US3147658A (en) * 1961-11-29 1964-09-08 Harry S Boyd Apparatus for perforating sheets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US714359A (en) * 1902-04-07 1902-11-25 John Brooks Disk cutter.
US2531841A (en) * 1948-06-16 1950-11-28 Florez Engineering Company Inc Disk blade for trimming book blocks
US2863337A (en) * 1953-05-11 1958-12-09 Hartnett Co R W Method of making a curved die
US3102632A (en) * 1959-07-16 1963-09-03 Samuel M Langston Co Edge piercing means and blank conveying means
US3147658A (en) * 1961-11-29 1964-09-08 Harry S Boyd Apparatus for perforating sheets

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792637A (en) * 1972-06-07 1974-02-19 Container Graphics Corp Rotary die and cutting rule
US3995555A (en) * 1975-06-04 1976-12-07 Stewart Frank E Removable redeemable coupon for newspaper advertisements and method and apparatus for producing same
US4228735A (en) * 1978-01-19 1980-10-21 Laurent Doucet Offset duplicating machine
US4596546A (en) * 1982-05-17 1986-06-24 Rolf Schellenberg Process and apparatus for perforating, stamping or creasing of paper and cardboard in rotary printing presses
US4756245A (en) * 1984-06-12 1988-07-12 Yvan Roch Printing press having various printing heads
US4962686A (en) * 1986-05-27 1990-10-16 Harry Boyd Perforating strip for printing presses
US4972747A (en) * 1986-05-27 1990-11-27 Harry Boyd Perforating strip for printing presses
US4936214A (en) * 1987-01-09 1990-06-26 Innovative Graphic Industries Apparatus for adapting offset duplicator machines to accomodate numbering, printing, scoring, perforating and like device
US5123347A (en) * 1991-05-14 1992-06-23 Brown William R Scoring or perforating bar for offset presses
US5228388A (en) * 1991-05-14 1993-07-20 Brown William R Scoring or perforating bar for offset presses
US5509885A (en) * 1991-08-08 1996-04-23 Tetra Alfa Holdings & Finance S.A. Creasing apparatus
US6035753A (en) * 1996-09-05 2000-03-14 Ncr Corporation Perforation assemblies having variable cut to tie ratios for multi-ply forms
EP0832734A2 (en) 1996-09-30 1998-04-01 Winkler & Dünnebier Maschinenfabrik und Eisengiesserei GmbH Method and apparatus for producing transverse precreases, in particular on envelope blanks
US6289777B1 (en) * 1997-06-06 2001-09-18 Kongg & Bauer Aktiengesellschaft Paper web for a web fed rotary printing press
DE19814966A1 (en) * 1998-04-03 1999-10-07 Friedrich Eicher Perforating, creasing or punching device for multi-color sheet-fed rotary printing machines
DE19814966C2 (en) * 1998-04-03 2000-03-09 Friedrich Eicher Perforating, creasing or punching device for single or multi-color sheet-fed rotary printing machines
US6651539B1 (en) * 1998-04-03 2003-11-25 Friedrich Eicher Perforating, grooving or cutting device for a multicolor sheet-fed rotary press
US20070204738A1 (en) * 2006-03-01 2007-09-06 Frey Andrew P Perforation over perforation die cutter and method of manufacture
US20130260999A1 (en) * 2012-04-03 2013-10-03 The Boeing Company Open-core flywheel architecture

Similar Documents

Publication Publication Date Title
US3554070A (en) Perforating strip for printing presses
US2842202A (en) Perforating strip
DE3880049D1 (en) DETACHABLE PRINTING UNIT FOR OFFSET PRINTING MACHINES.
EP0950925A3 (en) Plate making apparatus, printing method and printing apparatus, packing sheet material for printing plate material, and plate material placement method and apparatus
JP4047198B2 (en) Drilling device
US4962686A (en) Perforating strip for printing presses
US4972747A (en) Perforating strip for printing presses
US4936214A (en) Apparatus for adapting offset duplicator machines to accomodate numbering, printing, scoring, perforating and like device
GB2010186A (en) Apparatus for producing printed strips from a web of paper
US3340805A (en) Metal make-ready blanket
DE3682785D1 (en) Tear-off device for paper webs or single sheets in office machines, especially in matrix printers.
GB1560066A (en) Screen printing apparatus
US3312167A (en) Magnetic printing plate holder
US2167746A (en) Scoring means in printing presses
US417737A (en) Ralph meriman
US1965757A (en) Machine for printing postage stamps
US927873A (en) Printing form and type.
US1530083A (en) Type holder for printing presses
US1687404A (en) Paper-holding device
US1839292A (en) Feed board for printing presses
GB1175092A (en) Method and Device for Perforation During Printing
DE1923374C (en) Paint container for applying paint to a reciprocating gravure printing plate
US1796021A (en) Multigraph machine
US1910353A (en) Print guide
US3230882A (en) Sheet securing device having teeth to penetrate said sheet