US3858507A - Cylindrical stencil with plastic end rings - Google Patents

Cylindrical stencil with plastic end rings Download PDF

Info

Publication number
US3858507A
US3858507A US348979A US34897973A US3858507A US 3858507 A US3858507 A US 3858507A US 348979 A US348979 A US 348979A US 34897973 A US34897973 A US 34897973A US 3858507 A US3858507 A US 3858507A
Authority
US
United States
Prior art keywords
outer diameter
end ring
perforate
portions
cylindrical
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
US348979A
Other languages
English (en)
Inventor
Erling Owren
William Mcelroy
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.)
Cranston Print Works Co
Original Assignee
Cranston Print Works Co
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 Cranston Print Works Co filed Critical Cranston Print Works Co
Priority to US348979A priority Critical patent/US3858507A/en
Priority to IT70638/73A priority patent/IT999950B/it
Priority to GB5738473A priority patent/GB1432858A/en
Priority to CH18274A priority patent/CH573308A5/xx
Priority to JP49006096A priority patent/JPS5852836B2/ja
Priority to DE2401575A priority patent/DE2401575C2/de
Priority to FR7411458A priority patent/FR2224298B1/fr
Priority to NL7404408A priority patent/NL7404408A/xx
Priority to BE142718A priority patent/BE813145A/xx
Priority to CA196,576A priority patent/CA1009505A/en
Priority to AT291274A priority patent/AT331277B/de
Application granted granted Critical
Publication of US3858507A publication Critical patent/US3858507A/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/38—Screens, Frames; Holders therefor curved
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/15—Roller structure

Definitions

  • ABSTRACT An end ring for supporting a thin, perforate cylindrical printing member the end ring having printing member supporting and securing structure comprising integral electrical insulating plastic first, second, third, and fourth coaxial cylindrical portions.
  • the first and third portions have a first outer diameter substantially equal to the inner diameter of the perforate member.
  • the second portion has an outer diameter less than that first outer diameter and also has a roughened outer cylindrical surface
  • the fourth portion has an outer diameter equal to the outer diameter of the perforate member
  • a printing r011 unit comprising a cylindrical perforate member secured, at each end, to such an end ring by an adhesive disposed on the roughened surface of the end rings second portion.
  • This invention relates to printing or coloring opera tions in which a cylindrical perforate printing member is employed, and, more particularly, to the support and reinforcement of such a cylindrical perforate printing member.
  • Printing apparatus employing such printing members is discussed in Van Der Winden, U.S. Pat. No. 3,304,860.
  • a printing roll has heretofore comprised a nickel screen supported on aluminum end rings.
  • the useful lifetime of rolls employing this construction has been limited by at least three problems: loosening of the end rings, damage to screens when printing Azoic colors, and damage to screens when printing cationic or basic colors.
  • Principal objects of the present invention are the provision of improved support for such a printing member so as to simplify the manufacture, and prolong the useful lifetime, of a printing roll comprising such a member and the means of support.
  • the loose end ring problem has typically involved separation of the end ring from the screen due to failure of the adhesive bond.
  • the solution which reduced loose end rings to a minimum was use of an end ring formed from a plastic material.
  • the improvement is apparently the result of increased bonding surface on the end ring, improved adhesion of the adhesive (e.g., Epoxy). to the plastic, and a true round end ring (as compared to offround" for the aluminum end rings).
  • the solution was found in a plastic end ring. Being non-conductive, the plastic end rings served to eliminate the cell by electrically isolating the nickel screen.
  • the problem of damaged screens in the printing of cationic or basic colors was also resolved by discovery of the existance of a galvanic cell involving the conventional aluminum end ring as the cathode, the nickel screen as the anode, and the acid printing paste as the electrolyte.
  • the acids generally used include Acetic, Citric and Ammonium Sulfate.
  • the action which takes place has been discovered to be a deplating of nickel from the screen. Measurements have been made of nickel screen thickness to show the thickness reduced from an original 0.003/0.0035 inch down to 0.00l/0.0()l5 inch. At the reduced thickness, the screen cannot support the torque action of printing or even its own weight and collapses.
  • the galvanic cell involved in the printing of cationics is the reverse of that in the case of Azoic colors.
  • the development and use of plastic end rings solved this problem also by eliminating the cell in isolating the nickel screen electrically.
  • an end ring for supporting a thin, perforate, cylindrical printing member.
  • the end ring is made from an insulating plastic and comprises first, second, third, and fourth coaxial cylindrical portions.
  • the first and third portions have a first outer diameter substantially equal to the inner diameter of the perforate member and the fourth portion has an outer diameter substantially equal to the outer diameter of the perforate member.
  • the second cylindrical portion has an outer diameter less than the outer diameter of the first cylindrical portion and has a roughened outer cylindrical surface, thereby providing an appropriate surface for receiving an adhesive for bonding'of the perforate member to the end ring.
  • the outer diameter of the second portion is approximately 0.020 inch less than the outer diameter of the first portion; each of the first and third portions has an axial length equal to at least one half the axial length of the second portion; and the first portion is greater in axial length than the second portion.
  • a printing roll unit which comprises a thin, perforate, metallic, open-end cylindrical member having a predetermined inner diameter anda predetermined outer diameter.
  • the roll also comprises a pair of unitary insulating plastic end rings disposed respectively in the open-ends of the perforate member.
  • each ring comprises first, second, third, and fourth coaxial cylindrical portions having diameters and surfaces as described above.
  • An adhesive is disposed on the roughened surface of the second portion and contacts the portion of the perforate member overlying that surface.
  • FIG. 1 is a side elevation of a printing roll unit constructed according to the present invention
  • FIG. 2 is a sectional view through the axis of an end ring constructed according to the invention.
  • FIG. 3 is an enlarged view of the perforate member supporting and securing portion of the end ring of FIG.
  • a printing roll unit 10 comprises a thin, cylindrical, metallic (e.g., nickel), perforate member 12 with end rings 14 disposed within each of the open-ends of the member 12.
  • the unit 10 is supported in a printing apparatus in a conventional fashion for rotation and a conventional system for supplying printing fluid to the interior of the screen is also provided.
  • the member 12 is simply a screen having portions of its surface open to the flow of printing fluid from the interior to the exterior of the screen and portions masked. Occasionally the member 12 may be a delicate, thin walled cylindrical member rather-than a true screen.
  • each end ring 14 is made from polyterephthalate and comprises a supporting and securing portion 16 which is inserted into the open-end of the perforate member 12.
  • the end ring 14 also includes a portion 18 for engagement,'in a conven tional fashion, with the apparatus which actually rotates the unit 10, as well as a transition portion 20 between portions 16 and 18.
  • the end ring 14 is rotationally symmetrical, with the portions 16, 18, 20 having a common axis 22 (see FIG. 2).
  • the portion 16 itself comprises first, second, third, and fourth coaxial portions 24, 26, 28 and 30 respectively.
  • the portions 24 and 28 act as supports for the perforate memberl2 and thus have an outer diameter substantially equal to the inner diameter of the member 12 (e.g.,'in one particular preferred embodiment, approximately 8 inches).
  • the surface 32 of portion 30 is raised above the surface 34 of portion 28 by a distance approximately equal to the thickness of the member 12, to provide a smooth outer surface for the unite 10 as a whole.
  • the exposed shoulder 36 between surfaces 32 and 34- also acts as a stop for the edge of the perforate member 12. With a typical thickness of the member 12 of 0.003 to 0.0035 inch, the outer diameter of portion 30 would thus be approximately 0.007 inch greater than the outer diameter of portions 24 and 28.
  • the portion 26 is of reduced diameter, having its surface 38 approximately 0.010 inch below surface 34. Portion 26 thus has an outer diameterwhich is approximately 0.020 inch less than the outer diameter of portions 24 and 28. Additionally, the surface 38 is roughened compared to the remaining surfaces of the molded plastic end ring 14. This is indicated in FIG. 1 by the shading of surface 38.
  • portions 24 and 28 have an axial length preferably at least half as long as the portion 26, the portion 24 is actually of greater axial length than portion 26.
  • an adhesive 40 is disposed on the surface 38 having sufficient mass to fill the shallow depression of portion 26 and contact the'overlying portion of the perforate member 12 to secure the perforate member to the end ring 14.
  • a suitable adhesive is Scotchweld 1751A or 1751B available from 3-M Company.
  • the delicate perforate member 12 will be supported by portions 24 and 28 on each side'of the screen segment which is bonded to the end ring '14 (i.e., that portion of the screen overlying surface 38).
  • the substantial axial length of the support portions 24 and 28, and especially the extensive length of portion 24, prevent stresses within the delicate member 12 from causing a buckling" or bending of the member 12 in the region above surface 38 during or after the setting of the adhesive.
  • the roughening of surface 38 furthermore, provides for an increased strength of the bond between the adhesive and the member 14.
  • the shoulder 36 at the interface of portions 28 and 30, causes the end rings 14 and the member 12 to act as a unit in relation to any axial forces.
  • portions 28 and 30, therefore, prevents substantially all axial forces from being transmitted from end ring to screen (or vice versa) through theadhesive 40 and thus by preventing shearing forces from acting on the hand between adhesive 40 and delicate perforate'member 12 provides for a prolonged lifetimeof the bond produced I by the adhesive.
  • unitary end rings formed from plastic in general, and polyterephthalate in particular has itself increased the useful lifetime of printing roll units.
  • An end ring for supporting a thin, perforate cylindrical printing member the end ring having printing member supporting and securing structure comprising integral electrically insulating plastic first, second, third, and fourth coaxial cylindrical portions, said first and third portions having a first outer diameter substantially equal to the inner diameter of said perforate member, said second portion having an outer diameter less than said first outer diameter and also having a roughened outer cylindrical surface, and said fourth portion having an outer diameter equal to the outer diameter of said perforate member.
  • each of said first and third portions has an axial length equal to at least one half the axial length of said second portion.
  • a printing roll unit comprising:
  • a thin, perforate, open-end cylindrical member having a predetermined inner diameter and a predetermined outer diameter
  • each end ring comprises first, second, third and fourth coaxial cylindrical portions, said first and third portions having outer surfaces in contact with the inner surface of said perforate member, said second portion having an outer diameter less than said perforate member inner diameter and having its outer surface roughened, and said fourth portion having an outer diameter equal to said perforate member outer diameter; said adhesive disposed on said roughened outer surface of said second portion and contacting the portion of said perforate member overlying that surface.
  • each of said first and third portions has an axial length equal to at least one half the axial length of said second portion.
  • each end ring is formed from polyterephthalate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Screen Printers (AREA)
US348979A 1973-04-09 1973-04-09 Cylindrical stencil with plastic end rings Expired - Lifetime US3858507A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US348979A US3858507A (en) 1973-04-09 1973-04-09 Cylindrical stencil with plastic end rings
IT70638/73A IT999950B (it) 1973-04-09 1973-12-11 Anello terminale per organi di stam pa e cilindro da stampa comprenden te tale anello
GB5738473A GB1432858A (en) 1973-04-09 1973-12-11 Printing member with plastics end ring
CH18274A CH573308A5 (enrdf_load_stackoverflow) 1973-04-09 1974-01-08
JP49006096A JPS5852836B2 (ja) 1973-04-09 1974-01-11 印刷用ロ−ルユニットにおけるプラスチック材料製端部リング
DE2401575A DE2401575C2 (de) 1973-04-09 1974-01-14 Endring zum Halten einer zylindrischen Siebschablone
FR7411458A FR2224298B1 (enrdf_load_stackoverflow) 1973-04-09 1974-03-29
NL7404408A NL7404408A (enrdf_load_stackoverflow) 1973-04-09 1974-04-01
BE142718A BE813145A (fr) 1973-04-09 1974-04-01 Rouleau d'impression et bagues d'extremite destinees a le supporter
CA196,576A CA1009505A (en) 1973-04-09 1974-04-02 Printing member with plastic end ring
AT291274A AT331277B (de) 1973-04-09 1974-04-08 Endring fur siebdruckwalzen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348979A US3858507A (en) 1973-04-09 1973-04-09 Cylindrical stencil with plastic end rings

Publications (1)

Publication Number Publication Date
US3858507A true US3858507A (en) 1975-01-07

Family

ID=23370385

Family Applications (1)

Application Number Title Priority Date Filing Date
US348979A Expired - Lifetime US3858507A (en) 1973-04-09 1973-04-09 Cylindrical stencil with plastic end rings

Country Status (11)

Country Link
US (1) US3858507A (enrdf_load_stackoverflow)
JP (1) JPS5852836B2 (enrdf_load_stackoverflow)
AT (1) AT331277B (enrdf_load_stackoverflow)
BE (1) BE813145A (enrdf_load_stackoverflow)
CA (1) CA1009505A (enrdf_load_stackoverflow)
CH (1) CH573308A5 (enrdf_load_stackoverflow)
DE (1) DE2401575C2 (enrdf_load_stackoverflow)
FR (1) FR2224298B1 (enrdf_load_stackoverflow)
GB (1) GB1432858A (enrdf_load_stackoverflow)
IT (1) IT999950B (enrdf_load_stackoverflow)
NL (1) NL7404408A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117779A (en) * 1975-09-03 1978-10-03 Stork Brabant B.V. Means to provide uniform lengthwise squeegee angle of attack
US4272872A (en) * 1978-02-14 1981-06-16 Fritz Buser Maschinenfabrik Ag Device for holding a thin-walled metal cylinder
US4914478A (en) * 1985-01-16 1990-04-03 Canon Kabushiki Kaisha Image holding member
US5410963A (en) * 1994-05-03 1995-05-02 Squarmount, Inc. Backing blanket for printing plates
EP0743180A3 (en) * 1995-05-17 1996-11-27 Eredi Di Bernasconi Fausto Unmachined die-cast aluminium end ring for a cylindrical screen
EP1208953A3 (en) * 2000-08-02 2003-07-23 Tecno - Europa S.R.L. Decorating means
WO2009006717A3 (en) * 2007-07-09 2009-03-05 Paulo Roberto Lourenco System for printing of big formats in fabrics and dispositive for printing of big formats in fabrics

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5341492U (enrdf_load_stackoverflow) * 1976-09-10 1978-04-10
JPS5664897A (en) * 1979-10-31 1981-06-02 Osaka Shiiring Insatsu Kk Screen plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3304860A (en) * 1963-09-12 1967-02-21 Stork & Co Nv Screen printing machine and cylindrical screen mounting
US3556004A (en) * 1967-05-26 1971-01-19 Zimmer Johannes Device on rotary printing machines
US3565001A (en) * 1967-02-15 1971-02-23 Peter Zimmer Rotary screen printing machine
US3599565A (en) * 1967-09-26 1971-08-17 Fritz Buser Ag Fa Rotary seen printing machine with improved mounting for the screen
US3608482A (en) * 1969-10-31 1971-09-28 American Screen Process Equip Locking bar for screen-printing frame

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT252282B (de) * 1963-07-11 1967-02-10 Peter Zimmmer Vorrichtung zum Aufspannen eines Schablonenzylinders
NL6910509A (enrdf_load_stackoverflow) * 1969-07-09 1971-01-12

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3304860A (en) * 1963-09-12 1967-02-21 Stork & Co Nv Screen printing machine and cylindrical screen mounting
US3565001A (en) * 1967-02-15 1971-02-23 Peter Zimmer Rotary screen printing machine
US3556004A (en) * 1967-05-26 1971-01-19 Zimmer Johannes Device on rotary printing machines
US3599565A (en) * 1967-09-26 1971-08-17 Fritz Buser Ag Fa Rotary seen printing machine with improved mounting for the screen
US3608482A (en) * 1969-10-31 1971-09-28 American Screen Process Equip Locking bar for screen-printing frame

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117779A (en) * 1975-09-03 1978-10-03 Stork Brabant B.V. Means to provide uniform lengthwise squeegee angle of attack
US4272872A (en) * 1978-02-14 1981-06-16 Fritz Buser Maschinenfabrik Ag Device for holding a thin-walled metal cylinder
US4914478A (en) * 1985-01-16 1990-04-03 Canon Kabushiki Kaisha Image holding member
US5410963A (en) * 1994-05-03 1995-05-02 Squarmount, Inc. Backing blanket for printing plates
EP0743180A3 (en) * 1995-05-17 1996-11-27 Eredi Di Bernasconi Fausto Unmachined die-cast aluminium end ring for a cylindrical screen
EP1208953A3 (en) * 2000-08-02 2003-07-23 Tecno - Europa S.R.L. Decorating means
WO2009006717A3 (en) * 2007-07-09 2009-03-05 Paulo Roberto Lourenco System for printing of big formats in fabrics and dispositive for printing of big formats in fabrics

Also Published As

Publication number Publication date
CA1009505A (en) 1977-05-03
DE2401575A1 (de) 1974-10-17
DE2401575C2 (de) 1982-11-04
JPS50912A (enrdf_load_stackoverflow) 1975-01-08
GB1432858A (en) 1976-04-22
IT999950B (it) 1976-03-10
CH573308A5 (enrdf_load_stackoverflow) 1976-03-15
NL7404408A (enrdf_load_stackoverflow) 1974-10-11
FR2224298B1 (enrdf_load_stackoverflow) 1977-10-21
FR2224298A1 (enrdf_load_stackoverflow) 1974-10-31
JPS5852836B2 (ja) 1983-11-25
AT331277B (de) 1976-08-10
ATA291274A (de) 1975-11-15
BE813145A (fr) 1974-07-31

Similar Documents

Publication Publication Date Title
US3858507A (en) Cylindrical stencil with plastic end rings
US3803457A (en) Block type electrolytic capacitor
US4197798A (en) Metal plated plastic base intaglio printing cylinders and plates
JPS59103794A (ja) 平版印刷版用複合体材料の製造法
JPS58130294A (ja) 電着銅箔製造用の改良されたドラム装置
US5089109A (en) Electrode protector
US4865699A (en) Process and apparatus for anodizing aluminum
CN218360403U (zh) 一种uv胶涂布针头
JP2686671B2 (ja) アルミニウム電解コンデンサ
CN222922698U (zh) 一种基于料带卷盘机构的内挡板
CN217707620U (zh) 一种滚筒组件
JPH0797700A (ja) 印刷ロールのメッキ用導電治具
US4437942A (en) Methods for producing printing plates, and printing plates produced thereby
CN222985999U (zh) 一种过辊及模切机
CN116837442A (zh) 多孔隙基材双面电镀设备及电镀方法
US3587464A (en) Saddle mounting for flexible thin printing plates
US4975169A (en) Drum for producing electrodeposited metal foil
US6199479B1 (en) Method and apparatus for stencil printing
CN210287555U (zh) 一种用于刹车泵铝卡钳阳极氧化的挂具
CN217735203U (zh) 夹头及设有该夹头的夹件
JPS61227198A (ja) プリンタ印字輪等の円形外周部にメツキする方法及びこの方法に用いるメツキ装置
CN220312202U (zh) 一种防延时焊合接头
JP2946445B2 (ja) 連続電解処理装置
CN215576117U (zh) 废粉仓导电限位结构
CN212736070U (zh) 一种玻璃切割一体机取片机械臂的主轴固定结构