US3805701A - Printing plate saddle - Google Patents

Printing plate saddle Download PDF

Info

Publication number
US3805701A
US3805701A US00023565A US2356570A US3805701A US 3805701 A US3805701 A US 3805701A US 00023565 A US00023565 A US 00023565A US 2356570 A US2356570 A US 2356570A US 3805701 A US3805701 A US 3805701A
Authority
US
United States
Prior art keywords
saddle
end members
printing plate
curved member
printing
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
US00023565A
Other languages
English (en)
Inventor
J Sonia
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to US00023565A priority Critical patent/US3805701A/en
Priority to CA108774A priority patent/CA924179A/en
Priority to DE19712114799 priority patent/DE2114799C3/de
Priority to JP46018005A priority patent/JPS506807B1/ja
Priority to GB2548971*A priority patent/GB1344724A/en
Application granted granted Critical
Publication of US3805701A publication Critical patent/US3805701A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members

Definitions

  • This invention relates to a saddle for printing plates. More particularly, this invention relates to a saddle for relatively thin printing plates, especially plastic printing plates, which can be employed with printing cylinders adapted to use conventional relatively thick lead stereo printing plates.
  • the saddle of this invention although simple in construction, permits rapid mounting of one or more thin plastic printing plates on the saddle.
  • the saddle is easily mounted upon conventional press cylinders using existing tension lock-up systems which lock the printing plate to the press cylinder.
  • a saddle for plastic printing plates employing a semicylindrical curved member, the concave surface of which is adapted for engagement against the convex surface of a press cylinder, while the convex surface is adapted to have printing plates mounted thereon and two end members slideably mounted at the ends of the curved member.
  • the end members are provided with engaging means to engage a plurality of apertures in the printing plate and securely fasten the printing plates over the convex surface of the curved member.
  • the end members also include slots for engaging the tension hooks of a conventional press cylinder in order to mount the saddle and printing plate combination on the press.
  • the FIGURE is a prospective view of a preferred saddle of the present invention.
  • a saddle is shown employing a curved member 4 which is the main saddle assembly and two end members 6,8.
  • the end members 6,8 have lugs 10 for engaging corresponding apertures in a plastic printing plate 12.
  • the number of lugs is not critical and can vary widely. Normally from 2 to about lugs are sufficient depending upon the size of the saddle and the physical properties of the printing plates.
  • Slots 14 are provided in the end members 6,8 for engaging tension hooks of a conventional press cylinder (not shown).
  • the engaging surface of slots 14 is preferably beveled to provide compensation for misalignment of the engaging slots 14 and the tension hooks of a press cylin- 'der.
  • Curved member 4 is provided with L shaped projecting jaws l6 and at both ends, parallel to the axis of rotation and which are adapted to engage corresponding jaws 16 provided on end members 6 and 8.
  • Member 4 is preferably undercut on its inner or concave surface to receive end members 6 and 8, leaving an uninterrupted surface on the convex surface to avoid distortions in the printing surface.
  • a loose fit is provided in the engaging jaws by making the radial extension of the jaws narrower than the length of the circumferential extension of the jaws to facilitate assembly and disassembly. This tolerance is preferably from about 1/32 to about 1/2 inch, which approximates the amount of travel in the locking movement of the tension hoods of a conventional press cylinder. This causes member 4, end members6 and 8 and printing plate 12 to beheld together rigidly on the press cylinder, after locking, primarily by tension forces acting on printing plate 12.
  • jaws 16 are shown as separate elements fastened onto member 4 as a convenience in manufacture. It will be appreciated that jaws l6 and mumber 4 can be of unitary construction, if it is so desired.
  • any of the conventional metals can be used for manufacture of the saddle.
  • a wide variety of relatively light weight plastics can be used for member 4. It is preferable however that end members 6 and 8 and jaws 16 be of metal for strength and wear resistance in use.
  • the ability to use light weight plastic materials for a large porportion of the saddle is an important safety feature of this invention.
  • the significantly lighter weight of the saddle of this invention results in much smaller force gradients in case of a failure during the printing cycle at high rotational speeds.
  • the plastic printing plate is sometimes able to contain broken pieces of the saddle which would otherwise fly off the cylinder at very high velocities.
  • undersurface of member 4 can be hollowed out as for example in a honeycomb or grid manner to achieve further weight reductron.
  • a re-usable saddle for mounting thin printing plates on press cylinders which comprises a generally semi-cylindrical curved member having a concave surface adapted to be mounted on the convex surface of a press cylinder; a smooth uninterrupted convex surface adapted to have one or more printing plates mounted thereon, two slideable end members mounted on the concave surface at the ends of said curved member which are generally parallel to the cylindrical axis,
  • a plurality of lugs on said end members adapted to engage apertures in a printing plate and slots in said end members adapted to engage the tension hooks of a 4 cumferential tolerance of from about 1/32 to about l/2 inch is provided between the engaging portions of each of said end members and said semi-cylindrical curved member.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US00023565A 1970-03-30 1970-03-30 Printing plate saddle Expired - Lifetime US3805701A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00023565A US3805701A (en) 1970-03-30 1970-03-30 Printing plate saddle
CA108774A CA924179A (en) 1970-03-30 1971-03-26 Printing plate saddle
DE19712114799 DE2114799C3 (de) 1970-03-30 1971-03-26 Sattelplatte
JP46018005A JPS506807B1 (enrdf_load_stackoverflow) 1970-03-30 1971-03-29
GB2548971*A GB1344724A (en) 1970-03-30 1971-04-19 Saddles for printing plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00023565A US3805701A (en) 1970-03-30 1970-03-30 Printing plate saddle

Publications (1)

Publication Number Publication Date
US3805701A true US3805701A (en) 1974-04-23

Family

ID=21815887

Family Applications (1)

Application Number Title Priority Date Filing Date
US00023565A Expired - Lifetime US3805701A (en) 1970-03-30 1970-03-30 Printing plate saddle

Country Status (4)

Country Link
US (1) US3805701A (enrdf_load_stackoverflow)
JP (1) JPS506807B1 (enrdf_load_stackoverflow)
CA (1) CA924179A (enrdf_load_stackoverflow)
GB (1) GB1344724A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62110093A (ja) * 1985-11-08 1987-05-21 株式会社　潤工社 管継手
JPS6325895U (enrdf_load_stackoverflow) * 1986-08-01 1988-02-20
EP0370026B1 (en) * 1987-06-10 1994-08-17 Conoco Specialty Products Inc. Liquid separator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966848A (en) * 1958-05-07 1961-01-03 Time Inc Expandable base plate
US3107610A (en) * 1960-02-12 1963-10-22 Du Pont Device for printing plates
GB1115936A (en) * 1965-11-08 1968-06-06 Maschf Augsburg Nuernberg Ag Improvements in or relating to the mounting of printing plates on the plate cylinders of rotary printing machines
US3533355A (en) * 1967-02-13 1970-10-13 Nat Electrotype Co Inc Printing plate saddle
US3536003A (en) * 1967-07-10 1970-10-27 Sta Hi Corp Printing press cylinder with mechanical and vacuum holding means for flexible printing plates

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966848A (en) * 1958-05-07 1961-01-03 Time Inc Expandable base plate
US3107610A (en) * 1960-02-12 1963-10-22 Du Pont Device for printing plates
GB1115936A (en) * 1965-11-08 1968-06-06 Maschf Augsburg Nuernberg Ag Improvements in or relating to the mounting of printing plates on the plate cylinders of rotary printing machines
US3533355A (en) * 1967-02-13 1970-10-13 Nat Electrotype Co Inc Printing plate saddle
US3536003A (en) * 1967-07-10 1970-10-27 Sta Hi Corp Printing press cylinder with mechanical and vacuum holding means for flexible printing plates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly

Also Published As

Publication number Publication date
DE2114799B2 (de) 1975-06-05
CA924179A (en) 1973-04-10
JPS506807B1 (enrdf_load_stackoverflow) 1975-03-18
DE2114799A1 (de) 1971-10-21
GB1344724A (en) 1974-01-23

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