|Publication number||US5740738 A|
|Application number||US 08/702,395|
|Publication date||Apr 21, 1998|
|Filing date||Aug 14, 1996|
|Priority date||Aug 14, 1996|
|Publication number||08702395, 702395, US 5740738 A, US 5740738A, US-A-5740738, US5740738 A, US5740738A|
|Inventors||Thaddeus A. Niemiro|
|Original Assignee||Goss Graphic Systems, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (10), Referenced by (18), Classifications (6), Legal Events (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to blanket cylinders for a printing press.
As the requirement for faster speeds of a printing press increases, the conventional blanket cylinder construction with a lock-up gutter becomes increasingly inadequate. Thus, there is a need for gapless blankets to increase the press speed while maintaining print quality, thus increasing productivity, save paper by decreasing the cut-off gap, and decrease press down time by decreasing blanket change time.
A principal feature of the present invention is the provision of an improved blanket cylinder for a printing press.
The blanket cylinder of the present invention comprises, an inner mandrel having an outer surface, a split shell having a longitudinal slit defining opposed ends of the shell, and being positioned on the outer surface of the mandrel with a minimal gap between the opposed ends of the shell, means for retaining the shell on the mandrel, and a compressible blanket being formed on an outer surface of the shell.
A feature of the present invention is that the blanket has dimensions to close the opposed ends of the shell.
Another feature of the invention is that the shell and blanket results in the formation of a gapless blanket cylinder.
Yet another feature of the invention is that the blanket of the present invention increases the press speed while maintaining print quality.
Thus, a feature of the present invention is that the blanket of the invention increases productivity of the press.
Still another feature of the invention is that the blanket of the invention saves paper by decreasing the cut-off gap.
Another feature of the invention is that the blanket of the invention decreases press down time by decreasing blanket change time.
Further features will become more fully apparent in the following description of the invention, and from the appended claims.
In the drawings:
FIG. 1 is a fragmentary sectional view of a blanket cylinder of the present invention; and
FIG. 2 is a fragmentary perspective view, partly broken away, of the blanket cylinder of FIG. 1.
Referring now to FIGS. 1 and 2, there is shown a blanket cylinder generally designated 10 for a printing press. The blanket cylinder 10 has an inner precision mandrel 12 which may be constructed of any suitable material, such as steel. The mandrel 12 has an outer surface 14.
The cylinder 10 has a split shell or sleeve 16 having a longitudinal slit 18 defining opposed ends 20 and 22 of the shell 16. The shell 16 is positioned on the outer surface 14 of the mandrel 12 with a minimal gap 24 between the opposed ends 20 and 22 of the shell 16.
In one embodiment, the blanket cylinder 10 has a plurality of apertures or openings 26 in the outer surface 14 of the mandrel 12. The apertures 26 communicate with a source of vacuum 28 through a conduit 30 which extends through a journal 32 of the mandrel 12. Thus, the vacuum source 28 is applied through the openings 26 to the shell 16 in order to hold the shell 16 in place. In this embodiment, the shell 16 may be constructed from any suitable composite material, such as fiberglass, or it may be constructed from any suitable metal.
In another embodiment, the mandrel 12 has an outer portion near the surface 14 which is magnetized, and the shell 16 is made from a magnetically permeable material, such as steel. Thus, the magnetic mandrel 12 holds the magnetically permeable material of the shell 16 in place.
The blanket 10 has an outer compressible blanket 34, such as an elastomeric material, which is formed on an outer surface 36 of the shell 16. The inner diameter of the blanket 34 is slightly less than the outer diameter of the outer surface 36 of the shell 16. A slight air pressure is used to slide the blanket 34 over the shell 16 through an open operating side frame of the press. The blanket 34 thus has dimensions to close the opposed ends 20 and 22 of the shell 16 to a minimal gap 24, such as 0.002-0.003inches. Thus, a gapless cylinder is formed by the shell 16 and blanket 34.
The mandrel 12 may have an outer retractable pin 38 which is received in an opening 40 of the shell 16 in order to locate the shell 16 on the mandrel 12.
In a preferred form, the shell 16 has a thickness of approximately 1-2 mm. The inside diameter of the shell 16 is about 0.002 inches smaller than the final printing cylinder on which it is to be mounted. The thickness of the blanket 34 is approximately 0.050-0.100 inches. The blanket 34 closes the gap 24 of the shell 16 to a minimal amount, such as approximately 0.002 to 0.003 inches.
Thus, a gapless blanket cylinder 10 is formed by the shell 16 and blanket 34. The blanket cylinder 10 thus formed increases the press speed while maintaining print quality, thus increasing productivity of the press. The blanket cylinder 10 also saves paper of the web in the press by decreasing the cut-off gap, and decreases press down time by decreasing blanket change time.
The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, as modifications will be obvious to those skilled in the art.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3745626 *||Dec 27, 1971||Jul 17, 1973||Magna Graphics Corp||Coating roll|
|US4676161 *||Aug 6, 1985||Jun 30, 1987||R. R. Donnelley & Sons Company||Magnetic cylinders with image plate or blanket for offset printing|
|US4817527 *||Mar 6, 1986||Apr 4, 1989||R.R. Donnelley & Sons Company||Printing blanket with carrier plate and method of assembly|
|US4913048 *||Jan 3, 1989||Apr 3, 1990||Tittgemeyer Engineering||Method and apparatus for printing with a lithographic sleeve|
|US5038680 *||Dec 18, 1989||Aug 13, 1991||Rockwell International Corporation||Printing press blanket cylinder assembly and method of making same|
|US5209163 *||Oct 23, 1989||May 11, 1993||R. R. Donnelley & Sons Company||Printing cylinder with retractable plate register pin and method of assembly|
|US5351615 *||May 25, 1993||Oct 4, 1994||Man Roland Druckmaschinen Ag||Offset blanket for a grooveless blanket cylinder composed of a carrier plate and a rubber layer placed thereon|
|US5410965 *||Dec 3, 1992||May 2, 1995||R. R. Donnelley & Sons Company||Blanket for a magnetic cylinder|
|DE2335682A1 *||Jul 13, 1973||Jan 24, 1974||Precision Printing Equipment W||Druckmaschinenzylinder|
|JPS568264A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6276271 *||May 3, 2000||Aug 21, 2001||Day International, Inc.||Bridge mandrel for flexographic printing systems|
|US6283026 *||Nov 2, 1999||Sep 4, 2001||Polybribron Technologies S.A.||Device for automatically blocking air passages in cylinder, specifically for support cylinders and compensation mantles|
|US6520896 *||Jun 22, 2000||Feb 18, 2003||Voith Sulzer Papiertechnik Patent Gmbh||Elastic roll and a process for producing such a roll|
|US6799511||Dec 3, 2002||Oct 5, 2004||Day International, Inc.||Gapless compressible cylinder assembly|
|US7011021||Sep 10, 2001||Mar 14, 2006||Day International, Inc.||Printing blanket sleeve with replaceable printing surface|
|US7171900||Jun 9, 2004||Feb 6, 2007||Goss International Corporation||Variable format offset printing machine|
|US7373880||Jan 23, 2007||May 20, 2008||Goss International Corporation||Variable format offset printing press|
|US8392570||Apr 12, 2010||Mar 5, 2013||Apple Inc.||Method and arrangement for suppressing duplicate network resources|
|US8825868||Jan 16, 2013||Sep 2, 2014||Apple Inc.||Method and arrangement for suppressing duplicate network resources|
|US9166926||Aug 19, 2014||Oct 20, 2015||Apple Inc.||Method and arrangement for suppressing duplicate network resources|
|US20040261643 *||Jun 9, 2004||Dec 30, 2004||Goss International Corporation||Variable format offset printing machine|
|US20070119318 *||Jan 23, 2007||May 31, 2007||Goss International Corporation||Variable format offset printing press|
|US20070203433 *||Jan 25, 2007||Aug 30, 2007||Murphy Martin P||Relaxation inducing apparatus|
|US20100223387 *||Apr 12, 2010||Sep 2, 2010||Kevin Arnold||Method and Arrangement for Suppressing Duplicate Network Resources|
|US20150217560 *||May 18, 2012||Aug 6, 2015||Jun Sakamoto||Blanket set, transfer roll, and printing apparatus|
|DE10123325A1 *||May 12, 2001||Nov 21, 2002||Koenig & Bauer Ag||Printing press transfer cylinder has recess in carrier plate acting with single register block|
|DE10123325B4 *||May 12, 2001||Dec 15, 2005||Koenig & Bauer Ag||Übertragungszylinder einer Druckmaschine|
|WO2011101500A1 *||Nov 8, 2010||Aug 25, 2011||Comexi Group Industries, S.A.||Positioning system for positioning a bushing on a mandrel, bushing and mandrel suitable for use on a roller of a printing machine|
|U.S. Classification||101/376, 101/389.1, 492/8|
|Aug 14, 1996||AS||Assignment|
Owner name: ROCKWELL INTERNATIONAL CORP., CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NIEMIRO, THADDEUS A.;REEL/FRAME:008173/0411
Effective date: 19960814
|Oct 19, 2001||FPAY||Fee payment|
Year of fee payment: 4
|Nov 6, 2001||CC||Certificate of correction|
|Mar 28, 2003||AS||Assignment|
|Apr 1, 2003||AS||Assignment|
|Sep 2, 2004||AS||Assignment|
Owner name: U.S. BANK, N.A.,MINNESOTA
Free format text: SECURITY AGREEMENT;ASSIGNOR:GOSS INTERNATIONAL CORPORATION;REEL/FRAME:015748/0855
Effective date: 20040806
|Oct 21, 2005||FPAY||Fee payment|
Year of fee payment: 8
|Jul 15, 2009||AS||Assignment|
|Oct 21, 2009||FPAY||Fee payment|
Year of fee payment: 12
|Jun 21, 2010||AS||Assignment|
Owner name: GOSS INTERNATIONAL CORPORATION,ILLINOIS
Free format text: RELEASE OF SECURITY INTEREST (GRANTED IN REEL 015748; FRAME: 0855);ASSIGNOR:U.S. BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:024563/0176
Effective date: 20100611
Owner name: GOSS INTERNATIONAL CORPORATION,ILLINOIS
Free format text: RELEASE OF SECURITY INTEREST (GRANTED IN REEL 013913; FRAME: 0573);ASSIGNOR:U.S. BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:024563/0188
Effective date: 20100611
|Sep 20, 2010||AS||Assignment|
Owner name: GOSS INTERNATIONAL CORPORATION, ILLINOIS
Free format text: RELEASE OF SECURITY INTEREST (GRANTED IN REEL 022960; FRAME 0132);ASSIGNOR:U.S. BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:025008/0324
Effective date: 20100914