US2143617A - Roller for use in printing - Google Patents

Roller for use in printing Download PDF

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Publication number
US2143617A
US2143617A US41800A US4180035A US2143617A US 2143617 A US2143617 A US 2143617A US 41800 A US41800 A US 41800A US 4180035 A US4180035 A US 4180035A US 2143617 A US2143617 A US 2143617A
Authority
US
United States
Prior art keywords
rollers
slab
fabric
roller
inking
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
US41800A
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English (en)
Inventor
Beaune Serge Virgile
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.)
PROCEDES SERGE BEAUNE SOC D
PROCEDES SERGE BEAUNE Ste
Original Assignee
PROCEDES SERGE BEAUNE SOC D
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 PROCEDES SERGE BEAUNE SOC D filed Critical PROCEDES SERGE BEAUNE SOC D
Priority to US127784A priority Critical patent/US2246872A/en
Application granted granted Critical
Publication of US2143617A publication Critical patent/US2143617A/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
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26—Details
    • B41F1/40—Inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/005—Coverings for wipers

Definitions

  • the present invention relates to elements for usein printing operations and more particularly pertains to rollers employed in printing processes.
  • rollers are generally imperfectly centered. If one of these rollers is examined, the. axis of which is of necessity free, it will be noted that the rollerrebounds and jumps and these movements are more noticeable as the speed of the machine increases.
  • rollers having a 'core coated with gelatine by moulding and which are currently employed do not stand up to high speeds every well. Their critical point as regards the deformation produced by these speeds uis reached rapidly, particularly when the surroundingy temperature exceeds normal' temperature.
  • rollers are unsuitable for inking -cuts produced by acid or an engraving tool andin general'for all intaglio processes, as the rollers cannot withstand any tangential pressure-without deformation.
  • the object of the present invention is to remove these various disadvantages and it consists in replacing the so-called moulded" rollers, that is to say, rollers provided with a coating produced by moulding upon the core and employed in the various printing processes, by rollers provided with removable coatings which constitute true sheaths or sleeves prepared without the use of the core to be covered.
  • removable sleeves are constituted by a layer of strictly constant thickness made of asuitable plastic material, which may if desired ⁇ be deposited upon a support made of fabricar of any other material upon which the layer can Y adhere firmly.
  • plastic .removable sleevesmade of a suitable material or of composite construction may thus be prepared and stocked or ⁇ delivered in the form of bands, cut as required, and which in order to obtain a rollerare firmly rolled and xed upon theperiphery of a cylinder, the developed surface of which corresponds to the length of the band.
  • the sleeve separately prepared will have a con-2 stant thickness, which may be suitably reduced to about two millimeters.
  • rollers' When provided with such a thin removablesleeve, these rollers'can be utilized for all methods of printing.
  • the sleeve may even be reduced to a constant thickness of 0.5 millimeter applied upon a support previously rendered impervious upon its outer surface, this support being made .of fabric or any other flexible material, enabling the thin active lay'er to adhere.
  • Figure 3 diagrammatically illustrates a machine in longitudinal section for manufacturing the sheaths.
  • these inking rollers comprise preferably a support made of a metal cylinder P, having a chosen diameter and covered with a layer 5 of ebonite Q of 5 millimeters thickness.
  • the inking rollers thus formed have a strictly constant diameter, which is a necessary condition for the correct perfomance of the inkin'g function required of these rollers.
  • the coating forming the body of the sheath can be easily cut out with great accuracy when it is only required to ink chosen portions of the roller, and this cutting operation can easily be carried out on account of the small thickness of the sheath or plate.
  • the wiper rollers ( Figure 2) comprise a support made of a metal cylinder Pl covered with a layer of ebonite Q1 having a thickness of 5 millimeters and then a rst layer of rubber J1 of the. same thickness.
  • the layer of coating material R1 is, as in the case of the inking rollers, attached by cementing in the cold state, but with a covered joint I in order to protect the rubber from any possible contact with the solvent.
  • the numerical data given above are only mentioned by way of indications and may vary according to the circumstances of manufacture or to the particular use to which the rollers are to be put.
  • the bodies of sheaths according to the invention of a composition which is particularly suitable to serve for inking' and wiping sheaths or sleeves.
  • the gelatine placed in a first perforated container is immersed for three minutes in a tank containing the distilled water or in the absence of distilled water soft water maintained at a temperature of about 15 C.
  • the gelatine is then removed and drained for one hour. It is placed in a water bath in a container at a temperature of C., which must .never be exceeded.
  • the Meudonwwhite has ⁇ been finally crushed with a part of the glycerine in the proportion of .n 25 parts of white to 10 parts of glycerine.
  • the rest of the glycerine is placed in a third container with the wax which has previously been grated.
  • the gelatine forms a homogeneous paste care is taken to observe that the material contained in the two other containers has reached the temperature of 55 C., then the contents of the second container are poured into the gelatine while agitating continually and finally the contents of the third container are added thereto.
  • the material is cut for example in small cubes, 5 placed in a vessel in a water bath upon a very slow nre. Its pasty state must be maintained at a temperature of 50 C.
  • the slab in cross section is U-shaped and or a track O. l5
  • a tempered steel blade C is fixed in a blade holder D which is adapted to be pivoted about an axis D and soarranged as to be locked in any angular position by means of any well known locking member (not shownin the drawing).
  • the blade C is preferably of a width corresponding to that of the slab A-B and is ground on both sides so as to provide a knife-like edge.
  • a rod E the thickness of which may be ad- 2t vantageously two millimeters if it is desired to manufacture coating sleeves or sheaths or rollers or other inking members and the diameter of the rods E may be approximately .5 millimeter in making wiping sleeves and sheaths and rollers.
  • the material K which constitutes the body of the sheath is deposited upon the slab and held laterally by the side plates G which are adjustable and mounted so as to project above the surface of the slab A-B.
  • a container L which is adapted to 4receive any Vunused material which may be present at the end of the manufacturing operation.
  • the supporting fabric H may be wound upon a drum I and is held under tension by means of a. 41 counterweight M. The free end of the fabric H is fed over ⁇ a guide roller to the front end A of the slab and-held there, for example, by means of a clip N.
  • the blade C by an angular displacement about the axis D' may be adjusted and 4 fixed in the required position in order to compress fabric H upon the rods E. 'I'he distance from the edge of the blade C to the slab represents the thickness of the body of the sheath desired to be obtained. 5
  • a sumcient quantity of material mixed as hereinabove described and having a pastyconstituency and raised to asuitable softening temperature is Ypositioned over the slab t A-B and this material is then engaged by its mass between the slab and the fabric.
  • the slab nis then moved forward at a speed which is preferably uniform such al. for example, at the rate of millimeters per ⁇ second.
  • the material is compressed by the blade C between the slab A-B and the fabric H to lthus be spread in a imiform layer over the width of the slab.
  • 'l'.'he front end of the slab is adapted to engage-an abutment a to stop'the forward movement thereof and the unused material will thus be moved into thecontainer L.
  • the fabric which has thus received its rst layer is allowed to cool.
  • Another layer or an additional coating may be applied by repeating' the above described operation. 'me backward movement of the slab is, limited by the stop b.
  • the layer of material spread in such a manner adheres to the fabric and becomes detached from the polished slab.
  • After cooling the coated fabric may be cut at B and detached at N.
  • the surface of the material is found to be bright, polished and free from all blowholes including traces of air bubbles.
  • the fabric is provided with a layer which renders it impervious prior to the coating operation asA above described.
  • the gelatin coating is applied upon the surface of the fabric which has not been rendered impervious.
  • a roller adapted for use in printing operations comprising, a rigid core, an outer removable coating of plastic'material covering said core 2.
  • a roller adapted for use in printing operations comprising, a cylindrically 4shaped rigid core, a removable sheath of constant thickness arranged around said core, said sheath consisting of a supporting fabric having a non-porous gelatinous surface layer of a thickness substantially less than 2.5 millimeters, said layer applied to the fabric before the same is placed on the roller.
  • a roller adapted for use in printing operations comprising. a rigid cylindrically shapedy core, a removable sheath arranged around said core, said sheath consisting of a supporting fabric having a gelatinous surface layer thereon of constant thickness which is applied to said fabric before the same is placed on the roller, the surface of said gelatinous layer being smooth and free from holes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Paints Or Removers (AREA)
  • Printing Plates And Materials Therefor (AREA)
US41800A 1934-10-05 1935-09-23 Roller for use in printing Expired - Lifetime US2143617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US127784A US2246872A (en) 1935-09-23 1937-02-25 Method and apparatus for manufacturing thin gelatinous coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR671843X 1934-10-05

Publications (1)

Publication Number Publication Date
US2143617A true US2143617A (en) 1939-01-10

Family

ID=9017189

Family Applications (1)

Application Number Title Priority Date Filing Date
US41800A Expired - Lifetime US2143617A (en) 1934-10-05 1935-09-23 Roller for use in printing

Country Status (5)

Country Link
US (1) US2143617A (enrdf_load_stackoverflow)
BE (1) BE411414A (enrdf_load_stackoverflow)
DE (1) DE671843C (enrdf_load_stackoverflow)
FR (1) FR780352A (enrdf_load_stackoverflow)
GB (1) GB463869A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103351B (de) * 1958-11-13 1961-03-30 Goebel Gmbh Maschf Verfahren zum Herstellen von profilierten Einfaerbewalzen fuer Stahlstich- oder Tiefdruckverfahren
US3196513A (en) * 1963-02-11 1965-07-27 Parma Domenico Machine for making precast concrete products

Also Published As

Publication number Publication date
BE411414A (enrdf_load_stackoverflow)
GB463869A (en) 1937-04-05
DE671843C (de) 1939-02-16
FR780352A (fr) 1935-04-25

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