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Publication numberUS3216349 A
Publication typeGrant
Publication dateNov 9, 1965
Filing dateFeb 21, 1963
Priority dateFeb 21, 1963
Publication numberUS 3216349 A, US 3216349A, US-A-3216349, US3216349 A, US3216349A
InventorsKraft Rupert
Original AssigneeJohannes Zimmer Maschf
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for treating sheet material
US 3216349 A
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Description  (OCR text may contain errors)

Nov. 9 1965 R. KRAFT 3,216,349

APPARATUS FOR TREATING SHEET MATERIAL Filed Feb. 21, 1963 la'llmllln /n venfor RUPERT KRAFT A 170/0 6 yj United States Patent 3,216,349 APPARATUS FOR TREATING SHEET MATERIAL Rupert Kraft, Klagenfurt, Carinthia, Austria, assignor to Maschinenfabrik Johannes Zimmer, Klagenfurt, Carinthia, Austria Filed Feb. 21, 1963, Ser. No. 260,140 Claims. (Cl. 101123) This invention relates to an apparatus for treating sheet material, particularly for printing textile fabrics and the like and comprises a roller which is urged by magnetic forces against the material to be treated and which is moved relative to same in rolling contact therewith.

In a known apparatus of this kind, the roller for treating a web of material is forced against the latter by a magnet which is disposed on the opposite side of the web.

When it is desired to treat a material of greater thickness, e.g., to print a carpet web or the like, the distance between the surface of the magnet and the magnetically attracted doctor roller is so large that the magnetic flux densities normally available will not result in a sufiiciently high contact pressure.

To eliminate this disadvantage it is proposed according to the invention to provide the roller with at least two axially spaced portions which constitute magnetic poles and to provide magnetic means having magnetic poles each of which is closely spaced over a like magnetic pole of said roll.

The magnets having magnetic poles closely spaced over like magnetic poles of the doctor roller give rise to a repelling force urging the cylinder against the material to be treated.

In order to ensure that the magnetic poles of the doctor roller will be constantly maintained exactly under the magnetic poles of the magnets, guide means may be provided at the ends of the roller or, where the roller is entirely freely arranged, the magnetic poles of the repelling magnets disposed over the roller may be shaped to surround a portion of the periphery of the roller. Owing to this design of the magnetic poles of the repelling magnets, the doctor roller is surrounded by repelling forces so that its longitudinal axis will always lie exactly under the repelling magnets.

A doctor roller having magnetic magnetic poles may be provided by a provision of magnetic rollers known I per se.

It has been found particularly suitable, however, to use a so-called magnetic rubber composition. In this case the particles of permanently magnetizable material embedded in rubber or another elastomer are given a permanent magnetization and annular magnetic poles are obtained on the surface of the roller.

The sheet material to be treated may be moved below the doctor roller or the latter may be moved over the sheet material held in position. In this case the repelling magnets are moved in the desired direction of movement of the doctor roller and entrain the same while applying repelling forces thereon. Hence, the doctor roller is forced against the material to be treated and rolls along the same. The use of electromagnets enables an adjustment of the contact pressure of the roller.

A plurality of embodiments of the invention are shown by way of example on the drawing.

FIGS. 1 and 2, respectively, are longitudinal sectional views showing two embodiments of the invention.

FIG. 3 illustrates a modification of FIG. 2 in a fragmentary sectional perspective view taken on a line corresponding to line AA of FIG. 2.

FIG. 4 is a fragmentary transverse sectional view illustrating another modification.

"ice

In all figures of the drawing, like reference characters indicate like parts.

The sheet material 1 lying on a base 21 is treated by a roller, which is indicated at 2 in FIG. 1 and may consist of a doctor roller, which causes the material 1 to be printed under control of a stencil 11.

In the embodiment shown in FIG. 1 the roller 2 consists of a bar magnet having opposite end portions, which form a magnetic north pole N and a magnetic south pole S, respectively. A north pole N of a repelling magnet 3 is closely spaced over the north pole N of the roller 2 and a south pole S of a repelling magnet 4 is closely spaced over the south pole S of the roller 2. The closely spaced like poles exert a repelling force on the roller 2 so that the latter is forced against the stencil 11. To prevent the roller 2 from yielding laterally under the repelling force, the roller 2 is formed at opposite ends with axial bearings 22 and two angular guide members 6 are provided on opposite ends of the roller 2.- Each of the guide members 6 has a horizontal portion extending into one of the bearings 22 and a vertical portion. Each of the repelling magnets 3 and 4 carries a retaining member ,5 formed with a hole 23, through which the vertical portion of one of the guide members 6 slidably extends. This arrangement enables a bodily movement of the roller 2 relative to the magnets 3, 4 only in the direction of the repelling force. The magnets 3 and 4 may be secured to a frame or housing 10. For a treatment of the web of material 1, the latter may be moved under the roller 2 or the roller 2 may be moved together with the magnets 3 and 4 over the web of material 1.

FIG. 2 shows an embodiment in which the roller 2" rolls on the material 1 without being supported in bearings. The roller 2 has axially spaced magnetic north poles 24 and magnetic south poles 25 in alternation. The magnetic members, which surround the core of the roller 2 and are axially spaced apart by non-magnetic portions. The peripheral surface of the roller 2 is formed by a rubber covering 26.

v The repelling magnets 3 and 4 are provided in a number corresponding to the magnetic north and south poles, respectively, of the roller 2 and are carried by a frame 10', which is guided at both ends in a direction transverse to the axis of the roller 2' by an angular guide surface 31 of a rigid guide structure 32 secured to the base 21. This guide structure 32 is shown only at one end of the frame 10' but may obviously be duplicated at the other end.

The repelling magnets 3 and 4 have pole pieces 7 providing magnetic poles closely spaced over like magnetic poles of the roller 2'. The pole pieces 7 form extensions which surround a portion of the peripheral surface of the roller 2' so that the roller 2 is forced against the base 21 without being able to yield laterally. The roller 2' will follow the movement of the magnets 3 and 4.

FIG. 3 shows a modification of the embodiment of FIG. 2. The roller 2" has a steel core 33 and a covering of magnetic rubber 27, which is magnetized in axially spaced zones to provide north poles 28 and south poles 29 in alternation. In other respects, the arrangement is similar to that of FIG. 2.

FIG. 4 shows a further modification of the embodiments illustratedin FIGS. 2 and 3. According to this modification, the repelling magnets consist of electromagnets comprising eaoh a magnet core 8 which is surrounded by the ma-gnetizing coil 9 and is formed or provided at one end with a pole piece 7' partly surrounding the roller 34. A rheostat 30 in series with the magnetizing coil 9 enables an adjustment of the repelling force exerted by the electromagnet 8, 9 on the roller 34. The roller 34 may be formed like any of the rollers 2, 2' or 2" of FIGS. 1 to 3.

The thickness of the rollers 2, 2', 2" or 34 and the form of the magnetic pole piece 7 may be determined in view of the material to be treated and the desired treatment thereof. Various modifications of the embodiments shown are within the scope of the invention. For instance, the retaining means formed in the embodiment of FIG. 1 by the guide means 5, 6 and in the embodiments of FIGS. 2 to 4 by the pole pieces 7 or 7' could be interchanged. Guide structure such as shown at 31, 32 in FIG. 2 could be provided in the embodiment of FIG. 1. The roller in the embodiment of FIG. 1 could be replaced by the roller 2' or 2" of FIGS. 2 and 3. The magnets 3 and 4 in FIG. 1 could consist of electromagnets such as shown at 8, 9 in FIG. 4. Means other than the rheostat 30 in FIG. 4 may be provided to vary the energization of the electro-magnets 8, 9. The provision of magnetic north and south poles in alternation is desirable in many cases but may be replaced by any other suitable arrangement of magnetic poles spaced in the axial direction of the roller provided that magnetic poles of the repelling magnet means are closely spaced over like magnetic poles of the roller.

What is claimed is:

1. Apparatus for treating sheet material, comprising a roller adapted to have rolling contact with the sheet material, means for mounting the roller for free vertical movement, means urging the roller downwardly to have pressure contact with the material, said last-named means comprising repelling magnets, said roller comprising an elongated core and a plurality of magnetic members surrounding said core, said magnetic members being axially spaced apart by non-magnetic members, said magnetic members providing spaced poles on the roller, said spaced poles on said roller being opposed by closely positioned poles of like polarity in repelling magnets thereabove said roller being held in spaced relation and out of substantial friction contact with said magnets by magnetic repulsion, and means for restricting the horizontal lateral and longitudinal movement of said roller with respect to the mag nets so as to keep the respective like opposed poles in substantial vertical alignment.

2. The invention as recited in claim 1, wherein said repelling magnets are laterally spaced, vertically extending magnets corresponding in number to the number of the magnetic members of the roller and respectively vertically aligned therewith.

3. The invention as defined in claim 2, wherein the lower end of said vertically extending magnets has horizontally aligned curved recesses receiving said roller.

4. Apparatus for treating sheet material which comprises a roller mounted to move relative to said material in rolling contact therewith and having at least two axially spaced pole portions constituting magnetic pole-s, said apparatus further comprising repelling magnetic means having repelling pole portions forming magnetic .poles, each of which is closely spaced over a magnetic pole of like polarity of said roller, and said roller having free vertical movement with respect to the magnetic poles of said magnetic means and held by said repelling force substantially out of friction contact therewith, said roller having a peripheral surface formed by magnetic rubber, which has axially spaced annular permanent magnetic pofitions forming said magnetic pole portions of said ro er.

5. Apparatus for treating sheet material which comprises a roller mounted to move relative to said material in rolling contact therewith and having at least two axially spaced pole portion-s constituting magnetic poles, said apparatus further comprising repelling magnetic means having repelling .pole portions forming magnetic poles, each of which is closely spaced over a magnetic pole of like polarity of said roller, and said roller having free vertical movement with respect to the magnetic poles of said magnetic means and held by said repelling force substantially out of friction contact therewith, a frame structure carrying said repelling magnetic means, a support having a top surface disposed under said roller and adapted to receive said material to be treated, and a guide structure fixed to said support and in guiding engagement with said frame structure to guide the same relative to said support in a horizontal direction normal to the axis of said roller.

References Cited by the Examiner UNITED STATES PATENTS 408,465 8/89 Dewey 308-10 1,470,962 10/23 Dibble et al 101-123 X 2,959,832 11/60 Baermann 317-158 X 2,965,020 12/60 Zimmer 101-123 3,089,175 5/63 Hinder 15-250.36

FOREIGN PATENTS 878,094 9/61 Great Britain.

OTHER REFERENCES Gardner: What You Can Do with Flexible Magnets, Product Engineering, Jan. 9, 1961, pp. -68, 317-158 Pub.

ROBERT E. PULFREY, Primary Examiner.

EUGENE R. CAPOZIO, Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,216,349 November 9, 1965 Rupert Kraft pears in the above numbered pat- It is hereby certified that error ap Patent should read as ent requiring correction and that the said Letters corrected below.

In the heading to the printed specification, after line 6, insert the following:

Claims priority, application Austria, Feb. 26, 1962,

Signed and sealed this 3rd day of January 1967.

(SEAL) Atteet:

ERNEST W. SWIDER Attesting Officer EDWARD J. BRENNER Commissioner of Patents

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US408465 *Jun 6, 1889Aug 6, 1889 Mark w
US1470962 *Jul 21, 1921Oct 16, 1923E D HoweStenciling machine
US2959832 *Oct 31, 1957Nov 15, 1960Baermann MaxFlexible or resilient permanent magnets
US2965020 *Jun 24, 1955Dec 20, 1960Zimmer S Successors CompanyPrinting textiles and like materials
US3089175 *Sep 1, 1960May 14, 1963Hamilton Clamp & Stampings LtdWindshield wipers
GB878094A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3493274 *Dec 18, 1967Feb 3, 1970Little Inc AMagnetic support systems
US3493275 *Dec 18, 1967Feb 3, 1970Little Inc AVertical suspension system
US3566784 *May 23, 1968Mar 2, 1971Zimmer JohannesSqueegee device
US3592132 *Nov 27, 1968Jul 13, 1971Weber ErichRotary foraminous printing machine with magnetically attracted internal inker
US3663075 *Feb 18, 1971May 16, 1972Gen Dynamics CorpSelf-centering permanent magnet bearing
US3768532 *Jan 17, 1972Oct 30, 1973I AraiMagnet tire
US3777707 *May 26, 1971Dec 11, 1973Int Standard Electric CorpMagnetic power handling arrangement
US3804011 *Mar 5, 1971Apr 16, 1974Zimmer PRoller squeegee with resilient teeth to increase liquid penetration
US3836384 *Sep 26, 1969Sep 17, 1974Fuji Photo Film Co LtdImaging systems
US3895846 *Sep 5, 1974Jul 22, 1975Honeywell Inf SystemsMagnetic ball retaining apparatus
US4014289 *Sep 12, 1975Mar 29, 1977Johannes ZimmerDevice for treating a web
US4340261 *Apr 25, 1979Jul 20, 1982Teldix GmbhMagnetic bearing arrangement
US4417515 *Aug 19, 1981Nov 29, 1983Mathias MitterLateral support for squeegee
US4493197 *Sep 29, 1982Jan 15, 1985Meiler Hans EFor applying liquor to a web of textile materials
US4948467 *May 17, 1989Aug 14, 1990The Black Clawson CompanyExtended nip press with induced repulsion
US4974509 *Jun 27, 1988Dec 4, 1990Johannes ZimmerSqueegee device
US5003872 *Jun 23, 1989Apr 2, 1991Morlock Mechanik GmbhDevice for applying color to a block of a tampon printing machine
US5063873 *Mar 29, 1990Nov 12, 1991Johannes ZimmerDoctor device
US5134958 *May 18, 1988Aug 4, 1992Johannes ZimmerDoctor apparatus for applying fluid material to a substrate
US5148743 *Jun 6, 1990Sep 22, 1992Johannes ZimmerCoating machine with magnetically operated doctor blade (squeegee)
US5151132 *Jan 5, 1990Sep 29, 1992Johannes ZimmerArrangement for applying substances to a web of material
US5156682 *May 18, 1988Oct 20, 1992Johannes ZimmerPressing device for doctor having segments linked together
US5392706 *Jul 30, 1992Feb 28, 1995Markem CorporationPad transfer printing method
US5445249 *Feb 18, 1994Aug 29, 1995Kabushiki Kaisha ToshibaDynamic vibration absorber
US6257133 *Mar 15, 1999Jul 10, 2001International PaperMethod and apparatus for controlling cross directional nip dynamics
WO1990014466A1 *May 10, 1990Nov 18, 1990Black Clawson CoExtended nip press with induced repulsion
Classifications
U.S. Classification101/123, 118/207, 68/202, 118/258, 100/917, 310/90.5, 335/285, 101/120, 68/103, 101/124
International ClassificationB41F15/42
Cooperative ClassificationB41F15/426, Y10S100/917
European ClassificationB41F15/42D