US2591043A - Powder separator and dispenser - Google Patents

Powder separator and dispenser Download PDF

Info

Publication number
US2591043A
US2591043A US742759A US74275947A US2591043A US 2591043 A US2591043 A US 2591043A US 742759 A US742759 A US 742759A US 74275947 A US74275947 A US 74275947A US 2591043 A US2591043 A US 2591043A
Authority
US
United States
Prior art keywords
valve
separator
powder
recess
dispenser
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
US742759A
Inventor
Richard F Berndt
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.)
Virkotype Corp
Original Assignee
Virkotype 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 Virkotype Corp filed Critical Virkotype Corp
Priority to US742759A priority Critical patent/US2591043A/en
Application granted granted Critical
Publication of US2591043A publication Critical patent/US2591043A/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
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/06—Powdering devices, e.g. for preventing set-off

Definitions

  • This invention relates to a powder separator and dispenser, and while the same is particularly applicable to the process of raised printing, in which powder is distributed upon a traveling sheet or web of material containing a wet impression, it will be apparent that the same may be variously employed, such as in grading finely divided or pulverized particles according to weight.
  • the invention has primarily for its object to provide a comparatively simple, fast, and efcient mechanism, for separating the light and heavy particles in pulverized or powdered material.
  • a more specific object of the invention resides in the provision of a centrifugal air separator equipped with a rotary discharge valve for uniform delivery of the heavier separated particles.
  • a further object in connection with raised printing machines is to provide suction means connnunicating with the separator for removing surplus powder from a printed surface for cleaning, grading, and subsequent distribution.
  • Another object is to provide means for controlling the character of separation, whereby particles of varying predetermined weight may be segregated for distribution.
  • Fig. 1 is an elevational view, partially in section, of a device incorporating principles of the present invention and illustrating the device applied to a raised printing machine;
  • Fig. 2 is an enlarged fragmentary vertical sectional view taken on the line 2-2 of Fig. 3;
  • Fig. 3 is a similar view taken on the line 3--3 of Fig. 2;
  • FIG. 4 is a schematic illustration of a modified a printed and dusted sheet of material, traveling on a belt 8 over a carrier roll 9 in a raised printing machine.
  • the distributing valve 3 comprises a pair of circular end plates I0, the inner faces of which are provided with spaced radial grooves II for reception of the ends of a plurality of ns I2.
  • the circular end plates I0 are mounted on a shaft I3, which is grooved longitudinally for re- ⁇ Y'ception of the inner edges of the ns I2.
  • the ends of the shaft I3 are journaled in bearings I4 carried by the stand I, and in that form of the invention illustrated in Figs. 1 to 3, the valve is continuously rotated by a suitable driving connectionywith a sprocket or pulley I5 secured to one end of the shaft I3.
  • ns I2 serve to divide the valve 3 into a plurality of annular disposed pockets, which receive powdered material from the centrifugal separator 4 through an 1971 I6 formed in the valve body 2, and providing a communication between a depending delivery spout I8, comprising part of the centrifugal separator, and a semi-circular recess I1 in the valve body in which the valve 3 rotates.
  • the recess I'I have no underhanging portions upon which powder passing through the valve might be supported, because the characteristics of the powder with which it is contemplated that my apparatus will be used are such that it will tend to build up on such underhanging portions and clog the valve. Therefore the circularly arcuate recess II must not subtend an angle of more than For the purpose to be later described in connection with the operation of the present device, in some instances it is desired to provide a variable circulation of air through the heavier particles prior to their delivery into the pockets of the valve 3.
  • One method by which this may be accomplished is to provide a variable clearance between the outer ends of the radial fins I2 and the annular recess I1 in the valve body 2.
  • the Aiins I2 are, therefore, slidably mounted in the grooves II of the circular end plates I0 and the longitudinal grooves in the shaft I3.
  • the same are provided on their opposite ends with pins I9 that extend through slots 20, formed in the circular end plates I0 and into a series of tangential slots 2l formed in a pair of annular rings 22, carried by and rotatably adjustable with relation to the end plates.
  • Set screws 23 serve to lock the rings 22 and ns I2 in adjusted position.
  • the printed and dusted sheet then travels below the suction head I of the nozzle 6, and surplus powder not adhered to the sheet is collected and drawn into the separator casing d by the reduced pressure created therein.
  • clearance between the fins I2 and the valve body recess Il' is controlled by radial shifting of the ns to vary the up-iow of air around the Valve and through the separator.
  • Radial adjustment of the fins i2 is easily accomplished in the structure described by loosening the set screws 23 and rotating the rings 22, in which the tangential slots engage the pins I9 carried by the ns to cause the ns to shift inwardly o1' outwardly, depending upon the direction of rotation of the rings.
  • FIG. 4 An alternate method of introducing a regulated circulation of air through the separate heavier' particles prior to their delivery into the valve pockets, is shown in Fig. 4, in which the valve I2 are not adjustable, but closely fitted to the valve recess Il to provide practically no clearance. Instead an elongated slotl 2d provided in the valve body, and controlled by a plug valve 25, forms an air passage to the valve varnish I6.
  • the powdered material can be delivered directly to the suction head 'I from a hopper or other source of supply, and the collected -heavier particles discharged into a suitable receiving container.
  • a valve for controlling the flow of powder from the separator which comprises a valve body having an inlet horrinously in its upper sideadapted to receive powder from the separator, a recess in the bottom side of the valve block and in communication with said orifice, said bottom side of the valve block lying in a substantially horizontal plane and said recess being cireularly.arcuate-in cross section and subtending an angle of not substantially more than and a dispensing valve mounted to rotate through said-recess,said dispensing valve including spaced radial fins forming. a. plurality of receiving pockets, andsaid fins being spaced from the wall of said-recess. toallow passage .of air into said separator through said recess and said inletorice.
  • a-valve. for controlling tliev flow ofA powder fromV
  • the separator which comprises a valve body having an inlet orifice in its lupper side adapted to receive powder from the separator, a dispensing-valve rotatably mounted in the-valve body on a supporting shaft and including lspaced radialnS-mounted in longitudinal grooves in the shaft and formingy a plurality of receiving pockets, said fins being spaced from the valve body to allow passage of air into the separator through the valvebody and having pins at their opposite ends, va-pair of 4relatively rotatable adjusting plates.
  • valve asset forth in claim,2 which includes a recess in the bottom side of the valve blockV and in communication with said inlet orince, said recess being adapted to have the dispensing valve rotate through it and being circularly arcuate in crosssection and subtending an angle of not more than 180.
  • a valve for controlling the ow of powderF from the separator which comprises a valve body having an inlet orifice in the upper side adapted to receive powder from the separator, a recess in the bottom side of the valve block and in communication with said orilce, said bottom side of the valve block lyingv in a substantially horizontal plane and said recess being circularly arcuate in cross section and subtending an angle of not substantially more than 180, a dispensing valve mounted to rotate through said recess, said dispensing valve including spaced radial fins forming a plurality of receiving pockets, the radially outer edges of said fins being spaced from the wall of said recess to allow passage of air into said separator through said recess and said inlet perennial, and means for radially adjusting said fins to regulate the spacing of said outer fin edges from the recess wall thereby to regulate said passage of air.

Description

Ap 1, 1952 R. F. BERND'T POWDER sEPARAToR Agn DISPENSER Filed April 19. 1947 Patented pr. 1, 1951? POWDER SEPARATOR AND DISPENSER Richard F. Berndt, Racine, Wis., assignor to Virkotype Corporation, a corporation oi' Virginia Application April 19, 1947, Serial No. 742,759
4 Claims.
This invention relates to a powder separator and dispenser, and while the same is particularly applicable to the process of raised printing, in which powder is distributed upon a traveling sheet or web of material containing a wet impression, it will be apparent that the same may be variously employed, such as in grading finely divided or pulverized particles according to weight.
The invention has primarily for its object to provide a comparatively simple, fast, and efcient mechanism, for separating the light and heavy particles in pulverized or powdered material.
Incidental to the foregoing, a more specific object of the invention resides in the provision of a centrifugal air separator equipped with a rotary discharge valve for uniform delivery of the heavier separated particles.
A further object in connection with raised printing machines, is to provide suction means connnunicating with the separator for removing surplus powder from a printed surface for cleaning, grading, and subsequent distribution.
Another object is to provide means for controlling the character of separation, whereby particles of varying predetermined weight may be segregated for distribution.
In addition to the foregoing, other objects will appear as the description proceeds, and while'the accompanying drawing illustrates one complete physical form of the invention constructed in accordance with the best mode so far devised, it is to be understood that changes in the precise embodiment of the invention are contemplated within the scope of the appended claims.
In the drawing:
Fig. 1 is an elevational view, partially in section, of a device incorporating principles of the present invention and illustrating the device applied to a raised printing machine;
Fig. 2 is an enlarged fragmentary vertical sectional view taken on the line 2-2 of Fig. 3;
Fig. 3 is a similar view taken on the line 3--3 of Fig. 2; and
pressure is created through a suction line 5 com- .municating with one side of the casing. A nozzle 4Ii carried by the separator casing, and communisuction head l for collecting surplus powder from Fig. 4 is a schematic illustration of a modified a printed and dusted sheet of material, traveling on a belt 8 over a carrier roll 9 in a raised printing machine.
The distributing valve 3 comprises a pair of circular end plates I0, the inner faces of which are provided with spaced radial grooves II for reception of the ends of a plurality of ns I2.
The circular end plates I0 are mounted on a shaft I3, which is grooved longitudinally for re-` Y'ception of the inner edges of the ns I2.
The ends of the shaft I3 are journaled in bearings I4 carried by the stand I, and in that form of the invention illustrated in Figs. 1 to 3, the valve is continuously rotated by a suitable driving connectionywith a sprocket or pulley I5 secured to one end of the shaft I3.
Obviously, the ns I2 serve to divide the valve 3 into a plurality of annular disposed pockets, which receive powdered material from the centrifugal separator 4 through an orice I6 formed in the valve body 2, and providing a communication between a depending delivery spout I8, comprising part of the centrifugal separator, and a semi-circular recess I1 in the valve body in which the valve 3 rotates.
It is important that the recess I'I have no underhanging portions upon which powder passing through the valve might be supported, because the characteristics of the powder with which it is contemplated that my apparatus will be used are such that it will tend to build up on such underhanging portions and clog the valve. Therefore the circularly arcuate recess II must not subtend an angle of more than For the purpose to be later described in connection with the operation of the present device, in some instances it is desired to provide a variable circulation of air through the heavier particles prior to their delivery into the pockets of the valve 3. One method by which this may be accomplished is to provide a variable clearance between the outer ends of the radial fins I2 and the annular recess I1 in the valve body 2. The Aiins I2 are, therefore, slidably mounted in the grooves II of the circular end plates I0 and the longitudinal grooves in the shaft I3. For radially shifting the ns, the same are provided on their opposite ends with pins I9 that extend through slots 20, formed in the circular end plates I0 and into a series of tangential slots 2l formed in a pair of annular rings 22, carried by and rotatably adjustable with relation to the end plates. Set screws 23 serve to lock the rings 22 and ns I2 in adjusted position.
During operation of the machine, pressure within the casing 4 is reduced through the suction line 5, and the valve 3 is rotated by the drive sprocket I5, or by gravity as hereinafter described. An initial supply of powder contained in the chute I' is then released by raising a gate I,
and discharged in a iine stream transversely of the traveling belt 3 to either sheets or a web of material previously receiving awet or printed impression, causing a portion of the powder to adhere to the sheet.
The printed and dusted sheet then travels below the suction head I of the nozzle 6, and surplus powder not adhered to the sheet is collected and drawn into the separator casing d by the reduced pressure created therein.
Due to the centrifugal air action created within'theseparatOr, the heavier particles of powder are4 discharged through the spout I3 into the pockets ofthe valve 3, while the lighter particles anddioating dust are removed through the suctionline. Rotation of the valve 3 then causes the'collected powder to be delivered to chute I' .for 'repeated use.
Thus it will be seen that although the surplus powder is repeatedly used, the same is continuously cleaned and graded to provide a uniform :supply tothe printed material traveling under the chute I.
Inasmuch as the present dispenser permits the useofacomparatively large orice through which materialis delivered from the separator to the Y.rotary valve, static is reduced to a minimum, andV because of a slight 11p-draft pass the valve and through .the separator, afurther separating action occurs to remove the fine particles or dust that' might adhere to the heavier particles discharged into the delivery spout I through centrifugal action ofthe separator.
In some instances itmay be desired to eliminateA the external drive of. the rotary valve 3, as shown in the modication illustrated in Fig. 4, in which the center `of the valve is oiTset laterally with relation to the axis of the orifice i5, thus causing over-balance of the valve to affect its rotation.
For the purpose of regulating, grading, and separation of the nely divided particles to a high degree of accuracy, clearance between the fins I2 and the valve body recess Il' is controlled by radial shifting of the ns to vary the up-iow of air around the Valve and through the separator. Radial adjustment of the fins i2 is easily accomplished in the structure described by loosening the set screws 23 and rotating the rings 22, in which the tangential slots engage the pins I9 carried by the ns to cause the ns to shift inwardly o1' outwardly, depending upon the direction of rotation of the rings.
An alternate method of introducing a regulated circulation of air through the separate heavier' particles prior to their delivery into the valve pockets, is shown in Fig. 4, in which the valve I2 are not adjustable, but closely fitted to the valve recess Il to provide practically no clearance. Instead an elongated slotl 2d provided in the valve body, and controlled by a plug valve 25, forms an air passage to the valve orice I6.
From the foregoing explanation considered in connection with the accompanying drawing, it
will be apparent that an exceedingly simple and eflicient centrifugal air separator and dispenser has been devised for grading and cleaning pulverized or finely divided powdered particles, and when applied to a raised printing machine, a continuous even flow of uniform material is delivered to a traveling printed sheet, from which excess powder is removed and cleaned for subsequent use, thusl effecting a material economy in the consumption of powder, and insuring a high quality of raised printing.
When merely used for grading, the powdered material can be delivered directly to the suction head 'I from a hopper or other source of supply, and the collected -heavier particles discharged into a suitable receiving container.
I claim:
l.- In apparatus of the type described including a centrifugal separator, a valve for controlling the flow of powder from the separator which comprises a valve body having an inlet orice in its upper sideadapted to receive powder from the separator, a recess in the bottom side of the valve block and in communication with said orifice, said bottom side of the valve block lying in a substantially horizontal plane and said recess being cireularly.arcuate-in cross section and subtending an angle of not substantially more than and a dispensing valve mounted to rotate through said-recess,said dispensing valve including spaced radial fins forming. a. plurality of receiving pockets, andsaid fins being spaced from the wall of said-recess. toallow passage .of air into said separator through said recess and said inletorice.
2. In apparatus yof thertype described including a centrifugal separator, a-valve. for controlling tliev flow ofA powder fromV the separator which comprises a valve body having an inlet orifice in its lupper side adapted to receive powder from the separator, a dispensing-valve rotatably mounted in the-valve body on a supporting shaft and including lspaced radialnS-mounted in longitudinal grooves in the shaft and formingy a plurality of receiving pockets, said fins being spaced from the valve body to allow passage of air into the separator through the valvebody and having pins at their opposite ends, va-pair of 4relatively rotatable adjusting plates. ateach of the opposite ends of the dispensing valve, and av setscrew for vfixing each, pair of plates together, theinner plates having radial grooves formedtherein into which the ends of the fins extend, the Dins extending through radialj slots in said inner plates, and the outer'plates having non-radial slots-for receiving the pins, whereby when the inner and outer plates are rotated relative to one another, the iins are moved radially to adjust the spacing between them andthe valve body.
3; In apparatus ofthe type described including a centrifugal separator, a valve asset forth in claim,2 which includes a recess in the bottom side of the valve blockV and in communication with said inlet orince, said recess being adapted to have the dispensing valve rotate through it and being circularly arcuate in crosssection and subtending an angle of not more than 180.
4. Inapparatus of the type described including a centrifugal separator, a valve for controlling the ow of powderF from the separator which comprises a valve body having an inlet orifice in the upper side adapted to receive powder from the separator, a recess in the bottom side of the valve block and in communication with said orilce, said bottom side of the valve block lyingv in a substantially horizontal plane and said recess being circularly arcuate in cross section and subtending an angle of not substantially more than 180, a dispensing valve mounted to rotate through said recess, said dispensing valve including spaced radial fins forming a plurality of receiving pockets, the radially outer edges of said fins being spaced from the wall of said recess to allow passage of air into said separator through said recess and said inlet orice, and means for radially adjusting said fins to regulate the spacing of said outer fin edges from the recess wall thereby to regulate said passage of air.
RICHARD E. BERNDT.
REFERENCES C'EED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 789,593 Doriel May 9, 1905 Number Number 20 351,481
6 Name Date Broome Nov. 2, 1915 Plaistecl July 9, 1918 Laukhui Nov. 11, 1924 MacArthur Dec. 22, 1925 Wallace Aug. 11, 1931 Bramwell Nov. 22, 1932 Norman Oct. 3, 1933 ipsius T Oct. 17, 1933 Andrewsiet al. Apr. 3, 1934 Smith et al May 28, 1937 Woodward Feb. 22, 1938 Eissmann June 27, 1939 Whitlock June 11, 1940 Meyer Jan. 1l, 1944 Wall et al Jan. 23, 1945 FOREIGN PATENTS Country Date Great Britain June 22, 1931
US742759A 1947-04-19 1947-04-19 Powder separator and dispenser Expired - Lifetime US2591043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US742759A US2591043A (en) 1947-04-19 1947-04-19 Powder separator and dispenser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US742759A US2591043A (en) 1947-04-19 1947-04-19 Powder separator and dispenser

Publications (1)

Publication Number Publication Date
US2591043A true US2591043A (en) 1952-04-01

Family

ID=24986089

Family Applications (1)

Application Number Title Priority Date Filing Date
US742759A Expired - Lifetime US2591043A (en) 1947-04-19 1947-04-19 Powder separator and dispenser

Country Status (1)

Country Link
US (1) US2591043A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000497A (en) * 1957-06-16 1961-09-19 Angelo J Rossi Salt purification, reclamation and treatment plant
US3017993A (en) * 1958-12-31 1962-01-23 Aerofall Mills Inc Air classification system
US3062414A (en) * 1958-02-10 1962-11-06 Chain Belt Co Air assisted vibratory hopper discharge
DE1170782B (en) * 1955-02-18 1964-05-21 Battelle Development Corp Dust cloud generator for xerographic purposes
US4125456A (en) * 1977-03-22 1978-11-14 Phillips Petroleum Company Method and apparatus for separating particulate materials
EP0839651A1 (en) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Powdering method, specially for printed sheet materials in a printing machine
EP0839650A1 (en) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Powdering device

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US789593A (en) * 1904-12-15 1905-05-09 Charles Dorffel Automatic ash-dump.
US1159168A (en) * 1915-05-20 1915-11-02 Christopher C Broome Separator for cotton-ginning mechanism.
US1272311A (en) * 1918-07-09 Williams Patent Crusher & Pulv Pneumatic separating system.
US1514915A (en) * 1921-08-15 1924-11-11 Albert O Trostel Separator
US1566800A (en) * 1924-04-21 1925-12-22 Charles Eneu Johnson And Compa Device for offset prevention and surface finishing in printing
GB351481A (en) * 1930-03-22 1931-06-22 Hermann Hildebrandt Improved sifting device with rotary blade wheel
US1818367A (en) * 1927-01-31 1931-08-11 Halbert C Wallace Grain cleaner
US1888372A (en) * 1929-08-06 1932-11-22 Birtley Iron Company Ltd Separation of dry materials
US1928791A (en) * 1931-10-23 1933-10-03 Fibre Making Processes Inc Chip duster
US1930814A (en) * 1931-03-13 1933-10-17 Lipsius Samuel Powdering apparatus
US1953058A (en) * 1932-09-15 1934-04-03 American Pulverizing Corp Separator
US2003267A (en) * 1933-03-21 1935-05-28 Smith Gabriel Machine for dusting sheet materials
US2109205A (en) * 1935-06-04 1938-02-22 Woodward Ralph Machine for producing raised printing
US2163833A (en) * 1934-10-13 1939-06-27 Universelle Clgarettenmaschine Apparatus for comminuting and classifying tobacco
US2204032A (en) * 1937-08-02 1940-06-11 Boardman Company Seed cleaner
US2338956A (en) * 1941-03-15 1944-01-11 Champion Pecan Machine Company Machine for separating meats and shell fragments of edible nuts
US2367906A (en) * 1942-01-09 1945-01-23 Wall Apparatus for separating wood flour

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1272311A (en) * 1918-07-09 Williams Patent Crusher & Pulv Pneumatic separating system.
US789593A (en) * 1904-12-15 1905-05-09 Charles Dorffel Automatic ash-dump.
US1159168A (en) * 1915-05-20 1915-11-02 Christopher C Broome Separator for cotton-ginning mechanism.
US1514915A (en) * 1921-08-15 1924-11-11 Albert O Trostel Separator
US1566800A (en) * 1924-04-21 1925-12-22 Charles Eneu Johnson And Compa Device for offset prevention and surface finishing in printing
US1818367A (en) * 1927-01-31 1931-08-11 Halbert C Wallace Grain cleaner
US1888372A (en) * 1929-08-06 1932-11-22 Birtley Iron Company Ltd Separation of dry materials
GB351481A (en) * 1930-03-22 1931-06-22 Hermann Hildebrandt Improved sifting device with rotary blade wheel
US1930814A (en) * 1931-03-13 1933-10-17 Lipsius Samuel Powdering apparatus
US1928791A (en) * 1931-10-23 1933-10-03 Fibre Making Processes Inc Chip duster
US1953058A (en) * 1932-09-15 1934-04-03 American Pulverizing Corp Separator
US2003267A (en) * 1933-03-21 1935-05-28 Smith Gabriel Machine for dusting sheet materials
US2163833A (en) * 1934-10-13 1939-06-27 Universelle Clgarettenmaschine Apparatus for comminuting and classifying tobacco
US2109205A (en) * 1935-06-04 1938-02-22 Woodward Ralph Machine for producing raised printing
US2204032A (en) * 1937-08-02 1940-06-11 Boardman Company Seed cleaner
US2338956A (en) * 1941-03-15 1944-01-11 Champion Pecan Machine Company Machine for separating meats and shell fragments of edible nuts
US2367906A (en) * 1942-01-09 1945-01-23 Wall Apparatus for separating wood flour

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170782B (en) * 1955-02-18 1964-05-21 Battelle Development Corp Dust cloud generator for xerographic purposes
US3000497A (en) * 1957-06-16 1961-09-19 Angelo J Rossi Salt purification, reclamation and treatment plant
US3062414A (en) * 1958-02-10 1962-11-06 Chain Belt Co Air assisted vibratory hopper discharge
US3017993A (en) * 1958-12-31 1962-01-23 Aerofall Mills Inc Air classification system
US4125456A (en) * 1977-03-22 1978-11-14 Phillips Petroleum Company Method and apparatus for separating particulate materials
EP0839651A1 (en) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Powdering method, specially for printed sheet materials in a printing machine
EP0839650A1 (en) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Powdering device

Similar Documents

Publication Publication Date Title
US4260478A (en) Apparatus for classifying particles
US2591043A (en) Powder separator and dispenser
US3615008A (en) Centrifugal classifying system
US2300324A (en) Method of and mechanism for classifying finely comminuted material
US1711464A (en) Grinding machine
US2238364A (en) Distributor head for dehydrators
US1706417A (en) Mixing machine
US2068146A (en) Seed sorting machine
US1977321A (en) Method and apparatus for applying materials to surfaces
US2237787A (en) Feed mixer
US2210505A (en) Machine for classifying fine-grained materials
US3570576A (en) Continuous dehydration apparatus
US2276328A (en) Coating apparatus
WO2016101835A1 (en) Distributor for ore sorting
US2789773A (en) Vibrating ball mill having baffle plate for preventing short circuiting of material through the mill
US2274887A (en) Apparatus for separating commingled stock
US3454263A (en) Process and apparatus for agglomerating particulate materials and high speed mixer therefor
US3966127A (en) Centrifugal device and process for concurrently rupturing and pulverizing granular material, particularly cereal grain
US2448038A (en) Disintegrator and vortical classifier for solids
US2223366A (en) Abrasive throwing equipment
US1041909A (en) Classifier.
US1617971A (en) Magnetic separator
WO2016101834A1 (en) Distributor for ore sorting
US2175272A (en) Automatic powdering machine for thermographic raised printing
US2330969A (en) Grinding apparatus