US3460296A - Metalworking - Google Patents

Metalworking Download PDF

Info

Publication number
US3460296A
US3460296A US589099A US3460296DA US3460296A US 3460296 A US3460296 A US 3460296A US 589099 A US589099 A US 589099A US 3460296D A US3460296D A US 3460296DA US 3460296 A US3460296 A US 3460296A
Authority
US
United States
Prior art keywords
selenium
particles
beads
stripping
coating
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
US589099A
Other languages
English (en)
Inventor
Charles A Dittmar
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of US3460296A publication Critical patent/US3460296A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/12—Apparatus using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • This invention relates to a method for mechanically working metal and, in particular, to mechanically stripping a coating of relatively hard material from a soft support material.
  • this invention relates to a method for mechanically removing a selenium coating from a soft metal support material such as aluminum without damaging the support material.
  • stripping is a process for separating two components which are bonded together in some manner so that one or both of the components can be reclaimed.
  • mechanical stripping methods that is, a mechanical means such as shot blasting or the like for removing one material from the other, were directed towards breaking down and/or abrading the outer component from the support component. This breaking down and/or tearing apart of the outer material oftentimes required high forces which caused the inner support material to be permanently damaged. This was especially true when the substrate was made of a relatively soft material unable to withstand these high localized mechanical forces without being damaged.
  • a means of mechanically stripping or mechanically working a metal which is in wide commercial use today is the method of shot blasting in which a relatively hard material is hurled against the surface to be worked/ or removed, the shot particle delivering sufiicient mechanical energy required to perform the work.
  • smooth shot such as glass beads or steel balls are utilized to break down the coating material by sheer force of impact.
  • rough particles such as aluminum oxide, silica, or chilled iron are also used to abrade or tear away the coating material.
  • the support material becomes exposed to the forces delivered by the shot stream. If the support material does not have the physical properties to withstand the forces so delivered, the support material A6296 Patented Aug. 12, 1969 will be damaged to a point where it is no longer reclaimable without further costly operations being performed thereon.
  • Hight pressure water stripping is a commercial method in which a relatively inexpensive medium, water, is used to remove one component from the other. This mechanical method lends itself readily to uses in cases where one component is loosely adhered to the other. However, to remove closely bonded materials, water under extremely high pressure must be used. Because of these high pres sures, the equipment is very costly and expensive to maintain. A high pressure water stream will'break away particles of hard coating but the water stream continues to deliver energy to these removed particles embedding them in the relatively soft support material. It is believed that the particles become entrapped in the incompressible water stream and are then forced under high pressures into the exposed areas of substrate. This effect generally occurs when the coating material does not completely cover the softer substrate thus leaving a tapered edge exposed to the water stream. Coating material in the thinner sections of the edge being more elastic is driven into the substrate rather than being fractured and removed by the water.
  • Another object of this invention is to improve the method of mechanically stripping a relatively hard material from a support of relatively soft material Without damaging the softer support material.
  • Another object of this invention is to deliver mechanical energy to a work zone over a relatively long period of time rather than by sudden impact.
  • a still further object of this invention is to improve the method of removing a relatively hard coating of selenium from a relatively soft support material without damaging the support material.
  • Another object of this invention is to improve method of removing a selenium coating from a xerographic photoconductor so that the selenium is recoverable and the photoconductor is resuable.
  • Yet another object of this invention is to provide a continuous process for stripping xerographic drums.
  • FIG. 1 is a side elevation of the blast cabinet and conveyor system related thereto containing the present invention
  • FIG. 2 is a partial section through the blast cabinet shown in FIG. 1 and taken along line 2-2 of FIG 1;
  • FIG. 3 is a side elevation of a type of automatic stripping and recovering system utilized in the present inven tion;
  • FIG. 4 is a partial section of an electrostatic separator taken along lines 4-4 of FIG. 3;
  • FIG. 5 shows in schematic form a process for stripping selenium in accordance with the present invention.
  • a plate comprising a conductive material upon which is coated a layer of photoconductive material, is uniformly electrostatically charged over its entire surface.
  • the charged plate is then exposed to a light image causing the electrostatic potential stored on the photoconductive material to be imparted to the conductive backing at a predetermined rate thereby forming a latent electrostatic image.
  • This latent image can then be developed by any suitable means to produce a visual presentation of the original light image.
  • the xerographic plate in widest commercial use today comprises a photoconductive layer of selenium which is between and 75 microns thick.
  • This photoconductive layer is generally placed upon a drum of conductive material such as aluminum or brass.
  • a plate as herein described, is disclosed by Bixby in US. lPatent 2,970,906.
  • the exact molecular structure of the selenium coating is not known with certainty, it is known that the selenium bonded to the support material is in a hard amorphous or vitreous form.
  • it has been found commercially impractical to mechanically remove this relatively hard selenium coating from the soft conductive backing because the mechanical forces required were such as to seriously damage the soft conductive support and thereby render the support unreclaimable.
  • the present invention constitutes a new approach to mechanically working or removing material.
  • a particle is impinged against the work, the particle being capable of delivering mechanical energy over a relatively long period of time rather than in a sudden contained burst at impact.
  • a particle which has: (1) a modulus of elasticity below that of the soft surface to be impacted so that the bead rather than the soft material will be deformed upon initial impact; (2) a high yield point so that the head can be deformed without exceeding its elastic limits; and (3) a high resilience (resilience being the ability of a body to absorb impact stresses as well as static loads) so that the head will return to its original shape after the impact forces causing deformation are removed, the energy stored in deforming the particle then being imparted to a work surface contacted.
  • the amount of work required in deforming a body within its proportional limits is substantially equal to'the energy stored within the body. A body so deformed will give up this stored energy as it returns to its original shape or posture.
  • a particle is hurled at the surface to be mechanically worked with a force high enough to impart sufiicient energy to the particle to perform the required work.
  • the impacting force is held below that at which the particle would be permanently deformed or fractured. It is believed that mechanical energy is delivered to the work surface by a particle of the type herein described in steps or increments rather than in a sudden or sharp burst of energy.
  • the elastic particle releases all of its energy upon impact; part of this energy is delivered to the work surface at the moment of impact and part of the energy is returned to the particle in work energy used to deform the particle within its elastic limit. It should be noted that a slight amount of energy is lost as heat or friction, however, most of the total energy of deformation is stored as internal energy.
  • the particle being resilient, it will continue to deliver this internally stored work energy to the impacted surface as the deforming force, that is, the force of impact, is removed. Because this resultant force is a sustained force rather than a pure impact force, a relatively soft mate- 4 rial can be worked without fear of damage. That is, a large amount of mechanical work can be delivered by the shot particles without the harsh and oftentimes damaging effect of pure impact forces.
  • Drums 10 are loaded upon endless belt conveyor 15 which transports the drums through blast cabinet 20.
  • the blast cabinet generally indicated 20, is supported by legs 21 and includes front and rear walls and opposite end walls designated 22, 25, 23, and 24, respectively.
  • Front wall 22 contains a window 26 through which the operator may view drums in the cabinet during the stripping operations.
  • End walls 23 and 24 have ingress and egress ports, respectively, therein through which a drum seated on conveyor 15 can be transported in and out of the blast cabinet.
  • Located at the egress port is a gravity roll conveyor 16 capable of transporting drums leaving the endless belt out of the blast cabinet.
  • Blast shields 29 are slidably mounted in the cabinet to contain shot particles and material removed from the drum within a defined work zone.
  • the work zone is defined by the area over which the nozzle directs shot particles and the size of this work zone will vary as the number of nozzles and the angle at which the nozzles are mounted is varied.
  • Transport conveyor 15 comprises a series of flat base plates 35 which are flexibly joined by means of links 36 so that the plates cooperate to form an endless belt.
  • the endless belt is driven in the direction indicated, by means of drive motor 32 (FIG. 2), or any suitable drive mechanism, acting in conjunction with a transmission (not shown) to control the speed of the endless belt.
  • a belt adjuster 17 is also provided to control the tension on the endless belt.
  • each individual base plate 35 has affixed thereon two separate U-shaped cradles 38 having rotatably mounted therein cylindrical shaped trunnions 37.
  • the two trunnions are mounted so that their center lines are substantially parallel to each other and coaxial with the direction of belt travel.
  • the rear or fixed trunnion that is, the trunnion which is transported closest to rear wall of the blast cabinet, is permanently aflixed to the base plate while the forward or adjustable trunnion is slidably mounted on the base plate in slotted holes 39.
  • Drums of varying diameters can be accommodated by simply loosening bolts and adjusting the distance between the two parallel rows of trunnion rollers so that a drum of desired diameter can be seated therebetween.
  • a series of rings 41 Positioned along the cylindrical body of fixed trunnions 37, and coaxial therewith, are a series of rings 41 made of silicone rubber or similar resilient material having good wear properties as well as a high coefficient of friction.
  • the drums shown in FIG. 2 are seated between the two rows of rollers and are in friction bearing contact with rings 41.
  • the nozzle/or nozzles located in the work zone are retained therein in a stationary position.
  • the drum In order to strip the entire surface area of the drum, the drum is rotated as it is transported past the nozzle stream so that the shot particles come in contact with the entire outer periphery of the drum.
  • the drum is thus stripped in a spiral fashion much like the geometric shape described by a screw being turned in a nut.
  • Cylindrical drive roll 45 is rotatably mounted on shaft 46 which is journaled at one end in bearing housing 47 and at the other end in gear box 48.
  • Driving power to the drive roll is supplied by drive motor 49 through gear box 48, the speed of rotation being controlled by selection of the desired gear ratio.
  • Rotational forces are imparted to the xerographic drum from cylindrical drive roll 45 through means of trunnion rollers 37 as the trunnions are being moved through the work zone.
  • the fiat base plates comprising the endless belt ride into sliding contact with rails 50 which in turn place the fixed row of trunnions at the proper elevation so that the rubber rings mounted thereon contact the cylindrical drive roll at approximately its horizontal center lines.
  • Guide plate 51 located in the front of the cabinet, is biased by means of resilient rubber member 52 against the flat base plates 35 as the base plates pass through the work zone. The biasing pressure in turn holds trunnions 37 in bearing contact with the cylindrical drive rolls 45 while in the work zone thus imparting a rotational motion to the xerographic drums mounted thereon.
  • a vibratory bed 55 upon which particles of selenium and beads being dislodged from a drum fall.
  • a screen is mounted in the bed which will pass all the plastic beads and the smaller selenium particles.
  • the bed is inclined toward one end of the cabinet so that larger particles retained thereon will be transported towards this low end by the vibratory motion.
  • Located at the low end of the bed is an Opening to which is affixed flexible line 57 through which the large particles of selenium fall into recovery receptacle 58.
  • the vibratory bed is motivated by means of eccentric arm 59 which is being rotated by drive motor 60.
  • baffle plates Located in the work zone between the upper delivery section of the endless belt and the lower return section thereof is a series of baffle plates (not shown) which direct the flow of beads and particles leaving a work piece around the belt rather than through the lower return section so that all of the residue from the stripping operation falls on the vibratory screen rather than being carried out of the cabinet on the conveyor belt.
  • the beads and smaller particles of selenium being passed through the screen fall into funnel shaped conveyors 61 and 62.
  • a negative air pressure is maintained in the blast cabinet by means of a fan and motor located in dust collector 65 which acts through line 66 (FIG. 3). Due to the negative air pressure being maintained on the system, the beads and smaller selenium particles collected in funnel shape conveyors 61 and 62 are transported through lines 66 to hopper 67 located just below the dust collector as shown in FIG. 3. Dust collector 62, which is similar to a household vacuum cleaning system, will exhaust from the system any dust or lint particles which may have entered the blast cabinet through the ingress and egress ports. The dust particles are collected in vacuum bags (not shown) and then removed from the system.
  • an electrostatic separator 70 used to divide the recovered selenium particles from the plastic beads.
  • the flow of beads and particles from hopper 67 to the separator is controlled by means of control valve 68 which meters the flow of particles and beads passing through supply line 69.
  • the plastic beads and selenium metal acquire different triboelectric charges when hitting or rubbing together as they do during transit, that is, one material will become triboelectrically more positive in reference to the other.
  • the combined beads and selenium particles which have acquired 'a triboelectric charge due to their movement through line 66 are supplied to hopper 72 located in the electrostatic separator.
  • hopper 72 located in the electrostatic separator.
  • screw conveyor 73 Located in hopper 72 is screw conveyor 73 which spreads the material so that it will pass to the first separating stage evenly along the entire length of the separator.
  • the material to be separated is gravity fed between grounded roll 74 and charged electrode 75, the charged electrode being at a potential which is either positive or negative in reference to the grounded roll 74.
  • the electrode is maintained at a potential to attract the triboelectrically charged selenium particles while the heads will be attracted toward the grounded roll 74.
  • the plastic beads pass towards the grounded side of separator bar 76 while the selenium is attracted to the opposite side of the bar so as to isolate one material from the other.
  • Wiper arms 77 and 78, respectively, are biased against the charged electrode and the grounded roll so that any material adhering thereto will be cleaned from the roll.
  • line 90 conveys the beads from the separator to blast generator where they are reused in the stripping process. Over a period of time the plastic beads may become contaminated with metal or may become fractured through usage and, therefore, it may become desirous to recharge the system with new beads.
  • Line 90 which conveys the beads from the separator to the generator, is divided into two separate branches with one line supplying the blast generator and the other waste receptacle 96. To recharge the system, the used beads leaving electrostatic separator 70 are first conveyed to the waste receptacle while new beads are loaded directly into blast generator 80.
  • the utilization of the various electrostatic separating stages may be altered to best facilitate the triboelectric properties of the various material stripped.
  • FIG. 5 A second process for stripping selenium embodying the features of the present invention is shown schematically in FIG. 5. It is possible to strip a xerographic drum at a reduced rate by recharging the blast generator with a mixture of shot particles which are somewhat contaminated with selenium material. Utilization of this method results in an economic saving because the beads need only be electrostatically separated periodically rather than once during each processing cycle.
  • the xerographic drums are first stripped in blast cabinet 20 with the used bead and stripped selenium particles falling upon vibratory screen 55.
  • the larger particles of selenium removed during the stripping operation are retained upon the screen while the smaller beads and selenium particles are passed through the mesh.
  • the residue passing through the screen is then transported to a cyclone separator with the finer particles of selenium, fractured beads, and any dust which may have entered the system are separated from the whole beads and intermediate selenium particles.
  • the separated dust, selenium, and fractured bead particles are removed from the system and collected in dust collector 65.
  • the beads and selenium particles remaining after the cyclone separation are used to recharge blast generator 80 (solid path line) or are periodically processed through the electrostatic separator 70 (dotted path lines).
  • a process of removing and recovering a hard coating of selenium from a relatively soft support material including stripping the selenium coating by impacting the selenium with resilient beads having a lower modulus of elasticity than the modulus of elasticity of the support material,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Coating Apparatus (AREA)
US589099A 1966-10-24 1966-10-24 Metalworking Expired - Lifetime US3460296A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58909966A 1966-10-24 1966-10-24

Publications (1)

Publication Number Publication Date
US3460296A true US3460296A (en) 1969-08-12

Family

ID=24356586

Family Applications (1)

Application Number Title Priority Date Filing Date
US589099A Expired - Lifetime US3460296A (en) 1966-10-24 1966-10-24 Metalworking

Country Status (4)

Country Link
US (1) US3460296A (xx)
DE (1) DE1652264A1 (xx)
GB (1) GB1196684A (xx)
NL (1) NL6714325A (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001220A1 (en) * 1981-10-02 1983-04-14 Markku Juhani Fingerroos Equipment for the treatment of cylindrical hollow structures by means of blast cleaning
EP0306801A2 (de) * 1987-09-10 1989-03-15 Bayer Ag Verwendung wässriger Dispersionen für das Druckluftstrahlen
EP0335089A2 (de) * 1988-03-26 1989-10-04 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Entgraten kälteversprödbarer Formteilen
US4943368A (en) * 1988-11-15 1990-07-24 Pittsburgh Mineral & Environmental Technology, Inc. Nonmetallic abrasive blasting material recovery process including an electrostatic separation step
EP0430856A1 (en) * 1989-11-27 1991-06-05 United Technologies Corporation Liquid jet removal of plasma sprayed and sintered coatings
US5071541A (en) * 1988-09-30 1991-12-10 The Boeing Company Method and apparatus for sorting a mixture of particles
EP0523462A2 (de) * 1991-07-19 1993-01-20 Fried. Krupp AG Hoesch-Krupp Verfahren zum Entfernen von auf Rohren befindlichen Beschichtungen
US5352329A (en) * 1993-12-09 1994-10-04 Xerox Corporation Removing portions of imaging member layers from a substrate
US5378315A (en) * 1993-12-09 1995-01-03 Xerox Corporation Removing imaging member layers from a substrate
US6513024B1 (en) 1999-03-16 2003-01-28 Chou H. Li Self-optimization with interactions
US6625500B1 (en) 1999-03-16 2003-09-23 Chou H. Li Self-optimizing method and machine
CN102699823A (zh) * 2012-07-07 2012-10-03 钟汉良 薄型易碎板材精密喷砂加工机及加工方法
US8490237B2 (en) 2010-08-11 2013-07-23 Telebrands Corp. Combination sticky roller and brush

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712136B (zh) * 2019-10-12 2021-09-21 南京六合高新建设发展有限公司 一种可循环利用的喷丸设备
CN112338812A (zh) * 2020-10-30 2021-02-09 杭州绿鸿金属制品有限公司 一种管类机械加工用大尺寸管材表面除锈装置及其除锈方法
CN112338811A (zh) * 2020-10-30 2021-02-09 杭州绿鸿金属制品有限公司 一种管类机械加工用大尺寸管材表面除锈装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624988A (en) * 1950-02-01 1953-01-13 Wagner Brothers Inc Polishing or buffing composition and method of using the same
US2710286A (en) * 1953-02-25 1955-06-07 Rca Corp Method of removing and salvaging adherent materials
US3055150A (en) * 1959-07-20 1962-09-25 Elmer H Greenberg Metal-plate-treating method and apparatus
US3090166A (en) * 1959-02-17 1963-05-21 Bell Intercontinental Corp Polishing method and device
US3269066A (en) * 1963-01-09 1966-08-30 Wheelabrator Corp Method for production of abraded design on work surfaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624988A (en) * 1950-02-01 1953-01-13 Wagner Brothers Inc Polishing or buffing composition and method of using the same
US2710286A (en) * 1953-02-25 1955-06-07 Rca Corp Method of removing and salvaging adherent materials
US3090166A (en) * 1959-02-17 1963-05-21 Bell Intercontinental Corp Polishing method and device
US3055150A (en) * 1959-07-20 1962-09-25 Elmer H Greenberg Metal-plate-treating method and apparatus
US3269066A (en) * 1963-01-09 1966-08-30 Wheelabrator Corp Method for production of abraded design on work surfaces

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001220A1 (en) * 1981-10-02 1983-04-14 Markku Juhani Fingerroos Equipment for the treatment of cylindrical hollow structures by means of blast cleaning
EP0306801A2 (de) * 1987-09-10 1989-03-15 Bayer Ag Verwendung wässriger Dispersionen für das Druckluftstrahlen
EP0306801A3 (en) * 1987-09-10 1990-10-24 Bayer Ag Use of an aquous suspension in air jet blasting
EP0335089A2 (de) * 1988-03-26 1989-10-04 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Entgraten kälteversprödbarer Formteilen
EP0335089A3 (de) * 1988-03-26 1990-06-13 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Entgraten kälteversprödbarer Formteilen
US5071541A (en) * 1988-09-30 1991-12-10 The Boeing Company Method and apparatus for sorting a mixture of particles
US4943368A (en) * 1988-11-15 1990-07-24 Pittsburgh Mineral & Environmental Technology, Inc. Nonmetallic abrasive blasting material recovery process including an electrostatic separation step
EP0430856A1 (en) * 1989-11-27 1991-06-05 United Technologies Corporation Liquid jet removal of plasma sprayed and sintered coatings
US5167721A (en) * 1989-11-27 1992-12-01 United Technologies Corporation Liquid jet removal of plasma sprayed and sintered
USRE35611E (en) * 1989-11-27 1997-09-23 Waterjet Systems, Inc. Liquid jet removal of plasma sprayed and sintered coatings
EP0523462A3 (en) * 1991-07-19 1993-03-03 Hoesch Aktiengesellschaft Method to remove external coatings from pipelines
EP0523462A2 (de) * 1991-07-19 1993-01-20 Fried. Krupp AG Hoesch-Krupp Verfahren zum Entfernen von auf Rohren befindlichen Beschichtungen
US5352329A (en) * 1993-12-09 1994-10-04 Xerox Corporation Removing portions of imaging member layers from a substrate
US5378315A (en) * 1993-12-09 1995-01-03 Xerox Corporation Removing imaging member layers from a substrate
US6513024B1 (en) 1999-03-16 2003-01-28 Chou H. Li Self-optimization with interactions
US6625500B1 (en) 1999-03-16 2003-09-23 Chou H. Li Self-optimizing method and machine
US8490237B2 (en) 2010-08-11 2013-07-23 Telebrands Corp. Combination sticky roller and brush
US8490236B2 (en) 2010-08-11 2013-07-23 Telebrands Corp. Combination sticky roller and brush
US8590094B2 (en) 2010-08-11 2013-11-26 Telebrands Corp. Portable hair/lint roller
US8763190B2 (en) 2010-08-11 2014-07-01 Telebrands Corp. Portable hair/lint roller
CN102699823A (zh) * 2012-07-07 2012-10-03 钟汉良 薄型易碎板材精密喷砂加工机及加工方法

Also Published As

Publication number Publication date
NL6714325A (xx) 1968-04-25
GB1196684A (en) 1970-07-01
DE1652264A1 (de) 1971-03-25

Similar Documents

Publication Publication Date Title
US3460296A (en) Metalworking
CN102712017B (zh) 用于干式清洁的设备和方法
CA1112290A (en) Apparatus for cleaning photosensitive member
US2204588A (en) Apparatus for abrasively treating metal articles
US4052820A (en) Portable surface treating apparatus
US3475936A (en) Transport system
US4305797A (en) Material separation by dielectrophoresis
US5542543A (en) Electrostatic separation and classification apparatus
GB1437658A (en) Method and apparatus for blasting
US2993309A (en) Machine for the surface treatment of thin plastic films
JPH0615570A (ja) 平面研磨機
US2131767A (en) Apparatus for treating metal
US4523988A (en) Apparatus and method for producing virgin and/or reclaiming used abrasives
US2131769A (en) Apparatus for treating metal articles
EP0647489A1 (en) Device for cleaning adhering material off sand
US4319436A (en) Portable blasting device and sealing means
US5470271A (en) Flexible belt reclaiming
US3435566A (en) Method of deburring a flat workpiece
JP3088954B2 (ja) 原子炉用燃料ペレットの選別装置
US3127706A (en) Pipe cleaning apparatus
JP3288462B2 (ja) 除電式除塵装置
US2786635A (en) Apparatus for reclaiming rubber material
US3831748A (en) Trash separating apparatus
JP2889547B2 (ja) 表面付着物の回収処理装置及び方法
GB2121322A (en) Separating agricultural produce from other materials