US3529777A - Process for granulating sheet-like material - Google Patents

Process for granulating sheet-like material Download PDF

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Publication number
US3529777A
US3529777A US3529777DA US3529777A US 3529777 A US3529777 A US 3529777A US 3529777D A US3529777D A US 3529777DA US 3529777 A US3529777 A US 3529777A
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United States
Prior art keywords
cutters
teeth
cutter
tooth
cutting
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Expired - Lifetime
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English (en)
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Marshall A Dodson
Henry J Flair
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Illinois Tool Works Inc
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Illinois Tool Works Inc
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • D21B1/10—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags by cutting actions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
    • B23D31/008—Cutting-up scrap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/906—Chip making
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4705—Plural separately mounted flying cutters

Definitions

  • a pair of meshing cutters used in the device comprise helical toothed members such as gears which have each had their tooth shapes modified from a standard form so as to exert a scissors-type cutting action on work material fed to them as a continuous web, as individual pieces, or a combination of the two.
  • This invention relates to cutting devices for reducing relatively large and unwieldy pieces or webs of material to a size which can be handled readily.
  • the invention particularly relates to a device for reducing a continuous web and/or cutouts of scrap material formed incident to an article forming operation to a size which can be easily handled and readily mixed with new material for reuse without the necessity for utilizing several handling and reduction steps.
  • devices of the hammer mill variety are capable of granulating material, they sulfer from the considerable disadvantage that the cutting operation produces an extremely high noise level due to the impact of the hammers on the material.
  • the devices are also somewhat inefiicient in theit capacity to handle material since there are generally only a few blades on a cutter. Because of the extremely high noise level common to prior art granulators as well as their relatively large size it has been commonplace to locate the granulator equipment in a remote location relative to the article forming equipment to reduce the noise level with respect to the ears of workers associated with the article forming equipment.
  • a further object of this invention is to provide a granulating method which can receive and readily dispose of material fed to it either continuously in the form of a web, in batches including several thicknesses of material, or in a combination of continuous and batch-fed material.
  • Another object of the invention is to provide a granulating method which can handle either brittle or stretchy materials.
  • Another object of the invention is to provide a granulating method which has cutter members which are readily manufacturable on conventional lead forming equipment.
  • a further object of the invention is to provide a granulator method having cutters which can easily cut the work placed between them without excessive loading or wear and whose cutting ability increases when plural layers of work are presented to them at one time.
  • An additional object of the invention is to provide a granulator method which is extremely compact, efficient, and inexpensive to produce and maintain.
  • the granulator device of the present invention which preferably comprises two sets of cutters which are arranged to cut material fed into them into diagonal strips as it passes through the first set of cutters and into generally diamond-shaped or square pieces as the diagonal strips pass through the sec ond set of cutters which have their cuting edges arranged at approximately right angles to the cuting edges of the first set of cutters.
  • Each of the sets of cutters is comprised of a pair of cutter members having a plurality of helically arranged cutter teeth having the same lead angle but of opposite hand.
  • the cutter members are preferably formed on lead cutting machines such as are commonly used to form gears or helical cutters. Hobbing and milling machines are examples of such machines. Where the cutters are formed on gear forming equipment they are given tooth shapes which differ considerably from the conventional involute tooth form.
  • the teeth on each cutter memher are preferably quite thin at their tips.
  • the teeth are mounted to be only in slight overlapping engagement and of a size that they constitute only a small portion of the tooth space.
  • the axes of the cutters are preferably mounted to provide profile contact at the tip of each gear but with only a slight degree of overlapping engagement of the teeth.
  • the overlapping engagement must be sufficient to keep the teeth in mesh and permit one cutter member to drive the other.
  • the overlap also permits the teeth to engage each other at a point spaced from a plane connecting their centers so that the teeth coact like a pair of scissors.
  • each pair of cutters coact in the fashion of a pair of scissors in that the mating teeth move continuously into sliding contact with each other along the entire length of a line defined by the intersection of their tips and one side edge as the cutters rotate.
  • the cutter teeth overlap each other over only a small portion of their length at any one time and are Withdrawn from engagement as soon as they have performed their cutting function.
  • the teeth of the cutters of the present invention may be quite easily sharpened by removing only a small amount of material from their outer diameters. However, sharpening is rarely necessary since the teeth have a very long life due to the fact that their extremely thin tips act to easily penetrate the material being cut and thus do not cause extensive radial loading of the teeth.
  • the teeth are merely in sliding engagement with each other such that the main tangential loading consists merely of the force exerted by the driving gear on the driven gear to cause it to rotate.
  • the driving force exerted by the driving teeth on the driven teeth is sufficient to maintain the cutting edges in contact for cutting fairly brittle materials like polystyrene plastic, it is sometimes desirable to apply a slight additional amount of tangential loading to the teeth to positively assure a cut on the first pass when cutting thin extremely elastic material such as polyethylene sheeting.
  • FIG. 1 is a perspective view of a device incorporating two cooperating pairs of the cutter members of the invention and showing the cutting of a sheet of material into little pieces;
  • FIG. 2 is a top view of cutter members similar to those shown in FIGS. 1 and 3 but having their helical teeth in a herringbone pattern;
  • FIG. 3 is a perspective view of a modified form of the device shown in FIG. 1 wherein only one set of cooperating cutter members is used;
  • FIG. 4 is an enlarged sectional view showing the relationship of a pair of coacting cutters relative the material being cut in a plane perpendicular to the axes of a pair of cutters;
  • FIG. 5 is an enlarged sectional view similar to FIG. 4 but showing the relationship of a pair of ordinary mating involute gears of the general type ordinarily produced by the tool used to produce the cutters of FIG. 4.
  • material to be granulated such as a web indicated generally at 10 is fed downwardly into the bite of intermeshing teeth 12 and 14 on an upper set of cutter members 16 and 18 respectively. Since the teeth 12 and 14 are arranged helically about the cutter members 16 and 18, they will progressively cut the material 10 into a plurality of parallel strips which will drop downwardly. The diagonal strips of material 10 will then enter the bite of a second lower set of cutter members 22 and 24 which have helical cutter teeth 26 and 28 respectively arranged at approximately right angles to the cutter teeth 12 and 14. Because the teeth 26 and 28 are at an angle to the teeth in the first of cutters, the parallel strips of material which leave the first set of cutters will be cut transversely and will emerge from the second set of cutters as little square or diamond-shaped chips 32.
  • FIG. 3 shows a modified form of an apparatus which is generally similar to the apparatus of FIG. 1 in that it utilizes a set of cooperating cutters members 36, 38 which may be identical to the cutter members 16, 18 or 22, 24 in a single pass through the cutters, a recirculating screen shown in FIG. 1. Inasmuch as material fed into the bite of cutters 36, 38 cannot be cut into small chips or squares 44 is placed around the cutter members in close proximity thereto.
  • the screen 44 which has perforations or holes 46 around its entire lower portion serves as a guide or restraining member for keeping pieces of cut material which are not small enough to be discharged through holes 46 in contact with cutter teeth 50, 52 so that they will be carried around the cutters and presented to the bite of the cutter as many times as might be necessary to cause them to be cut into a size sufiiciently small to be discharged through the holes in the screen.
  • the spacing of the screen 44 from the cutters 38, 36 by a support bar 54 to form material accepting throats 55, 55 is somewhat critical.
  • the throat 55 formed beween the cutters and screen cannot accept the large volumes of material cut by the cutters at their maximum feed rate and the material may back up and either reduce the cutting rate or act like brakes to slow or stop the cutters.
  • a portion of the material to be recirculated may tend to mat upon the screen 44 and block the discharge of small pieces of material through the holes 46.
  • the throats 55, 55 will not only pass the maximum output of the cutters 38, 36 but will insure that the material to be recirculated is held close enough to the cutter teeth 52, 50 so as to either be moved directly or indirectly by them.
  • a spacing of 0.125 in. has been found to be quite suitable for use with material of a thickness of about 0.081 in.
  • a pair of cover plates 56, 58 are mounted relative to the cutters.
  • the cover plates 56, 48 also serve an added function of tunnelling material fed to the device into the bite of the cutters.
  • the cover plates 56, 58 are especially useful for insuring continuous feeding of material through the apparatus when the material being cut is in the form of individual pieces fed in batches, as compared to continuous web material. Without some type of cover plates, such material, especially if it is slippery, may occasionally lie flat over the bite of the rolls and form a bridge which will hold and prevent the feeding of additional pieces of material.
  • the cover plates 56, 58 help prevent this bridging by causing the majority of material dropped into the device to slide toward the bite at an angle rather than dropping with its plane surface horizontal. Since a single pair of cutters (FIG. 4) will tend, due to the helical pattern of its teeth, to drive the recirculated material in auger fashion to one end of the cutters, a stream of compressed air from nozzles 59, 60 may be directed in the opposite direction between the cutters and the cover plates 56, 58 to redistribute the material and even out the cutting loads on the teeth. To avoid the use of air and achieve fairly even distribution, the cutters may be given a herringbone rather than a straight helical pattern as shown at 36', 38' in FIG. 2.
  • FIGS. 1 and 3 have omitted many details such as the frame, bearings, mounting devices and drive means. It should be noted though, that the principles of the invention demand that only one of the pairs of cutters in each cutter set be driven and for this reason the cutters must be accurately and rigidly mounted relative to each other. The mounting must permit the driving cutter to always maintain driving contact with the driven cutter even though the cutter teeth overlap but a very slight amount.
  • each cooperating set of cutters is not critical as long as cooperating teeth move into initial contact with each other along their lead lines at the intersection between their outer diameters and tooth profiles so as to provide a shearing action which is maintained continuously as new portions along the length of the tooth are brought into contact during rotation of the cutters.
  • FIG. 5 a showing of the meshing relationship of ordinary gear teeth is set forth in FIG. 5.
  • a tooth 62 of a driving gear 64 enters engagement with a tooth 66 of a driven gear 68 at a point 70 to its involute surface 72.
  • the involute surface 72 of a tooth 62 then remains in sliding contact with the involute surface 74 on tooth 66 until the teeth move out of contact.
  • the severed material would most likely be jammed into the tooth space 76 as tooth 66 moves further and further into the tooth space.
  • the jammed material would almost certainly remain in the tooth space and would build up until the gears 68 and 64 were forced apart and their cutting contact lost.
  • the cutters 16, 18 of the present invention are formed with a tooth shape quite different from the ordinar gear teeth of FIG. 5 so that their teeth 12, 14 respectively will shear the work material continuously at all times during their rotation and will move the work at their own rate of rotation. This is quite in contrast to a hammer mill where there are only two or three cutters and the cutting action is one of chopping or punching.
  • the desired cutting action can be achieved by forming the cooperating cutters in a variety of ways and with varying shapes.
  • the cutters can be formed on any type of lead forming equipment which will produce helical gears or cutters.
  • the particular shape shown in FIG. 4 can be produced with a standard hob by using over and undersized blanks.
  • the cooperating cutters 16, 18 must have the same helical lead so that one cutter can drive the other and so that successive points along the line 72 on which the tooth form intersects the outer diameter on any tooth 12 will engage successive points on a similar line 74 on its mating tooth 14 as the cutters rotate and for the entire length of each tooth along the cutter body.
  • the shape of the teeth must also be such that at the point of cutting, the cutting edges of the teeth will be moving past each other in a generally radial direction. Such a cutting action means that the teeth 14 need only exert the relatively small force on the work material which is necessary to shear it as compared to punching it or crushing it.
  • the teeth may be made quite thin at their tips. As the tips are made thinner, their ability to penetrate the work increases and the cutting forces are reduced still further.
  • the theoretical limit on the thinness of the tips of the teeth is controlled generally by the strength required to permit the driving teeth to drive the driven teeth.
  • a further limitation on tip thickness can be introduced by the fact that the profiles of the teeth should be relieved back of their tips to insure that the respective teeth can only engage on their leading edges. Such relief also reduces the possibility of previously cut work material getting between the teeth as they overlap after cutting in the region 78 and forcing the succeeding teeth out of engagement.
  • the teeth might have to be formed with an undercut back of the tip which would weaken the tip.
  • thinner teeth perform more efficiently since they penetrate material with less effort than thicker teeth, it is possible for the width of the tooth at its maximum depth of penetration of a tooth space of a cooperating tooth to have a width as great as 40 percent of the tooth to tooth distance as measured on a circle through the teeth at the point of maximum penetration.
  • this Width figure would be about 15 percent as compared to a width of about 50 .percent for a conventional gear tooth 62 as shown in FIG. 5.
  • cutters of the present invention are mounted so that they have a limited amount of overlap. Some overlap is desired to permit cutter 18 to drive cutter 16 and to insure that the cutting edges 74, 72 will slide over each other to shear the work material. However, the overlap should be limited so that the tooth spaces 82, 84 will be kept relatively open after cutting to permit the cut pieces 10a, 10b and 10c of the material to assume the approximate positions shown in FIG. 4 wherein they can freely exit from the teeth and not become jammed in the tooth spaces 82, 84. A penetration of the teeth of one cutter into the tooth spaces of a mating cutter of about 2535% has been found to give good results.
  • the driving force of cutter 18 on cutter 16 without some supplemental drag force added to cutter 16 may be insuflicient to prevent the material from moving parallel to the sides of the teeth at points 72, 74, and being corrugated and carried around the cutters rather than cut and released.
  • cutter members having the requirements set forth herein can be made by many processes, the particular properties of the cutters shown in FIG. 4 will be described.
  • the process used to make the cutters was one of bobbing an oversized and an undersized blank with a single hob brought into the work to a point just short of topping (touching the root of the hob to the work).
  • topping touching the root of the hob to the work.
  • the table below includes data relating to such a gear also.
  • a 12 pitch cutter will provide a chip about A1 inch wide and is quite suitable for thin sheet material.
  • a lower pitch cutter is preferred for its extra strength.
  • the particles produced with a low pitch cutter are much larger than with a cutter having a higher pitch, they can be recirculated to any size desired by use of an appropriate screen.
  • a process for granulating sheet-like material into small particles comprising the steps of: presenting a sheet of material to the bite of a pair of rotating, meshing, helically toothed cutter members, one of which drives the other; shearing said material continuously and simultaneously along a plurality of spaced parallel lines at an angle to its direction of movement into the bite of the cutter members to form it into a plurality of elongated strips; subsequently directing said sheared elongated strips into the bite of a pair of rotating, meshing, helically toothed cutter members, one of which drives the other; and shearing said plurality of elongated strips transversely.
  • the pair of cutter elements to which the strips are subsequently directed comprise an additional pair of cutter members having helical teeth arranged to shear material generally at right angles to the angle of shear produced by the helical teeth of the pair of cutter members to which the work is initially presented, mounting said additional pair of cutters immediately adjacent to and underneath the pair of cutter members to which the work is initially presented, whereby said plurality of elongated strips of material may freely fall into the bite of said additional pair of cutter members.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US3529777D 1968-04-29 1968-04-29 Process for granulating sheet-like material Expired - Lifetime US3529777A (en)

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US72483368A 1968-04-29 1968-04-29

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US (1) US3529777A (xx)
CH (1) CH506329A (xx)
DE (1) DE1921316A1 (xx)
FR (1) FR2007173B1 (xx)
GB (1) GB1219717A (xx)
NL (1) NL6906385A (xx)
SE (1) SE351137B (xx)

Cited By (12)

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US3862721A (en) * 1973-02-07 1975-01-28 Illinois Tool Works Material grinding mechanism
US3894697A (en) * 1974-04-19 1975-07-15 Pitney Bowes Inc Paper shredder
US4776375A (en) * 1986-10-14 1988-10-11 Stanley Arasmith Winged cutting knife for producing wood chips or flakes
US4776269A (en) * 1986-11-17 1988-10-11 Exxon Chemical Patents Inc. Method of agglomerating and dewatering polymeric materials
US20050029377A1 (en) * 2001-12-26 2005-02-10 Castronovo Charles A. Zero-clearance cutting systems
US20070001045A1 (en) * 2005-06-30 2007-01-04 Lucent Technologies Inc. Continuous flow micro-crusher
WO2008086975A1 (en) * 2007-01-16 2008-07-24 Basf Se Production of superabsorbent polymers on a continuous belt reactor
US20100181405A1 (en) * 2009-01-05 2010-07-22 Royal Appliance Mfg. Co.D/B/A Tti Floor Care North America Blade assembly for shredders of sheet-like material
US9463465B2 (en) 2012-09-06 2016-10-11 Charles A. Castronovo Compact high-security destruction machine
US20190091697A1 (en) * 2017-09-25 2019-03-28 Saint-Fun International Ltd. Structure of lottery ticket destruction apparatus
CN111826982A (zh) * 2019-12-16 2020-10-27 苏州创之杰环保设备工程有限公司 一种废纸再生环保设备
US11027286B2 (en) * 2017-09-25 2021-06-08 Saint-Fun International Co., Ltd. Lottery ticket destroying device

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DE3231341A1 (de) * 1982-08-24 1984-03-01 Condux-Werk Herbert A. Merges KG, 6450 Hanau Vorrichtung zum zerkleinern von abfall
DE3412020A1 (de) * 1984-03-31 1985-10-03 Adolf 7460 Balingen Ehinger jun. Zerkleinerungsvorrichtung fuer folienartige informationstraeger
CH678927A5 (xx) * 1988-04-13 1991-11-29 Duesterloh Gmbh
DE3840598A1 (de) * 1988-12-02 1990-06-07 Bwg Bergwerk Walzwerk Vorrichtung zum zerteilen von bandstreifen, insbesondere von duennen und duennsten besaeumstreifen
GB2238965A (en) * 1989-12-16 1991-06-19 Lee King Lung Chipper for scrap plastic
DE19601594C2 (de) * 1996-01-18 1998-07-23 Fritsch Gmbh Verfahren und Vorrichtung zum Zerkleinern von Materialien, insbesondere zur Probenvorbereitung für Analysen
DE10120765A1 (de) * 2001-04-27 2002-10-31 Krupp Foerdertechnik Gmbh Mehrwalzenbrecher
DE102008006823A1 (de) 2008-01-31 2009-08-06 Mws Schneidwerkzeuge Gmbh & Co. Kg Zerkleinerungsvorrichtung
USD958879S1 (en) * 2020-02-27 2022-07-26 Jiunchen Technology Co., Ltd. Holder for roller paper cutter
USD950641S1 (en) * 2020-02-27 2022-05-03 Jiunchen Technology Co., Ltd. Holder for roller paper cutter
CN111632731B (zh) * 2020-06-08 2021-07-20 新乡医学院第一附属医院 一种中药材智能分级处理系统

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US847371A (en) * 1902-02-17 1907-03-19 W M Hanes Apparatus for converting feathers into down.
US1547112A (en) * 1922-05-26 1925-07-21 Joseph C Flowers Scrap-shearing attachment
GB812759A (en) * 1956-05-07 1959-04-29 Ici Ltd Improved process and apparatus for comminuting solid synthetic resinous materials

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US847371A (en) * 1902-02-17 1907-03-19 W M Hanes Apparatus for converting feathers into down.
US1547112A (en) * 1922-05-26 1925-07-21 Joseph C Flowers Scrap-shearing attachment
GB812759A (en) * 1956-05-07 1959-04-29 Ici Ltd Improved process and apparatus for comminuting solid synthetic resinous materials

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862721A (en) * 1973-02-07 1975-01-28 Illinois Tool Works Material grinding mechanism
US3894697A (en) * 1974-04-19 1975-07-15 Pitney Bowes Inc Paper shredder
US4776375A (en) * 1986-10-14 1988-10-11 Stanley Arasmith Winged cutting knife for producing wood chips or flakes
US4776269A (en) * 1986-11-17 1988-10-11 Exxon Chemical Patents Inc. Method of agglomerating and dewatering polymeric materials
US20070164142A1 (en) * 2001-12-26 2007-07-19 Castronovo Charles A Destruction Method With 45 Degree Feeding
US20100019073A1 (en) * 2001-12-26 2010-01-28 Castronovo Charles A Destroying Paper Into High Security Pieces, Powderizing Methods, and Other High-Security Destruction
US7090156B2 (en) * 2001-12-26 2006-08-15 Castronovo Charles A Destroying planar material
US7100852B2 (en) * 2001-12-26 2006-09-05 Castronovo Charles A Helical cutting
US20060208117A1 (en) * 2001-12-26 2006-09-21 Castronovo Charles A Destroying planar material into high security pieces
US20060249607A1 (en) * 2001-12-26 2006-11-09 Castronovo Charles A Helical cutting
US8596564B2 (en) 2001-12-26 2013-12-03 Charles A. Castronovo Destroying paper into high security pieces, powderizing methods, and other high-security destruction
US7240864B2 (en) * 2001-12-26 2007-07-10 Castronovo Charles A Helical cutting
US20050029377A1 (en) * 2001-12-26 2005-02-10 Castronovo Charles A. Zero-clearance cutting systems
US7334747B2 (en) 2001-12-26 2008-02-26 Castronovo Charles A Destroying planar material into high security pieces
US7357340B2 (en) 2001-12-26 2008-04-15 Castronovo Charles A Destruction method with 45 degree feeding
US20050040268A1 (en) * 2001-12-26 2005-02-24 Castronovo Charles A. Zero-clearance cutting systems
US7448562B2 (en) 2001-12-26 2008-11-11 Castronovo Charles A High-security destruction including sacrificial cutting followed by non-sacrificial cutting
US8356764B2 (en) * 2005-06-30 2013-01-22 Alcatel Lucent Continuous flow micro-crusher
US20070001045A1 (en) * 2005-06-30 2007-01-04 Lucent Technologies Inc. Continuous flow micro-crusher
US20100083802A1 (en) * 2007-01-16 2010-04-08 Basf Se Production of Superabsorbent Polymers on a Continuous Belt Reactor
WO2008086975A1 (en) * 2007-01-16 2008-07-24 Basf Se Production of superabsorbent polymers on a continuous belt reactor
US9914230B2 (en) 2007-01-16 2018-03-13 Basf Se Production of superabsorbent polymers on a continuous belt reactor
US20100181405A1 (en) * 2009-01-05 2010-07-22 Royal Appliance Mfg. Co.D/B/A Tti Floor Care North America Blade assembly for shredders of sheet-like material
US9463465B2 (en) 2012-09-06 2016-10-11 Charles A. Castronovo Compact high-security destruction machine
US20190091697A1 (en) * 2017-09-25 2019-03-28 Saint-Fun International Ltd. Structure of lottery ticket destruction apparatus
US11027286B2 (en) * 2017-09-25 2021-06-08 Saint-Fun International Co., Ltd. Lottery ticket destroying device
CN111826982A (zh) * 2019-12-16 2020-10-27 苏州创之杰环保设备工程有限公司 一种废纸再生环保设备

Also Published As

Publication number Publication date
FR2007173A1 (xx) 1970-01-02
NL6906385A (xx) 1969-10-31
FR2007173B1 (xx) 1974-06-14
GB1219717A (en) 1971-01-20
DE1921316A1 (de) 1970-09-03
CH506329A (fr) 1971-04-30
SE351137B (xx) 1972-11-20

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