GB2059804A - Comminuting machine - Google Patents
Comminuting machine Download PDFInfo
- Publication number
- GB2059804A GB2059804A GB8027906A GB8027906A GB2059804A GB 2059804 A GB2059804 A GB 2059804A GB 8027906 A GB8027906 A GB 8027906A GB 8027906 A GB8027906 A GB 8027906A GB 2059804 A GB2059804 A GB 2059804A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- support structure
- machine
- blades
- cleaning
- 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.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 48
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 7
- 239000011295 pitch Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
-
- 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
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
- B02C18/182—Disc-shaped knives
-
- 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
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
-
- 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
Abstract
A machine for the comminution of waste material comprises a pair of contra-rotating shafts (3) each provided with a plurality of cutting blades (12) in the form of toothed discs coaxially mounted on the shaft (3). The arrangement of the blades (12) along the shaft (3) is such that each of the blades (12) of one shaft (3) is interposed between two adjacent blades of the other shaft. Means are provided for preventing waste material from penetrating into the inter-blade spaces comprised between the cutting blades (12) of the same shaft (3). These means comprise for each shaft (3) a plurality of cleaning elements (16) each arranged in a respective inter-blade space on the side of the shaft (3) away from the other shaft (3). These cleaning elements (16) are supported on the support structure (18) of the machine in such a way that they can slide freely with respect to the support structure (18) in a direction parallel to the axes of the said shafts (3). <IMAGE>
Description
SPECIFICATION
Comminuting machine
The present invention relates to comminuting machines of the type comprising a support structure rotatably.mounting two parallel shafts, drive means arranged to drivingly rotate said shafts in opposite senses, a respective plurality of cutting blades mounted fast for rotation on each said shaft, each blade being in the form of a toothed disc coaxially mounted on its corresponding shaft for rotation between two adjacent blades mounted on the other said shaft, spacer rings co-axialiy arranged on each shaft in alternation with the cutting blades mounted thereon whereby adjacent cutting blades of the same shaft are separated by an inter-blade space of predetermined axial extent, and cleaning means for preventing material from penetrating into the said inter-blade spaces on the side of each shaft away from the other shaft.
In known comminuting machines of the aforesaid type, the cleaning means comprise a plurality of cleaning elements each of which is fixed in position relative to the support structure of the machine and is disposed in a respective one of the inter-blade spaces comprised between adjacent blades of the same shaft. The cleaning elements may all be supported by a single member secured to the support structure of the machine, or they may be secured to the said support structure independently of each other; as a further alternative, the cleaning elements may be supported, in groups or two or more, by support members which are secured to the support structure of the machine.
A machine of the type specified above is described and illustrated, for example, in U.S.
Patent No. 1,939,246 which discloses a machine for the comminution of paper. In this case, each of the cleaning elements is secured independently of the others to the support structure of the machine. The same Applicant has for some time produced a comminuting machine provided with a plurality of cleaning elements all supported by a single member, the resulting "comb", being secured to the support structure of the machine.
In machines of the type specified above, the assembly of the disc blades onto each shaft is achieved by placing the the various blades on the shaft with the tightening up the resultant assembly. Each shaft has a non-circular section, for example, hexagonal, and each blade has a central hole of corresponding shape whereby the blade is rendered fast for rotation with the said shaft.
It is clear that, due to the tolerances involved in the manufacture of the cutting blades and the spacer rings, it is not possible to accurately predict the precise position which will be assumed by each cutting blade relative to the support structure of the machine when assembly has been completed.
The result of this is that in machines of this type in which the cleaning elements are secured to the support structure of the machine, it is not possible to make these cleaning elements with a thickness, in the axial direction of the shafts, corresponding to the thickness of the spacer rings which separate the cutting blades from each other. In fact it is necessary to make each cleaning element with a somewhat smaller thickness than that of the spacer rings so as to allow for vaiations in the final position of the cutting blades due to the said manufacturing tolerances. In most cases, therefore, each cleaning element does not fully occupy the inter-blade space comprised between two adjacent blades carried on the same shaft, and as a result some material can still penetrate into this space when the machine is in operation.Furthermore, in the case where the cleaning elements are all supported by a single member secured to the support structure of the machine, it is necessary to make this member with a considerable degree of precision in order to ensure absolute constancy of the pitch between the cleaning elements. In the case where the cleaning elements are secured independently of each other to the support structure, it is necessary for the points of anchorage of the cleaning elements to this structure to be made with a considerable degree of precision in order to ensure the constancy of the pitch of the cleaning elements when assembly is completed.
The object of the present invention is to provide a comminuting machine of the type initially specified which enables the problems cited above to be avoided.
In order to achieve this object, the present invention provides a comminuting machine of the aforesaid type in which for each said shaft the said cleaning means comprises a plurality of cleaning elements each arranged on the side of the shaft away from the other shaft and each positioned in a respective one of said inter-blade spaces, each said cleaning element being supported by the support structure in a manner enabling said element to move freely with respect to the support structure in a direction parallel to the axes of the said shafts.
Due to this arrangement of the cleaning elements, during assembly of the cutting blades onto each shaft of the machine, each of the cleaning elements is free to move axially of the shaft so as to position itself in the inter-blade space comprised between two adjacent blades of that shaft whatever the final position assumed by these blades may be. As a result, the cleaning elements can be made with a thickness virtually identical to the thickness of the spacer rings which separate the cutting blades from each other. When assembly of the machine has been completed, each cleaning element will therefore extend completely across the corresponding interblade space so that it is practically impossible for material to penetrate into this space when the machine is in operation.Moreover, due to the fact that the cleaning elements extend completely across the inter-blade spaces, these cleaning elements may also be utilized as further cutting tools. Another advantage resulting from this arrangement is that the cleaning elements act as support members for the cutting blades in the case where, during operation of the machine, the material being processed causes forcing apart of the blades as it passes between them. The stressing of each cutting blade in this condition is therefore less severe than in prior art machines of the same type.
The use of cleaning elements which are free to move axially with respect to the support structure of the machine also results in greater versatility of the basic machine. Thus, for example, where it is desired to use the same machine both in a first processing phase with cutting blades of a-predetermined thickness and a predetermined pitch, and in a second processing phase with cutting blades of a different thickness and pitch, it is no longer necessary to provide two different "combs" corresponding to the two different blade pitches, as would be required in the prior art machines. In particular, the use of axiallyslidable cleaning elements is advantageous in the case where it is desired to assemble the cutting blades of each shaft in groups of different pitch.
A comminuting machine embodying the invention will now be particularly described, by way of example with reference to the accompanying diagrammatic drawings, in which:
Figure 1 is a partialiy sectioned plan view of the machine;
Figure 2 is a partially sectioned end elevation of the machine; and
Figure 3 is an exploded perspective view of a detail of the machine.
As shown in the drawings, the comminuting machine 1 comprises a support structure 2, and two parallel shafts 3 each rotatably supported at both ends by the support structure 2. The shafts 3 each have a cross-section of regular hexagonal form and are arranged with their axes lying in a common horizontal plane.
The machine 1 further comprises an hydraulic motor 4 arranged to drivingly rotate the sun wheel 5 of an epicyclic gear train 6.
In addition to the sun wheel 5, the gear train 6 includes a crown wheel 7 integral with the support structure 2, and planet wheels 8 mounted on a planet carrier 9 (one of the wheels 8 can be seen in Fig. 1). The planet carrier 9 is connected to a toothed wheel 10 splined to one end of one of the two shafts 3.
The toothed wheel 10 engages with a toothed wheel 11 of greater diameter which is splined onto the corresponding end of the other shaft 3. In this manner the hydraulic motor 4 is arranged to entrain in rotation the two parallel shafts 3 in directions opposite to each other and with different angular velocities.
Each shaft 3 is provided along its length both with a plurality of cutting blades 1 2 each in the form of a toothed disc, and with a plurality of spacer rings 1 3. The blades 12 and rings 1 3 are alternately arranged such that the neighbouring blades 1 2 are separated by an inter-blade space of an axial extent determined by the axial thickness of the spacer ring 1 3 situated between the blades. The blades 1 2 on each shaft 3 are arranged opposite respective ones of the spacer rings 13 of the other shaft 3.
Each blade 1 2 has a central hole 1 2a the shape of which corresponds to the cross sectional shape of each shaft 3. Thus, once assembled on the shaft 3, each blade 1 2 is fast for rotation with the shaft 3. The assem bly of cutting blades 1 2 and spacer rings 13 associated with each shaft 3 is axially tightened by means of ring nuts 14 provided at both ends of the shaft 3.
Each cutting blade 1 2 is provided with a tooth 1 2b (see Fig. 2) which sweeps a volume bounded in a plane perpendicular to the axis of the shaft 3 by a cylindrical surface indicated by the chain line 1 5 in Fig. 2.
Associated with each shaft 3 is a respective plurality of cleaning elements 16. Each element 1 6 is arranged on the side of its associated shaft 3 diametrically opposite the other shaft 3 and is positioned in the inter-blade space comprised between two adjacent blades 1 2. Each element 1 6 comprises a prismatic body which is of uniform thickness axially of the shaft 3, the form of the body considered in a plane transverse to the shaft 3 being tha- of a sector of a circular, radially-wic'e annulus whose centre of curvature substantially coincides with the axis of the corresponding shaft 3.Each element 1 6 has a radially-inner partcylindrical face 1 6a which follows the line of the radially-inner edge of said sector of an annulus and is arranged to rest on the external surface of the corresponding spacer ring 1 3 which separates the blades 1 2 between which the cleaning element 1 6 is interposed.
Each element 1 6 also has a radially-outer partcylindrical face 1 6b which follows the line of the radially-outer edge of said sector of an annulus and is in contact with a matching surface 1 7 of a side wall 1 8 of the support structure 2. The radially outer face 1 6b of each member 1 6 is provided at its upper and lower ends with respective projections 1 9 which extend radially from this face to engage on two corresponding support surfaces 20 forming part of the side wall 1 8.
Each element 1 5 is thus supported by the corresponding side wall 1 8 of the support structure 2 and by the corresponding spacer ring 1 3 in a manner enabling it to move freely both with respect to the spacer ring 13, and with respect to the support structure in a direction parallel to the axes of the shafts 3.
Each cleaning element 1 6 is therefore free to shift axially with. respect to the support structure during the assembly of the cutting blades 1 2 onto each shaft 3, whereby to position itself in the inter-blade space defined between two adjacent blades 1 2 independently of the final position assumed by these blades relative to the shaft 3. As a result, for the reasons previously stated, it becomes possible to make each element 1 6 with a thickness substantially coinciding with the thickness of the spacer rings 1 3. The elements 1 6 will therefore extend completely across the inter-blade in which they are situated so that penetration of material into these spaces is prevented when the machine is in operation.
The lower radially-extending face 1 Sc of each element 1 6 is arranged to provide a further cutting zone for material brought against it by the cutting blades 1 2 during operation of the machine.
As explained above, the cleaning elements 1 6 also act as support members for the cutting blades 1 2 in the event of the said blades being forced apart by waste material as it passes between them.
The use of cleaning elements of the type described above makes it possible to increase the versatility of the basic machine. Thus, for example, it now becomes much simpler to set up a comminuting machine which during successive operational phases uses cutting blades having different thickness and pitch, or to set up a machine in which groups of blades of different pitch are in simultaneous use.
Claims (8)
1. A machine for comminuting waste material, said machine comprising a support structure rotatably mounting two parallel shafts, drive means arranged to drivingly rotate said shafts in opposite senses, a respective plurality of cutting blades mounted fast for rotation on each said shaft, each blade being in the form of a toothed disc coaxially mounted on its corresponding shaft for rotation between two adjacent blades mounted on the other said shaft, spacer rings coaxially arranged on each shaft in alternation with the cutting blades mounted thereon whereby adjacent cutting blades of the same shaft are separated by an inter-blade space of predetermined axial extent, and cleaning means for preventing material from penetrating into the said inter-blade spaces on the side of each shaft away from the other shaft, said cleaning means comprising for each shaft a plurality of cleaning elements each arranged on the side of the shaft away from the other shaft and each positioned in a respective one of said inter-blade spaces, each said cleaning element being supported by the support structure in a manner enabling said element to move freely with respect to the support structure in a direction parallel to the axes of the said shafts.
2. A machine according to Claim 1, wherein the said cleaning elements also serve as cutting tools.
3. A machine according to Claim 1, wherein each cleaning element, in addition to being supported by said support structure, is also supported by the spacer ring which separates the blades bounding the inter-blade space in which the cleaning member is situated.
4. A machine according to Claim 3, wherein each cleaning element comprises a prismatic body which considered in a plane transverse to the shaft axes has the form of a sector of a circular annulus arranged with its centre of curvature substantially coincident with the axis of the shaft with which the cleaning element is associated, said prismatic body having: -a radially-inner part-cylindrical face which follows the line of the radially-inner edge of said sector of an annulus and is arranged to contact the outer surface of the spacer ring that separates the blades between which the cleaning element is interposed, and -a radially-outer part-cylindrical face which follows the line of the radially-outer edge of said sector of an annulus and is in contact with a matching support surface of the support structure.
5. A machine according to Claim 4, wherein the said radially outer face of each cleaning element is provided at its two circumferential extremities with respective radial projections which extend outwards from the said face and engage with corresponding support surfaces of the support structure.
6. A machine according to Claim 4 or
Claim 5, wherein one of the radially extending faces of each cleaning element is arranged to co-operate with the cutting blades to provide a further zone of cutting of waste material.
7. A machine according to any one of
Claims 4 to 6, wherein the prismatic body forming each cleaning element has a uniform thickness axially of said shafts.
8. A comminuting machine substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT69008/79A IT1119222B (en) | 1979-10-16 | 1979-10-16 | SHREDDING MACHINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2059804A true GB2059804A (en) | 1981-04-29 |
| GB2059804B GB2059804B (en) | 1984-06-20 |
Family
ID=11311144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8027906A Expired GB2059804B (en) | 1979-10-16 | 1980-08-28 | Comminuting machine |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH641977A5 (en) |
| DE (1) | DE3033752A1 (en) |
| FR (1) | FR2467633B1 (en) |
| GB (1) | GB2059804B (en) |
| IT (1) | IT1119222B (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432279A (en) * | 1982-09-24 | 1984-02-21 | Reynolds Metals Company | Can flattener |
| US4489897A (en) * | 1983-03-02 | 1984-12-25 | General Binding Corporation | Apparatus for shredding documents |
| EP0174148A2 (en) * | 1984-08-31 | 1986-03-12 | Mochizuki Precision Machine Industries Co. Ltd. | Cutting apparatus |
| DE3610539A1 (en) * | 1986-03-27 | 1987-10-01 | Hermann Schwelling | Stripping unit for the pair of cutting rollers of a document shredder |
| GB2201611A (en) * | 1987-03-04 | 1988-09-07 | Schleicher Co Feinwerktech | Cutting mechanism for devices for comminuting material |
| US4773603A (en) * | 1986-03-27 | 1988-09-27 | Hermann Schwelling | Cutting mechanism for document shredder |
| US5178336A (en) * | 1991-10-11 | 1993-01-12 | John W. Wagner | Machine for cutting disposable containers |
| US5295633A (en) * | 1992-01-13 | 1994-03-22 | Fellowes Manufacturing Company | Document shredding machine with stripper and cutting mechanism therefore |
| EP0602408A1 (en) * | 1992-12-17 | 1994-06-22 | Robert Bosch Gmbh | Shredder |
| US5362000A (en) * | 1992-10-27 | 1994-11-08 | Hermann Schwelling | Pre-comminuting and metering apparatus for paper shredders |
| EP0671214A1 (en) * | 1994-03-10 | 1995-09-13 | SATRIND S.r.l. | Shredding apparatus with rotating rollers equipped with non-perforated curved plates coaxial with the rollers |
| US5516050A (en) * | 1995-02-27 | 1996-05-14 | Basf Corporation | Industrial Rotary Shredder |
| GB2311026A (en) * | 1996-03-15 | 1997-09-17 | Milldale Ltd | Stripper device for shredding machines |
| FR2771657A1 (en) * | 1997-12-03 | 1999-06-04 | Cvp | Rotating cutting unit for waste grinding installations |
| US5954280A (en) * | 1998-05-12 | 1999-09-21 | Fellowes Manufacturing Company | Top blocker for a paper shredder |
| WO2002060588A1 (en) * | 2001-01-29 | 2002-08-08 | Terrence James Parke | Self cleaning shredding device having movable cleaning rings |
| US6484955B2 (en) * | 2001-03-27 | 2002-11-26 | Liang-Ching Hsu | Shredding machine |
| EP1749576A3 (en) * | 2005-08-05 | 2007-02-21 | Vecoplan Maschinenfabrik GmbH & Co. KG | Comminuting apparatus having a frequency controlled electric motor and an epicyclic gear mechanism |
| AU2002229399B2 (en) * | 2001-01-29 | 2007-11-08 | Bearcorp Pty Ltd | Self cleaning shredding device having movable cleaning rings |
| EP2078464A3 (en) * | 2008-01-11 | 2014-04-30 | International Tobacco Machinery Poland Sp. z o.o. | Assembly for perforating rod-shaped elements, particurarly cigarettes |
| IT201600110721A1 (en) * | 2016-11-03 | 2018-05-03 | Consiglio Per La Ricerca In Agricoltura E L’Analisi Dell’Economia Agraria | Machine for cutting leaves for feeding animals, in particular silkworms |
| CN111036363A (en) * | 2019-11-27 | 2020-04-21 | 林金雄 | Material crushing and screening device with material blocking protection function |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3112666A1 (en) * | 1981-03-31 | 1982-10-14 | Feinwerktechnik Schleicher & Co, 7778 Markdorf | SCRAPER IN THE DRAWING MACHINE OF A TORNING MACHINE FOR TEXT AND DATA CARRIERS |
| US4702422A (en) * | 1986-09-19 | 1987-10-27 | Disposable Waste Systems, Inc. | Solid waste comminutor with slotted slide rails and side rails for same |
| DE3927376A1 (en) * | 1989-08-19 | 1991-02-21 | Fritz Sachse Maschinen Gmbh | Security document shredding machine - has two rotors which rotate at widely different speeds and in opposite directions |
| DE3930041A1 (en) * | 1989-09-08 | 1991-03-21 | Gloria Werke Schulte H Kg | Shredding machine knife mechanism - has small and large discs in alternate pairs along parallel shafts |
| DE4024060A1 (en) * | 1990-07-28 | 1992-02-06 | Lescha Maschf Gmbh | HAECKSLER |
| DE4109467C2 (en) * | 1991-03-22 | 1997-03-27 | Schleicher & Co Int | Document shredder |
| DE4240953A1 (en) * | 1992-12-05 | 1994-06-09 | Helmut Zepf Medizintechnik Gmb | Cutting mechanism for grinding hospital and household waste - incorporates two cutting rollers fixed to and stabilised by suspension which also supports skimmer to guide ground material into outlet shaft |
| DE4444977C2 (en) * | 1994-12-16 | 1999-04-01 | Scheppach Maschf J | Shredding plant |
| US5636801A (en) | 1995-08-02 | 1997-06-10 | Fellowes Mfg. Co. | One piece molded stripper for shredders |
| US5655725A (en) | 1995-08-24 | 1997-08-12 | Fellowes Manufacturing Co. | Retaining plate for gearing |
| DE102006036145B4 (en) * | 2006-07-31 | 2014-02-13 | Martin Yale International Gmbh | Device for reducing the size or compression of hollow bodies made of deformable materials |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR45173E (en) * | 1934-07-02 | 1935-07-06 | Rotary chopper | |
| FR1507585A (en) * | 1967-01-06 | 1967-12-29 | Improvements to document destruction machines | |
| US4018392A (en) * | 1975-12-22 | 1977-04-19 | Wagner John W | Shredding machine |
| US4052013A (en) * | 1976-03-08 | 1977-10-04 | Georgia-Pacific Corporation | Apparatus for shredding rubber tires and other scrap materials |
| GB1558423A (en) * | 1978-03-03 | 1980-01-03 | Dresser Europe Sa | Shredding machine |
-
1979
- 1979-10-16 IT IT69008/79A patent/IT1119222B/en active
-
1980
- 1980-08-27 CH CH646380A patent/CH641977A5/en not_active IP Right Cessation
- 1980-08-28 GB GB8027906A patent/GB2059804B/en not_active Expired
- 1980-09-08 DE DE19803033752 patent/DE3033752A1/en not_active Withdrawn
- 1980-10-15 FR FR8022050A patent/FR2467633B1/en not_active Expired
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432279A (en) * | 1982-09-24 | 1984-02-21 | Reynolds Metals Company | Can flattener |
| US4489897A (en) * | 1983-03-02 | 1984-12-25 | General Binding Corporation | Apparatus for shredding documents |
| EP0174148A2 (en) * | 1984-08-31 | 1986-03-12 | Mochizuki Precision Machine Industries Co. Ltd. | Cutting apparatus |
| EP0174148A3 (en) * | 1984-08-31 | 1988-02-03 | Mochizuki Precision Machine Industries Co. Ltd. | Cutting apparatus |
| DE3610539A1 (en) * | 1986-03-27 | 1987-10-01 | Hermann Schwelling | Stripping unit for the pair of cutting rollers of a document shredder |
| US4773603A (en) * | 1986-03-27 | 1988-09-27 | Hermann Schwelling | Cutting mechanism for document shredder |
| GB2201611A (en) * | 1987-03-04 | 1988-09-07 | Schleicher Co Feinwerktech | Cutting mechanism for devices for comminuting material |
| GB2201611B (en) * | 1987-03-04 | 1991-07-10 | Schleicher Co Feinwerktech | Cutting mechanism for devices for comminuting material |
| US5178336A (en) * | 1991-10-11 | 1993-01-12 | John W. Wagner | Machine for cutting disposable containers |
| US5295633A (en) * | 1992-01-13 | 1994-03-22 | Fellowes Manufacturing Company | Document shredding machine with stripper and cutting mechanism therefore |
| US5362000A (en) * | 1992-10-27 | 1994-11-08 | Hermann Schwelling | Pre-comminuting and metering apparatus for paper shredders |
| EP0602408A1 (en) * | 1992-12-17 | 1994-06-22 | Robert Bosch Gmbh | Shredder |
| EP0671214A1 (en) * | 1994-03-10 | 1995-09-13 | SATRIND S.r.l. | Shredding apparatus with rotating rollers equipped with non-perforated curved plates coaxial with the rollers |
| US5609307A (en) * | 1994-03-10 | 1997-03-11 | Satrind S.R.L. | Shredding apparatus with rotating rollers equipped with non-perforated curved plates coaxial with the rollers |
| US5516050A (en) * | 1995-02-27 | 1996-05-14 | Basf Corporation | Industrial Rotary Shredder |
| GB2311026A (en) * | 1996-03-15 | 1997-09-17 | Milldale Ltd | Stripper device for shredding machines |
| FR2771657A1 (en) * | 1997-12-03 | 1999-06-04 | Cvp | Rotating cutting unit for waste grinding installations |
| US5954280A (en) * | 1998-05-12 | 1999-09-21 | Fellowes Manufacturing Company | Top blocker for a paper shredder |
| WO2002060588A1 (en) * | 2001-01-29 | 2002-08-08 | Terrence James Parke | Self cleaning shredding device having movable cleaning rings |
| AU2002229399B2 (en) * | 2001-01-29 | 2007-11-08 | Bearcorp Pty Ltd | Self cleaning shredding device having movable cleaning rings |
| US6484955B2 (en) * | 2001-03-27 | 2002-11-26 | Liang-Ching Hsu | Shredding machine |
| EP1749576A3 (en) * | 2005-08-05 | 2007-02-21 | Vecoplan Maschinenfabrik GmbH & Co. KG | Comminuting apparatus having a frequency controlled electric motor and an epicyclic gear mechanism |
| EP2078464A3 (en) * | 2008-01-11 | 2014-04-30 | International Tobacco Machinery Poland Sp. z o.o. | Assembly for perforating rod-shaped elements, particurarly cigarettes |
| IT201600110721A1 (en) * | 2016-11-03 | 2018-05-03 | Consiglio Per La Ricerca In Agricoltura E L’Analisi Dell’Economia Agraria | Machine for cutting leaves for feeding animals, in particular silkworms |
| CN111036363A (en) * | 2019-11-27 | 2020-04-21 | 林金雄 | Material crushing and screening device with material blocking protection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CH641977A5 (en) | 1984-03-30 |
| DE3033752A1 (en) | 1981-04-30 |
| FR2467633A1 (en) | 1981-04-30 |
| FR2467633B1 (en) | 1986-09-19 |
| GB2059804B (en) | 1984-06-20 |
| IT1119222B (en) | 1986-03-03 |
| IT7969008A0 (en) | 1979-10-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |