US3903769A - Means and method of slotting strip metal - Google Patents

Means and method of slotting strip metal Download PDF

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Publication number
US3903769A
US3903769A US378833A US37883373A US3903769A US 3903769 A US3903769 A US 3903769A US 378833 A US378833 A US 378833A US 37883373 A US37883373 A US 37883373A US 3903769 A US3903769 A US 3903769A
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United States
Prior art keywords
strip material
rollers
strip
slots
slotting
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Expired - Lifetime
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US378833A
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English (en)
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Harold Rex Jury
Ronald Mckenzie Howells
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Comalco J&S Pty Ltd
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Comalco J&S Pty Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • B21D47/02—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars by expanding
    • 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
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/02—Shearing machines or shearing devices cutting by rotary discs having both a fixed shearing blade and a rotary shearing disc
    • 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
    • Y10T83/04—Processes
    • Y10T83/0515—During movement of work past flying cutter
    • 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
    • Y10T83/4737—With tool speed regulator
    • 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
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4798—Segmented disc slitting or slotting tool
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9408—Spaced cut forming tool

Definitions

  • ABSTRACT A means for and a method of slotting strip metal prior to drawing the edge portions of the metal apart to form a truss or mesh panel, which comprises driving the strip in the direction of its longitudinal axis past a series of co-axial slotting rollers and simultaneously driving those rollers to cause projections thereon to shear slugs from the strip so as to form slots therein, the simultaneous driving of the strip and driving of the slotting rollers achieving a out having a smooth surface which reduces stress concentration in the metal as it is expanded.
  • 885548 knife edges are provided on opposite edges of rotary shears so that each knife provides simultaneously two slits in the sheet operated on thereby.
  • the amount of force required to effect slitting of sheet material is very small compared with the amount of force required to effect the formation of slots in strip material of the same thickness. If for example the knives described in the said United States patent were utilised as slotting rollers, then the rollers would not be suitable for transporting the material to be slit through the cutting zone, and the material would be damaged by the roll punches.
  • the main object of this invention is to provide a means for piercing longitudinally extending slots wherein the strip material in which these slots are to be formed is not seriously damaged by the slotting rollers.
  • a further object is to provide means whereby the slot length can be varied slightly without changing the slotting rollers.
  • a still further object is to provide a means and method whereby slots formed in strip material will have cleanly cut ends which can for example be of arcuate shape, so that development of stress concentration zones is greatly reduced as the material is formed into an expanded metal member. This is of great importance if the overall length of the strip material is not to be reduced as the expansion takes place, and the expansion is accommodated by stretching of the metal between adjacent slots.
  • a strip material having a constant cross-sectional shape and constituting a workpiece is transported through a cutting zone between back-up means and a plurality of slotting rollers each of which has a radial projection extending around it for part but not all of its circumference, and at the same time the slotting rollers are driven at a speed which is adjusted to be synchronized with the speed of the transporting means which transport the strip past the rollers.
  • the means of this invention for the forming of longitudinally extending slots in strip material having a constant cross-sectional shape comprise a frame, a pair of aligned bearings carried by the frame, a series of co-axial slotting rollers positioned between the bearings and rotationally supported thereby, each of the slotting rollers having at least one radial projection which extends around it for part but not all of its circumference, back-up means spaced from the rollers but being adjacent thereto so as to define with the rollers a cutting zone, transport means carried by the frame, drive means coupled to the rollers for rotational driving thereof, and further drive means coupled to the transport means for the driving thereof in a direction at right angles to the roller axis, so constructed and arranged that a said strip of material when supported on the back-up means is driven by the transport means through the cutting zone while simultaneously the slotting rollers are driven rotationally, and the projections on the slotting rollers shear slugs from the strip so as to form said slots.
  • the method of the invention may be defined as a method of forming longitudinally extending slots in strip material having a constant cross-sectional shape, comprising driving the strip in the direction of its longitudinal axis and at right angles to the axis of a series of co-axial slotting rollers and through a cutting zone existing between the rollers and back-up means, each of said slotting rollers having at least one radial projection extending around it for part but not all of its circumference. and simultaneously driving the slotting rollers r0- tationally, thereby causing said projections to shear slugs from the strip material so as to form slots in the strip material.
  • the ends of the projections are curved so that the slots have curved ends, and control means are interposed between the respective drive means of the transport means and of the slotting rollers so that the speeds may be adjusted. If the transport means is adjusted so that it moves the strip workpiece at a higher speed than it would be otherwise moved by the rollers. then the ends of the slot will be found to be cleanly severed with a minimum of drag of material, so that development of stress concentration is reduced.
  • FIG. 1 is a diagrammatic representation illustrating the means for the slotting of strip material, and showing in diagrammatic form the slotting rollers. the back-up means and the transport means,
  • FIG. 2 is an enlarged cross-section showing the slotting rollers and the back-up means.
  • FIG. 3 is a fragmentary plan illustrating the machine at the location of the cutting zone
  • FIG. 4 is an exploded perspective view which illustrates three elements of a series of slotting rollers. namely a slotting roller, a spacer, and a stripper plate,
  • FIG. 5 is a longitudinal section through a series of slotting rollers carried on a shaft arranged to be supported between a pair of spindles on the machine,
  • FIG. 6 is an enlarged section showing the cutting zone and the relationship between the slotted rollers and a back-up roller
  • FIG. 7 is an enlarged side elevation of a slotting roller.
  • FIG. 8 is a half section taken on line 8-8 of FIG. 7,
  • FIG. 9 is a longitudinal section through a backup roller.
  • FIG. 10 is a partly diagrammatic view of a hold down roller (when used).
  • FIG. 11 is a perspective view of an auxiliary table (when used).
  • FIG. 12 is a diagrammatic representation showing the control means used for effecting drive to the slotting rollers and to the transport means.
  • the means for forming longitudinally extending slots comprises a machine having an in-feed roll case 21 and an out-feed roll case 22.
  • Each roll case 21 and 22 is adjustable for height by means of jacks 23 (FIG. 2) each jack 23 having a threaded member 24 which threadably engages a frame 25.
  • jacks 23 FIG. 2
  • each jack 23 having a threaded member 24 which threadably engages a frame 25.
  • only the adjacent ends of the respective roll cases 21 and 22 are adjustable for height, since the amount of adjustment required is relatively small.
  • the other ends are provided with hinge support means (not shown).
  • the in-feed roll case 21 is provided with a plurality of rollers 28 each carried on a respective shaft 29, the shafts being journalled in bearings 30.
  • the rollers are spaced axially on respective shafts 29, and between the rollers there is positioned a transport chain 31 having dogs 32 thereon.
  • the arrangement is such that a dog 32 engages against an end of a strip workpiece 33 as shown in FIG. 2 for driving the workpiece 33 through a cutting zone designated 34 and which exists between a back-up roller 35 and a series of slotting rollers 36.
  • On the output side of the cutting zone 34 there is also provided a hold down roller 37 which assists in reducing distortion of the workpiece after it has been cut.
  • Each slotting roller 36 is provided with a central opening 41 which engages over a shaft 42 and is keyed thereto by means of a key 43.
  • Each roller is also provided with six bolt holes 44 which contain bolts 45, and by this means it is possible to build up a stack of slotting rollers 36.
  • Each slotting roller 36 is provided with a pair of radial projections 46 which are spaced however by recessed portions designated 47. There is at least one radial projection 46, the number being determined by the length and pitch of the slots required in the workpiece strip 33.
  • each spacer 49 Between adjacent rollers 36 are positioned respective spacers 49, and surrounding each spacer 49 is a stripper plate 50, the function of the stripper plate 50 being to assist in avoiding distortion of the workpiece as it is cut, the stripper plates 50 lightly bearing against the upper surfaces of the respective beads on the strip material workpiece 33, which are designated 51 in FIG. 9. Further to assist in avoiding distortion, the outer peripheries of the radial projections 46 are knurled as shown in FIG. 4. This latter feature is an optional feature which in some cases is not used.
  • the bolts 45 bear against the end plates 53 (FIG. 5), and the end plates themselves are contained between annular packers 54 which surround the shaft 42 and at one end bear against a shoulder 55 and at the other end are retained by means of a spindle nut 56, the ends of the shaft 42 containing respective recesses 58 and 59, in both cases the recesses having tapered walls, and the recess 59 being intersected by a transverse slot 60.
  • the shaft 42 may be supported between a driven spindle at one end and an idling spindle at the other, while the stripper plates on the shaft 42 constitute a single assembly as shown in FIG. 5, enabling quick change over of tooling if the slot configuration is to be varied.
  • the tooling is attached to the machine in much the same way as a milling cutter is attached to a milling machine.
  • the shaft may have projections, and the spindles may be provided with recesses).
  • FIG. 6 shows the detail of operation of the slotting rollers 36. It will be noted that the axis of the back-up roller 35 was displaced towards the input side of the plane which is normal to the longitudinal axis of the strip workpiece 33.
  • the centre of the cutting zone 34 is essentially upstream" of the said plane, and is designated 66 in FIG. 6.
  • the cutting zone 34 is herein defined as being that portion of the web which is undergoing a shearing action upon rotation of the rollers 36.
  • the pitch cutting speed of each roller is defined herein as the lineal speed of that portion of the roller which is tangential to the mid-plane of the workpiece.
  • the ends of the radial projections 46 terminate in radially extending curved surfaces 67, and the side faces of the projections 46 are undercut to provide a rake or cutting clearance 68 as shown in FIG. 8. This reduces drag on the edges of the metal as shearing takes place in the workpiece.
  • FIG. 9 illustrates the cross-sectional shape of the back-up roller 35.
  • the back-up roller 35 comprises a plurality of annular members 75 carried on a shaft 76, the shaft 76 being of similar configuration to the shaft 42, again being provided with a shoulder 77 at one end,
  • FIG. illustrates one simple mechanism wherein an air cylinder 84 is coupled to an arm 85 which is pivoted to a standard 86 upstanding from the frame 25, the coupling being effected by means of a bell crank shaped lever 87 and a coupling link 88.
  • the standard 86 is provided with slots 89 which support a block 90 which in turn rotationally support a shaft 91, the shaft 91 having secured to it the bell crank levers 87.
  • the block 90 may be positioned in an upper position for high flanges or beads or in a lower position for low flanges or beads.
  • the slots 93 provide adjustment means for the pin 94 about which the arm 85 piv- OIS.
  • the workpiece is conveniently positioned on a table designated 96 in FIG. 11, the table 96 having a number of upstanding parallel spaced flanges 97 to support the workpiece between the slotting rollers 36, while the lower or underface of the table is provided with a chain 98 secured thereto and arranged to function as a rack, the chain 98 being identical in size and shape to the transport chain 31.
  • the sprocket 99 which drives the chain 31 will also drive the chain 98 and move the table 96 beneath the slotting rollers 36.
  • the table 96 becomes the transport means for transporting the workpiece beneath the slotting rollers.
  • the workpiece is retained by means of a stop bar 100 secured to the upper surface of the table 96.
  • FIG. 12 illustrates diagrammatically the drive means, wherein an electric motor 105 drives a pump 106 which draws oil from a reservoir 107, and drives the oil at pressure through a control valve 108, in turn driving an hydraulic motor 109 which effects drive to the shaft 42 by means of a drive chain 110.
  • the shaft 42 is coupled through a variable ratio drive designated 112 to one of a pair of tacho-generators 113, the tachogenerators controlling a direct current motor 114 through a direct current feed back control module 115 which controls speed of the motor 114 which has the second tacho-generator 113 coupled thereto.
  • the motor 114 drives the back-up roller 35 through a chain drive 116, and drives the sprocket 99 of the transport chain 31 through an electric clutch designated 117 in FIG. 12.
  • the tacho-generators 113 are generators sold under the registered trade mark Morse as an MK series, Morse being a registered trade mark of which Borg Warner International Corporation of Chicago Ill. U.S.A. is a registered user in the Commonwealth of Australia.
  • the tacho-generator item number is SPY, and it is coupled through an MK control designated number MK-2000, driving a horse power motor identified as an MK D.C. motor, part number 2000 DP230, or alternatively 2000 TE 230. All said products are arranged to interface with one another, all are produced by the Borg Warner lnternational Corporation, and all are sold under the registered trade mark Morse.
  • the machine is operated by firstly inserting a matched pair of tools, namely an assembly including a series of slotting rollers 36 arranged on a shaft 42, and a corresponding series of annular members arranged on a shaft 76. These are arranged to be driven in their respective positions on the machine, respectively by the motors 109 and 114.
  • the control 115 is adjusted so that the speed of the transport chain 31 (or alternatively of the table 96) is the same as the pitch cutting speed of the rollers 36, or slightly greater.
  • the degree of difference is adjustable by the control 115, and the operator exercises his skill in adjusting the diiference (if any). Slot length and quality of cut can be controlled by varying the speed of the motor 114.
  • a workpiece is either secured to the table 96 (if this is to be used) or alternatively is positioned over the chain 31 so that its end will be engaged by the dog 32.
  • An impulse is received from a separate sensing means, and this impulse energises the electric clutch 117, the electric clutch 117 being arranged to remain energised until the workpiece has completed its traverse through the cutting zone 34.
  • the sensing means is a magnet coupled to the shaft 42 and a proximity switch operated thereby.
  • This is not illustrated, and alternative sensing means may be used in lieu thereof.
  • the sensing switch is fully adjustable to provide means for compensating for starting inertia which varies with workpieces having different weights.
  • the instant of energising the clutch 117 determines the relationship between the slots and the end of the workpiece.
  • the mechanism for achieving this interlock is in accordance with prior art and forms no part of this invention.
  • cross-sectional configuration of the workpiece can vary considerably from that which is shown in FIG. 9, but in all cases it will be seen that beads 51 may be utilised to avoid the need for female dies when slugs are to be removed from the workpiece web so as to form the slots therein.
  • the feed chain and the back-up roller both imparted drive to the workpiece.
  • both these drives it is not always necessary to utilise both these drives, and either one may be used as the transport means in instances wherein the workpiece does not impart heavy cutting loads on the slotting rollers.
  • both the workpiece and the slotting rollers are driven.
  • a method of forming longitudinally extending slots in a non-flexible strip material having a constant crosssectional shape, the slotted strip material to be expanded by drawing edges thereof apart, comprising:
  • each of said slotting rollers having at least one radial projection extending around it for part but not all of its circumference and terminating in curved surfaces which extend in radial directions,
  • Means for forming longitudinally extending slots in a non-flexible strip material having a constant crosssectional shape, the slotted strip material to be expanded by drawing edges thereof apart comprising a frame, a series of co-axial slotting rollers rotatably supported by the frame, each of said slotting rollers having at least one radial projection extending around it for part but not all of its circumference and terminating at its ends in curved surfaces which extend in radial directions, back-up means spaced from the rollers but being adjacent thereto so as to define with the rollers a cutting zone, transport means carried by the frame, drive means coupled to the rollers for rotational driving thereof, and further drive means coupled to the transport means for the driving thereof at a speed which exceeds the pitch cutting speed of the rollers,
  • Means for forming longitudinally extending slots in strip material according to claim 5 wherein said frame includes two pairs of upstanding slides, respective said bearings being guided for vertical movement between the slides of said pairs, and threaded members interconnecting the bearings and frame and constituting adjustment means for effecting adjustment of height of the bearings.
  • Means for forming longitudinally extending slots in strip material according to claim 7 comprising further threaded members coupling the roller support bearings and the frame and constituting position adjustment means for the back-up roller for adjusting the position of the back-up roller in the direction of the longitudinal axis of the strip material.
  • each of said back-up roller and said series of sliding rollers comprises a shaft, a shoulder at one end of the shaft, a series of annular spacers surrounding the shaft, clamping means clamping the annular spacers against the shoulder, and a tapered recess in each end of each respective said shaft.
  • Means for forming longitudinally extending slots in strip material further comprising an in-feed roll case carried by the frame and extending in one direction from the cutting zone, and an output roll case extending in the opposite direction therefrom.
  • Means for forming longitudinally extending slots in strip material according to claim 10 further comprising height adjustment means between each said roll case and said frame.
  • Means for forming longitudinally extending slots in strip material according to claim 10 further comprising a hold-down roller positioned above the out-feed roll case and adapted to bear against the upper surface of the workpiece at the out-feed side of said cutting zone.
  • Means for forming longitudinally extending slots in strip material according to claim 5 further comprising stripper plates between adjacent said slotting rollers, said stripper plates being positioned to bear against a surface of said strip material as said slots are formed therein.
  • Means for forming longitudinally extending slots in strip material comprising an hydraulic motor coupled to said roll shaft, a tachogenerator coupled to said roller shaft, a direct current electric motor coupled to said transport means, and an electrical circuit interconnecting the tacho-generator and the direct electric current motor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Milling Processes (AREA)
  • Advancing Webs (AREA)
US378833A 1972-07-17 1973-07-13 Means and method of slotting strip metal Expired - Lifetime US3903769A (en)

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AUPA972172 1972-07-17

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US (1) US3903769A (US06826419-20041130-M00005.png)
JP (1) JPS5324021B2 (US06826419-20041130-M00005.png)
AR (1) AR197048A1 (US06826419-20041130-M00005.png)
AU (1) AU471135B2 (US06826419-20041130-M00005.png)
BE (1) BE802417A (US06826419-20041130-M00005.png)
BR (1) BR7305323D0 (US06826419-20041130-M00005.png)
CA (1) CA976868A (US06826419-20041130-M00005.png)
DD (1) DD105138A5 (US06826419-20041130-M00005.png)
DE (1) DE2335966C2 (US06826419-20041130-M00005.png)
ES (1) ES416942A1 (US06826419-20041130-M00005.png)
FR (1) FR2193347A5 (US06826419-20041130-M00005.png)
GB (1) GB1431456A (US06826419-20041130-M00005.png)
HK (1) HK29978A (US06826419-20041130-M00005.png)
IN (1) IN138353B (US06826419-20041130-M00005.png)
IT (1) IT991234B (US06826419-20041130-M00005.png)
NL (1) NL167616C (US06826419-20041130-M00005.png)
OA (1) OA04458A (US06826419-20041130-M00005.png)
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US4033240A (en) * 1975-05-14 1977-07-05 Deslauriers Clovis F Rotary stripping wheel
WO1985004827A1 (en) * 1984-04-26 1985-11-07 Glamagard Pty. Limited Slotting machine
DK151532B (da) * 1976-02-02 1987-12-14 Ampliform Pty Ltd Apparat med roterende skaereorganer til frembringelse af aflange huller i et profileret emne med konstant tvaersnitsform
US4957317A (en) * 1990-04-27 1990-09-18 Taurus Precision, Inc. Drum lock device
CN111230203A (zh) * 2020-02-12 2020-06-05 裴学文 一种自动进料的金属管切割装置
US20220048269A1 (en) * 2018-09-14 2022-02-17 Mitsubishi Heavy Industries Machinery Systems, Ltd. Slotter apparatus, and machine for manufacture of carton

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Publication number Priority date Publication date Assignee Title
JPS5342310B2 (US06826419-20041130-M00005.png) * 1974-08-23 1978-11-10
JPS5826786Y2 (ja) * 1975-02-24 1983-06-09 三菱重工業株式会社 ミゾキリナイフ
JPS5288787U (US06826419-20041130-M00005.png) * 1975-12-26 1977-07-02
JPS5870965U (ja) * 1981-11-06 1983-05-13 トヨタ自動車株式会社 アツパ−バツクの共振防止構造
CN110919065A (zh) * 2019-11-14 2020-03-27 盐城恒仲贸易有限公司 一种广告牌制作用裁剪辅助装置
CN112846363B (zh) * 2021-02-01 2022-12-20 江西经匠建设有限公司 一种绿色建筑用可调节的切割装置
CN113579058B (zh) * 2021-09-28 2021-11-30 江苏兴宇铝业科技有限公司 一种建筑铝模板定位冲孔装置

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US671915A (en) * 1900-10-13 1901-04-09 Oscar Bradford Rolls for cutting expanded metal.
US845764A (en) * 1901-09-23 1907-03-05 Oscar Bradford Machine for slitting sheet metal.
US1441708A (en) * 1920-09-15 1923-01-09 Flintkote Co Machine for cutting slots in raw felt
US2535195A (en) * 1948-07-30 1950-12-26 Jr John Colucci Apparatus for treating wood veneer by forming spaced incomplete slits therein
US2808106A (en) * 1955-04-27 1957-10-01 Crown Zellerbach Corp Slotting device
US3509788A (en) * 1967-11-17 1970-05-05 F P Rosback Co Flat stock perforator

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US2018085A (en) * 1934-05-29 1935-10-22 Allegheny Steel Co Method of making flat expanded grilles
DE823694C (de) * 1948-10-02 1951-12-06 Bosch Gmbh Robert Lochwerkzeug
US3165810A (en) * 1962-08-03 1965-01-19 Pentron Electronics Corp Expanded metal
DE1962104A1 (de) * 1969-12-11 1971-06-16 Hubbuch Heinz Dipl Ing Schnittwerkzeuge in Form von rotierenden Rollwerkzeugen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US671915A (en) * 1900-10-13 1901-04-09 Oscar Bradford Rolls for cutting expanded metal.
US845764A (en) * 1901-09-23 1907-03-05 Oscar Bradford Machine for slitting sheet metal.
US1441708A (en) * 1920-09-15 1923-01-09 Flintkote Co Machine for cutting slots in raw felt
US2535195A (en) * 1948-07-30 1950-12-26 Jr John Colucci Apparatus for treating wood veneer by forming spaced incomplete slits therein
US2808106A (en) * 1955-04-27 1957-10-01 Crown Zellerbach Corp Slotting device
US3509788A (en) * 1967-11-17 1970-05-05 F P Rosback Co Flat stock perforator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033240A (en) * 1975-05-14 1977-07-05 Deslauriers Clovis F Rotary stripping wheel
DK151532B (da) * 1976-02-02 1987-12-14 Ampliform Pty Ltd Apparat med roterende skaereorganer til frembringelse af aflange huller i et profileret emne med konstant tvaersnitsform
WO1985004827A1 (en) * 1984-04-26 1985-11-07 Glamagard Pty. Limited Slotting machine
AU585229B2 (en) * 1984-04-26 1989-06-15 Promenade Australia Pty Limited Slotting machine
US4957317A (en) * 1990-04-27 1990-09-18 Taurus Precision, Inc. Drum lock device
US20220048269A1 (en) * 2018-09-14 2022-02-17 Mitsubishi Heavy Industries Machinery Systems, Ltd. Slotter apparatus, and machine for manufacture of carton
CN111230203A (zh) * 2020-02-12 2020-06-05 裴学文 一种自动进料的金属管切割装置

Also Published As

Publication number Publication date
DD105138A5 (US06826419-20041130-M00005.png) 1974-04-12
NL167616B (nl) 1981-08-17
BR7305323D0 (pt) 1974-08-15
AU471135B2 (en) 1976-04-08
NL167616C (nl) 1982-01-18
DE2335966A1 (de) 1974-02-07
NL7309928A (US06826419-20041130-M00005.png) 1974-01-21
JPS4970289A (US06826419-20041130-M00005.png) 1974-07-08
AR197048A1 (es) 1974-03-08
ZA734556B (en) 1975-01-29
FR2193347A5 (US06826419-20041130-M00005.png) 1974-02-15
AU5789573A (en) 1975-01-09
BE802417A (fr) 1973-11-16
JPS5324021B2 (US06826419-20041130-M00005.png) 1978-07-18
CA976868A (en) 1975-10-28
IT991234B (it) 1975-07-30
OA04458A (fr) 1980-03-15
IN138353B (US06826419-20041130-M00005.png) 1976-01-24
GB1431456A (en) 1976-04-07
DE2335966C2 (de) 1982-12-16
HK29978A (en) 1978-06-23
ES416942A1 (es) 1976-03-01

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