US2093022A - Cutting tool - Google Patents

Cutting tool Download PDF

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Publication number
US2093022A
US2093022A US87496A US8749636A US2093022A US 2093022 A US2093022 A US 2093022A US 87496 A US87496 A US 87496A US 8749636 A US8749636 A US 8749636A US 2093022 A US2093022 A US 2093022A
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Prior art keywords
guide
knife
cutting
belt
tool
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Expired - Lifetime
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US87496A
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John C Olsen
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Flexible Steel Lacing Co
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Flexible Steel Lacing Co
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Priority to US87496A priority Critical patent/US2093022A/en
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    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B9/00Making driving belts or other leather belts or strips
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/20Processes or apparatus for making leather belts
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00Cutting
    • Y10S83/902Attachments for other types of machine
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/667Tool carrier or guide affixed to work during cutting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8821With simple rectilinear reciprocating motion only
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8821With simple rectilinear reciprocating motion only
    • Y10T83/8828Plural tools with same drive means
    • Y10T83/8831Plural distinct cutting edges on same support
    • Y10T83/8834Successively acting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/929Tool or tool with support
    • Y10T83/9454Reciprocable type

Definitions

  • This invention relates to improvements in cutthe cutting tool, one of the parts of the main body ting tool and more specifically but not exclusively, portion having been removed, the view being a-manually operated cutting tool for V-belts. taken in the same direction as that in Figure 2.
  • One object of the invention is to provide a sim- And Figures 4 and 5 are detail transverse sec- 5. ple and efficient tool for cutting and trimming tional views corresponding respectively with the 5 belts and the like, and more particularly a cutsection lines l4 of Figure 3 and 55 of Figting tool designed for cutting or squaring up the ure 1.
  • the improved tool is shown composed of fabric or cords combined with a as comprising, broadly, a main body portion A; resilient material such as rubber. a cutting knife B; and a manually operable car- 10 Many of the V or side driving belts now in rier assembly for the knife at C.
  • the main body portion A comprised of any certain industrial uses, it is often difficult to resuitable material such as brass, aluminum or the move said belts from their pulleys whenever it like, preferably comprises two. sections In and ll 15. becomes necessary to cut and shorten the same with an approximately central line of vertical by introducing a fastener for the cut ends.
  • partition as indicated at I2 in Figure 1. The two other instances where the V or side driving belts parts It and II are adapted to be held rigidly are not of the continuous molded type but have united by any suitable means such as the maends united by a fastener, it is also sometimes chine screws.l3l3.
  • Said guide is defined by a botprovide a portable and manually operable cutting tom horizontal wall I 6 and two parallelly extend- 25 tool such that, when it becomes necessary to cut ing walls I1 and IS, the same being inclined from the belt, particularly V or side driving belts, the the vertical to correspond with the slope of one tool can be readily placed in position for cutting of the side driving faces of the belt l5, as best the belt while the latter is still in operative posishown in Figure 5.
  • Said recess [4 is made of extion on its pulleys to thereby save time and labor tended length preferably by providing an inte- 30 in repairing the belt.
  • a specific object of the invention is to provide as shown best in Figure 1.
  • Tofacilitate the apan improved form of I knife proper especially plication of the tool to a belt in operative posiadapted for effecting an easy, perfectly clean and tion, hereinafter described, one of the walls H8 true transverse cut of a belt, particularly a belt of said extension which defines the guide wall [8, 35 having a rubber or other resilient composition is beveled downwardly toward the outer end of that might otherwise be distorted if out with an the extension l9 as shown in Figure 1. ordinary type of knife.
  • Still another object of the invention is to pro- 1 and i I, the same are provided with complevide a cutting tool of the character indicated in mental longitudinally extending bores or guid 40 the preceding paragraphs so constructed that mg grooves 20 and 2 L as best shown in Figure 3, t maximum Protection to against W the inner ends of which, indicated at I20 and m cldfmtafll Fmury iron ⁇ the kmfe 1S afiorded by respectively, form abutments or limiting stops mamtammg fi gt lt i or elzclosed for the inward movement of the cutter as here- Q for Sue p01.
  • Ions w c are a any parinafter described. Said bores 20 and 2
  • Other objects of the invention will more clearat left hand ends as m saldfigure ly appear from the description and claims hereand are adapted to recelve and gulde Q clljcular inafter f ll ing rods 22 and 2 3 to the outer ends of which is se-
  • Figure 1 is a top plan view of a cutting ably accommodate the palm of the users hand tool embodying the improvements.
  • Figure 2 is thereover When Operating the t 0 essen a side elevation of the device shown in Figure 1.
  • the weight and amount of material required in Figure 3 is an elevational view of the interior of the body parts d l the at y e Par- 55 tially cored or routed out as indicated at 25 and 26.
  • the knife proper B is of special design as shown.
  • the same consists of a plate of suitably treated steel, the same being fastened to the upper guide rod 22 as by the set screws 2l2'l and to the lower guide rod 23 by the set screw 28.
  • the body parts l and l I will be sufiiciently cut back on their adjacent faces in the area defined by the lines 29 and 39 to allow of the movement of the knife B transversely of the guide I4.
  • the shoulder formed on the body parts it] and H as indi cated by the line 30 further serves as a limiting stop for the outward or retractable movement of the knife.
  • the cutting edges of the knife B are of special construction, the same, as shown, comprising a series of three cutting edges proper 3
  • Each cutting edge 3! is also inclined at an angle to the vertical corresponding approximately to the inclination of the driving side N of the belt indicated in Figure 5.
  • each cutting edge 3l32-33 will be preferably double beveled, but preferably of somewhat different angles on the opposite sides.
  • the advance and uppermost cutting edge 3! will first engage the material of the belt or other article being cut and will effect a cut extending only partially downwardly from the top of the belt.
  • the second cutting edge 32 will thereafter engage the material and likewise efiect a partial cutting of the belt but at a lower level.
  • will leave a slit in the material to facilitate the admission of the uppermost portion of the next cutting edge 32.
  • the cutting edge 32 will be followed by the cutting edge 33 with a similar action, the cutting edge 33 completing the severance of the material.
  • the material of the belt usually of resilient character in V-belts, will be subjected to the minimum amount of compression at any particular instant, and hence result in minimization of distortion of the belt during the cutting thereof or trimming off of an end.
  • the pressure from the cutting edges is substantially in a downwardly inclined direction toward the corner of the abutment guide indicated at 215 formed between the bottom of the guide and the abutment I'l.
  • the tool is especially adapted for positioning on belts in operative position on pulleys, as hereinbefore described, obviously the tool can be used on the bench for preparing belts which have been removed from their pulleys.
  • the body of the latter may be provided with a downwardly extended heavy lug 35 of square cross section to adapt the tool to be clamped in the jaws of a vise as diagrammatically indicated by the vise jaws 36 in Figures 1 and 2.
  • a cutting tool for V-belts and the like comprising: a main body having an abutment guide a to receive the belt therein, two of the walls of the guide being disposed at an angle to each other corresponding to the angle between a driving side and adjacent surface of a V-belt, said guide being open on one side; and a knife and carrier therefor mounted Within the main body and slidable transversely across said guide, the knife being at all times entirely enclosed by the body except only such portions thereof as may be moving across the guide at any particular instant.
  • a cutting tool for belts and the like comprising: a main body having an abutment guide com pletely open on one of its sides; a knife carrier 1 slidably mounted in said main body in a direction transverse of the guide, said carrier comprising spaced guide rods; a knife rigidly secured to both of said guide rods; and cooperable shoulders on the main body and knife carrier assembly to limit the movement of the knife in both directions, certain of said limiting stops beingso located that the knife and carrier assemblymay be retracted to a position entirely clear of the guide.
  • a cutting tool for V-belts and the like comprising: a main body of generally elongated form and provided with an abutment guide disposed transversely of the length of the body, said abutment guide having a bottom wall and two side walls, one of said side walls being disposed at an angle to the bottom wall corresponding to the angle between a side driving surface and adjacent surface of a V-belt, said guide being open at its top to permit the positioning of the main body I over a beltwhile in position on its pulleys; guide rods slidably mounted within the main body transversely of the guide; a knife secured to said guide rods and also housed within the main body, said knife and guide, rods being retractable to a position entirely clear of the guide.
  • a cutting tool for V-belts and the like comprising: a main body having an abutment guide to receive the belt therein, the bottom wall and a side wall of the guide being disposed at an angle to each other corresponding to the angle between the driving side and adjacent surface of a V-belt, said guide being open on one side; and a knife and carrier therefor mounted on the main body and slidable transversely across said guide, said knife, during a cutting movement, being movable in a direction toward said side wall of the guide and the knife having a cutting edge inclined to said bottom wall of the guide oppositely to the inclination of said side wall of the guide whereby, during a cutting action, the pressure from the knife is in a general direction such as to force the material being cut into the angle of the guide formed by said bottom and side walls thereof.
  • a knife for a cutting tool having a. series of separated cutting edges, said cutting edges being yond the inner corner of a next adjacent stepped cutting edge whereby to produce successive lines of out at difierent levels with the line of cut of I one cutting edge slightly overlapping the line of cut of the next rearwardly stepped cutting edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Knives (AREA)

Description

Sept. 14,1937. 5. c. OLSEN 2,093,022
CUTTING TOOL Filed June 26, 1936 iki Z,,;,o A TTORNE) Patented Sept. 14, 1937 2,093,022
UNITED STATES PATENT OFFICE CUTTING- TOOL John 0. Olsen, Chicago, Ill., assignor to Flexible Steel Lacing Company, Chicago, 111., a corporation of Illinois Application June 26, 1936, Serial No. 87,496
Claims. (Cl. 16447) This invention relates to improvements in cutthe cutting tool, one of the parts of the main body ting tool and more specifically but not exclusively, portion having been removed, the view being a-manually operated cutting tool for V-belts. taken in the same direction as that in Figure 2.
One object of the invention is to provide a sim- And Figures 4 and 5 are detail transverse sec- 5. ple and efficient tool for cutting and trimming tional views corresponding respectively with the 5 belts and the like, and more particularly a cutsection lines l4 of Figure 3 and 55 of Figting tool designed for cutting or squaring up the ure 1.
ends of V-belts and the like which are usually In said drawing, the improved tool is shown composed of fabric or cords combined with a as comprising, broadly, a main body portion A; resilient material such as rubber. a cutting knife B; and a manually operable car- 10 Many of the V or side driving belts now in rier assembly for the knife at C.
service are of the continuous molded type and in The main body portion A, comprised of any certain industrial uses, it is often difficult to resuitable material such as brass, aluminum or the move said belts from their pulleys whenever it like, preferably comprises two. sections In and ll 15. becomes necessary to cut and shorten the same with an approximately central line of vertical by introducing a fastener for the cut ends. In partition as indicated at I2 in Figure 1. The two other instances where the V or side driving belts parts It and II are adapted to be held rigidly are not of the continuous molded type but have united by any suitable means such as the maends united by a fastener, it is also sometimes chine screws.l3l3.
difficult to obtain access to the belt to release the The two body sections Ill and I I, when united, 2o fastener when it becomes necessary to take the define an abutment guide or recess M which, in belt 01f the pulleys for the purpose of shortening the instance shown, is adapted to receive a V-belt the same by the introduction of another fastener. of the cross section'indicated by dotted lines at Another object of the invention therefore, is to IS in Figure 5. Said guide is defined by a botprovide a portable and manually operable cutting tom horizontal wall I 6 and two parallelly extend- 25 tool such that, when it becomes necessary to cut ing walls I1 and IS, the same being inclined from the belt, particularly V or side driving belts, the the vertical to correspond with the slope of one tool can be readily placed in position for cutting of the side driving faces of the belt l5, as best the belt while the latter is still in operative posishown in Figure 5. Said recess [4 is made of extion on its pulleys to thereby save time and labor tended length preferably by providing an inte- 30 in repairing the belt. gral extension l9 on the body part or section l0,
- A specific object of the invention is to provide as shown best in Figure 1. Tofacilitate the apan improved form of I knife proper especially plication of the tool to a belt in operative posiadapted for effecting an easy, perfectly clean and tion, hereinafter described, one of the walls H8 true transverse cut of a belt, particularly a belt of said extension which defines the guide wall [8, 35 having a rubber or other resilient composition is beveled downwardly toward the outer end of that might otherwise be distorted if out with an the extension l9 as shown in Figure 1. ordinary type of knife. On the inside abutting faces of the body parts Still another object of the invention is to pro- 1 and i I, the same are provided with complevide a cutting tool of the character indicated in mental longitudinally extending bores or guid 40 the preceding paragraphs so constructed that mg grooves 20 and 2 L as best shown in Figure 3, t maximum Protection to against W the inner ends of which, indicated at I20 and m cldfmtafll Fmury iron} the kmfe 1S afiorded by respectively, form abutments or limiting stops mamtammg fi gt lt i or elzclosed for the inward movement of the cutter as here- Q for Sue p01. Ions w c are a any parinafter described. Said bores 20 and 2|, Ver ticular moment being actually employed in sevu mated. as shown in H ure 3 ering the belt or other article being cut. y sep g Other objects of the invention will more clearat left hand ends as m saldfigure ly appear from the description and claims hereand are adapted to recelve and gulde Q clljcular inafter f ll ing rods 22 and 2 3 to the outer ends of which is se- In the drawing forming a part of this Specificacured a handle 24 of suitable shape to comforttion, Figure 1 is a top plan view of a cutting ably accommodate the palm of the users hand tool embodying the improvements. Figure 2 is thereover When Operating the t 0 essen a side elevation of the device shown in Figure 1. the weight and amount of material required in Figure 3 is an elevational view of the interior of the body parts d l the at y e Par- 55 tially cored or routed out as indicated at 25 and 26.
The knife proper B is of special design as shown. The same consists of a plate of suitably treated steel, the same being fastened to the upper guide rod 22 as by the set screws 2l2'l and to the lower guide rod 23 by the set screw 28. To accommodate the knife B on the rods 22 and 23, the latter are partially cut away where the knife plate is secured thereto, as clearly shown in Figures 3 and 4 and, as will be understood, the body parts l and l I will be sufiiciently cut back on their adjacent faces in the area defined by the lines 29 and 39 to allow of the movement of the knife B transversely of the guide I4. The shoulder formed on the body parts it] and H as indi cated by the line 30 further serves as a limiting stop for the outward or retractable movement of the knife. With the construction of operating carrier for the knife and that of the body A above described, it will be seen that not only is the knife very firmly supported and guided so as to eliminate any displacement from its true line of movement, but also that the knife is practically entirely enclosed or conceal d at any point in its movement with the exception only of such portions thereof as may be positioned within the abutment guide at any particular moment. It will further be observed that the knife B including the extended end of the longer upper guide rod 23 may be retracted to such position toward the left as viewed in Figure 3 as to entirely clear the guide I4 and thus leave the latter entirely free and clear to enable the tool to be positioned over a belt which may be; in place on its pulleys.
The cutting edges of the knife B are of special construction, the same, as shown, comprising a series of three cutting edges proper 3|, 32 and 33 stepped successively downwardly and also stepped rearwardly from the advance edge of the cutter. Each cutting edge 3! is also inclined at an angle to the vertical corresponding approximately to the inclination of the driving side N of the belt indicated in Figure 5. Furthermore, the
lower corner of each cutting edge as indicated at I33 for the edge 3|, is positioned slightly below the upper corner of the next adjacent stepped edge, as for instance, edge 32. In actual practice, each cutting edge 3l32-33 will be preferably double beveled, but preferably of somewhat different angles on the opposite sides.
With the stepped form of cutting edges described, it will be evident that the advance and uppermost cutting edge 3! will first engage the material of the belt or other article being cut and will effect a cut extending only partially downwardly from the top of the belt. As it advances through the material, the second cutting edge 32 will thereafter engage the material and likewise efiect a partial cutting of the belt but at a lower level. In this connection it will be seen that the cut produced by the first knife edge 3| will leave a slit in the material to facilitate the admission of the uppermost portion of the next cutting edge 32. Similarly, the cutting edge 32 will be followed by the cutting edge 33 with a similar action, the cutting edge 33 completing the severance of the material. With this arrangement of successive cuts at different levels, the material of the belt, usually of resilient character in V-belts, will be subjected to the minimum amount of compression at any particular instant, and hence result in minimization of distortion of the belt during the cutting thereof or trimming off of an end. As will be clear from Figures 3 and 5, the pressure from the cutting edges is substantially in a downwardly inclined direction toward the corner of the abutment guide indicated at 215 formed between the bottom of the guide and the abutment I'l. Because of the action of the knife just described, combined with the fact that the belt is thereby always pressed snugly into the angle formed by the converging surfaces of the abutment guide, the belt is positively held against turning or twisting during the cutting action, thus insurin a perfectly true cut at right angles to the length of the belt, the out being obtained without any ragged or offset edge portions. In this connection it will be noted that the action and result described are obtained without the necessity of any hold-downs or clamping devices.
While the tool is especially adapted for positioning on belts in operative position on pulleys, as hereinbefore described, obviously the tool can be used on the bench for preparing belts which have been removed from their pulleys. To facilitate this use of the tool, the body of the lattermay be provided with a downwardly extended heavy lug 35 of square cross section to adapt the tool to be clamped in the jaws of a vise as diagrammatically indicated by the vise jaws 36 in Figures 1 and 2.
Although there has herein been shown and described what is now considered the preferred manner of carrying out the invention, the same is merely illustrative and all changes and modifications are contemplated that come within the scope of the claims appended hereto.
What is claimed is:
1. A cutting tool for V-belts and the like comprising: a main body having an abutment guide a to receive the belt therein, two of the walls of the guide being disposed at an angle to each other corresponding to the angle between a driving side and adjacent surface of a V-belt, said guide being open on one side; and a knife and carrier therefor mounted Within the main body and slidable transversely across said guide, the knife being at all times entirely enclosed by the body except only such portions thereof as may be moving across the guide at any particular instant.
2. A cutting tool for belts and the like comprising: a main body having an abutment guide com pletely open on one of its sides; a knife carrier 1 slidably mounted in said main body in a direction transverse of the guide, said carrier comprising spaced guide rods; a knife rigidly secured to both of said guide rods; and cooperable shoulders on the main body and knife carrier assembly to limit the movement of the knife in both directions, certain of said limiting stops beingso located that the knife and carrier assemblymay be retracted to a position entirely clear of the guide.
3. A cutting tool for V-belts and the like comprising: a main body of generally elongated form and provided with an abutment guide disposed transversely of the length of the body, said abutment guide having a bottom wall and two side walls, one of said side walls being disposed at an angle to the bottom wall corresponding to the angle between a side driving surface and adjacent surface of a V-belt, said guide being open at its top to permit the positioning of the main body I over a beltwhile in position on its pulleys; guide rods slidably mounted within the main body transversely of the guide; a knife secured to said guide rods and also housed within the main body, said knife and guide, rods being retractable to a position entirely clear of the guide.
4. A cutting tool for V-belts and the like comprising: a main body having an abutment guide to receive the belt therein, the bottom wall and a side wall of the guide being disposed at an angle to each other corresponding to the angle between the driving side and adjacent surface of a V-belt, said guide being open on one side; and a knife and carrier therefor mounted on the main body and slidable transversely across said guide, said knife, during a cutting movement, being movable in a direction toward said side wall of the guide and the knife having a cutting edge inclined to said bottom wall of the guide oppositely to the inclination of said side wall of the guide whereby, during a cutting action, the pressure from the knife is in a general direction such as to force the material being cut into the angle of the guide formed by said bottom and side walls thereof.
5. A knife for a cutting tool having a. series of separated cutting edges, said cutting edges being yond the inner corner of a next adjacent stepped cutting edge whereby to produce successive lines of out at difierent levels with the line of cut of I one cutting edge slightly overlapping the line of cut of the next rearwardly stepped cutting edge.
JOHN C. OLSEN.
US87496A 1936-06-26 1936-06-26 Cutting tool Expired - Lifetime US2093022A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792061A (en) * 1954-09-03 1957-05-14 Maiocchi Dario Slitting press
US3247587A (en) * 1963-04-17 1966-04-26 Stratoflex Inc Apparatus for slitting
US4231275A (en) * 1978-10-19 1980-11-04 Nobuo Onishi Cutter for thin boards

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792061A (en) * 1954-09-03 1957-05-14 Maiocchi Dario Slitting press
US3247587A (en) * 1963-04-17 1966-04-26 Stratoflex Inc Apparatus for slitting
US4231275A (en) * 1978-10-19 1980-11-04 Nobuo Onishi Cutter for thin boards

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