CA2231982A1 - Method for manufacturing blades for ice skates, and blades obtained with said method - Google Patents
Method for manufacturing blades for ice skates, and blades obtained with said method Download PDFInfo
- Publication number
- CA2231982A1 CA2231982A1 CA002231982A CA2231982A CA2231982A1 CA 2231982 A1 CA2231982 A1 CA 2231982A1 CA 002231982 A CA002231982 A CA 002231982A CA 2231982 A CA2231982 A CA 2231982A CA 2231982 A1 CA2231982 A1 CA 2231982A1
- Authority
- CA
- Canada
- Prior art keywords
- blade
- blades
- steel
- ice
- manufacturing
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 5
- 239000010962 carbon steel Substances 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 229910000760 Hardened steel Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 238000011282 treatment Methods 0.000 description 4
- 238000003698 laser cutting Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- MYWUZJCMWCOHBA-VIFPVBQESA-N methamphetamine Chemical compound CN[C@@H](C)CC1=CC=CC=C1 MYWUZJCMWCOHBA-VIFPVBQESA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C1/00—Skates
- A63C1/42—Manufacture of skates
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
A method for manufacturing ice-skate blades and blades obtained with the method, the method entailing the continuous unwinding from a band or pack or the use of a flat sheet of carbon steel, alloys steels, sintered steels, stainless steel, hardened steel, tempered steel, straightened steel, stretched steel with a preset hardness, and the cutting of the sheet with a laser unit to obtain a blade which is subsequently chromium-plated.
Description
METHOI) FOR MANUFACTURING BLADES FOR ICE SKATES, AND BLADES
OBTAINED WITH SAID METHOD
The present invention relates to a method for manufacturing blades for ice skates and to blades obtained with said method.
Currently, it is known to use cold-rolled carbon steel (C.70/C.100) or stainless steel as raw material for manufacturing blades for ice skates. This is done to prevent the blade frorn having excessive rounding-off on the punch penetration side and to prevent the steel being used from undergoing excessive deformations during subsequent treat:ments in the various production steps. In practice, it is necessary to increase the toughness and flatness of the steel by means of the known cold-rolling process.
The steel in sheet form is then blanked by using so-called "American-style" dies which are equipped with powe~-ful blank holder<;.
The blanking process always causes microcracks or microscopic fissures inside the steel which, by expanding during hardening, often lead to breakage.
Moreover, these microcracks are observed only at the end of the process, or even in the very last step of the production of the finished product (the skate), during the injection of the plastic material in a mold in which the blade has already been inserted in an appropriately provi.ded seat in order to obtain supports for a shoe.
The known manufacturing method also entails honing the blanked blade by means of sand belts with a suitable machi.ne. This system llows to remove the rounding-off and the inclined plane formed during blanking and reduces as much as possible the~ microcracks that have formed due to blanking shear.
Honing compromises the qualities of the product in terms of dimensions and finish, since it is in fact impossible to maintain the length and the profile of the blacle exactly.
The blade, formed as mentioned above, is not very tough and has various irregularities, especially on its prolile.
In order to achieve greater strength of the steel and the sharp edge (for example 55/56 HRC) required on the profile, it is necessary to austenitize the blade and therefore subject it to hardening with oil or salt quenching in order to obtain a chosen hardness (for example 15 62/63 HRC).
The known system for fixing ice-skating blades then entails subjecting the blade, after the above-mentioned treatments, to tempering and stress relieving, so as to achieve flatness of the part, a hardness of 53/54 HRC and make the material tension-free.
Accordingly, stress relieving in a pack configuration is performed by bolting to clamps and tempering.
However, the deformation of the perimetric shape is not eliminated, which often causes problems in the insertion of the blade in the seat of the injection mold, cau<,ing breakage of the mold.
The method for manufacturing conventional ice-skating blades further entails lapping the two sides by means of lapping machines. The lapping of the two sides of the blade becomes necessary to remove from the blade the oxide and the scale that have formed during hardening.
Lapping is performed by usinc~ abrasive belts supported by rubber rollers at: a pressure of 2/3 atm: this system yields good results :in terms of removal of oxide and scale 5 residues from the blade, but at the same time causes a rounding-off of the profile and alters the thickness of the blacle.
The altered thickness and the rounding-off of the blacle sometimes make the blade unusable, thus generating a lo large number of prodl;lction rejects; in any case, the final result does not meet the demands of the users of these products.
The known method for manufacturing ice-skating blades furt:her entails a chromium-plating process with a nickel 15 baching for adhesion to the hardened metal and a flash of opaque chromium, used to protect the blade against rust and at t:he same time give an aesthetic covering.
The known manuiacturing method provides for a final step which consists in checking the final products and 20 therefore the blades.
As mentioned above, there are many technical ope:-ations to which the raw material is subjected initially and to which each bl,~de is subjected subsequently.
Each operation is aimed at achieving an important 25 aspect of the finished product, such as hardness, strength, dimensions and profile, but at the same time these treatments produce changes in the material and in the shape, but most of all in the finish.
This known method therefore entails production rejects 30 which considerably increase the overall cost of the finished product; these rejects can be assessed as constituting 3-4% of the manufactured product.
The aim of the present invention is to solve the above-mentioned prob:Lems, eliminating the drawbacks of the s cited prior art, and thus to provide a method which allows to obtain blades for ice skates having an optimum degree of finish and at the same time has very low manufacturing cost:s.
Within the scope of this aim, an important object of 10 the present invention is to provide a method which allows to obtain blades for ice skates which are free from any kincl of perimetric deformation.
Another important object of the present invention is to provide a method for manufacturing ice-skate blades lS whi,-h have constan1: characteristics, such as to allow product certification.
Another object of the present invention is to provide a method which allows to obtain a large number of blades, all having the same characteristics, and at a low cost.
This aim, these objects and others which will become apparent hereinafter are achieved by a method for manufacturing ice-skate blades, characterized in that it comprises the steps of: continuous unwinding from a band or pack or the use of a flat sheet of carbon steel, alloy steels, sintered steels, stainless steel, hardened steel, tempered steel, straightened steel, satin finish steel with a preset hardness; cutting said sheet with a laser unit to obtain a blade; and chromium-plating said blade.
Advantageously, the blade has a perfectly sharp and uniform cutting edge and means for locking and retaining the plastic material that constitutes the support for a shoe.
Further characteristics and advantages of the invention will become apparent from the following detailed description of a particular but not exclusive embodiment thereof, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
figure 1 is a view of a band in which blades have been cut by means of a laser unit;
figure 2 is a partially sectional lateral perspective view of the blade, p<~rtially embedded in the support for a ShO~! .
With reference to the above figures, the reference numeral 1 designates a laser source which is used to cut continuously, i.e., from a band 2 or from strips, blades 3 which can be used for ice skates.
Laser cutting is performed for example on carbon steel (C70/C100) which is hardened, tempered, straightened, satin finished with a hardness of preferably 53/54 HRC, which is cert:ifiable.
Use of this m~lterial allows to achieve a better quality of the blade 3 than allowed by the known hardening and tempering treatment, as well as better flatness and strength of the blacle; advantageously, it is possible to use steel sheets with a thickness of 3 or 4 millimeters.
Laser cutting aLlows to obtain, directly from the raw material, the blade ready for chromium-plating and without rounding-offs caused for example by blanking and lapping as in t:he methods of the prior art.
Laser cutting also allows to meet all demands as to dimensions, such as length, width and thickness of the blade, simultaneously eliminating any kind of perimetric deformation; this in practice is not possible with the meth.ods used in the cited prior art.
Use of the source 1 and of the corresponding cutting of the band 2 allows to modify and/or customize the material, acting in i.ndividual points or on complete parts, obta.ining the blade in a short time and with very low cost.s.
Another characteristic is the high quality of the lo blad~e: production of high-quality ice-skating blades in fact: no longer requires investments in machines for blanking, sand belt<; and equipment of various kinds as previously mentioned in the prior art; moreover, with the described technology it is possible to obtain a high-qual.ity product witll a blade provided with a perfectly shar-p and uniform cutting edge, without alterations in the material and shapes, which perfectly meets the demands in terms of dimensions .~nd profile, all this being obtainable in a very short time.
The blade thus obtained also allows to give the end use:r a tool which fully meets the requirements and expe~ctations, also a:Llowing to introduce products having a given certification. The certification can be provided throughout production and can relate to the hardness of the mate.~rial of which the blade is made and the final treatment to which it is subjected, thus ensuring the absence of deformations or microcracks or rounding-offs or other drawbacks noted in the prior art.
Advantageously, the blade can be obtained so as to also provide means for locking and retaining the plastic material, designated by the reference numeral 4, that constitutes the support 5 for a shoe. Such means are constituted by suitable undulated regions 6 formed at suitable recesses 7 Iefined on the edge of the blade that does; not interact with the ice.
It has thus been observed that the invention has achieved the intended aim and objects, a method having ~een provided which allows to obtain ice-skate blades of high quality, in a short time and at a low cost, with a lo periectly sharp and uniform cutting edge, without alterations in the material and in the shape and which peri-ectly meets the demands of the user in terms of dimensions and profile.
The present invention is of course susceptible of numerous modifications and variations, all of which are within the scope of t:he same inventive concept.
Thus, for example, the number of blades obtainable from the individual band can be the most pertinent according to specific: requirements. The same applies to the cutling technique whereby the laser source can be cont:rolled by a numeric-control device in order to optimize the material so as to obtain a large number of blades with a very low waste of material.
The type of steel may of course also be the most pertinent according to specific requirements, like the shape and the dimensions of the blade; likewise, it is possible to use carbon steel or sintered steel or alloy steel or stainless steel.
OBTAINED WITH SAID METHOD
The present invention relates to a method for manufacturing blades for ice skates and to blades obtained with said method.
Currently, it is known to use cold-rolled carbon steel (C.70/C.100) or stainless steel as raw material for manufacturing blades for ice skates. This is done to prevent the blade frorn having excessive rounding-off on the punch penetration side and to prevent the steel being used from undergoing excessive deformations during subsequent treat:ments in the various production steps. In practice, it is necessary to increase the toughness and flatness of the steel by means of the known cold-rolling process.
The steel in sheet form is then blanked by using so-called "American-style" dies which are equipped with powe~-ful blank holder<;.
The blanking process always causes microcracks or microscopic fissures inside the steel which, by expanding during hardening, often lead to breakage.
Moreover, these microcracks are observed only at the end of the process, or even in the very last step of the production of the finished product (the skate), during the injection of the plastic material in a mold in which the blade has already been inserted in an appropriately provi.ded seat in order to obtain supports for a shoe.
The known manufacturing method also entails honing the blanked blade by means of sand belts with a suitable machi.ne. This system llows to remove the rounding-off and the inclined plane formed during blanking and reduces as much as possible the~ microcracks that have formed due to blanking shear.
Honing compromises the qualities of the product in terms of dimensions and finish, since it is in fact impossible to maintain the length and the profile of the blacle exactly.
The blade, formed as mentioned above, is not very tough and has various irregularities, especially on its prolile.
In order to achieve greater strength of the steel and the sharp edge (for example 55/56 HRC) required on the profile, it is necessary to austenitize the blade and therefore subject it to hardening with oil or salt quenching in order to obtain a chosen hardness (for example 15 62/63 HRC).
The known system for fixing ice-skating blades then entails subjecting the blade, after the above-mentioned treatments, to tempering and stress relieving, so as to achieve flatness of the part, a hardness of 53/54 HRC and make the material tension-free.
Accordingly, stress relieving in a pack configuration is performed by bolting to clamps and tempering.
However, the deformation of the perimetric shape is not eliminated, which often causes problems in the insertion of the blade in the seat of the injection mold, cau<,ing breakage of the mold.
The method for manufacturing conventional ice-skating blades further entails lapping the two sides by means of lapping machines. The lapping of the two sides of the blade becomes necessary to remove from the blade the oxide and the scale that have formed during hardening.
Lapping is performed by usinc~ abrasive belts supported by rubber rollers at: a pressure of 2/3 atm: this system yields good results :in terms of removal of oxide and scale 5 residues from the blade, but at the same time causes a rounding-off of the profile and alters the thickness of the blacle.
The altered thickness and the rounding-off of the blacle sometimes make the blade unusable, thus generating a lo large number of prodl;lction rejects; in any case, the final result does not meet the demands of the users of these products.
The known method for manufacturing ice-skating blades furt:her entails a chromium-plating process with a nickel 15 baching for adhesion to the hardened metal and a flash of opaque chromium, used to protect the blade against rust and at t:he same time give an aesthetic covering.
The known manuiacturing method provides for a final step which consists in checking the final products and 20 therefore the blades.
As mentioned above, there are many technical ope:-ations to which the raw material is subjected initially and to which each bl,~de is subjected subsequently.
Each operation is aimed at achieving an important 25 aspect of the finished product, such as hardness, strength, dimensions and profile, but at the same time these treatments produce changes in the material and in the shape, but most of all in the finish.
This known method therefore entails production rejects 30 which considerably increase the overall cost of the finished product; these rejects can be assessed as constituting 3-4% of the manufactured product.
The aim of the present invention is to solve the above-mentioned prob:Lems, eliminating the drawbacks of the s cited prior art, and thus to provide a method which allows to obtain blades for ice skates having an optimum degree of finish and at the same time has very low manufacturing cost:s.
Within the scope of this aim, an important object of 10 the present invention is to provide a method which allows to obtain blades for ice skates which are free from any kincl of perimetric deformation.
Another important object of the present invention is to provide a method for manufacturing ice-skate blades lS whi,-h have constan1: characteristics, such as to allow product certification.
Another object of the present invention is to provide a method which allows to obtain a large number of blades, all having the same characteristics, and at a low cost.
This aim, these objects and others which will become apparent hereinafter are achieved by a method for manufacturing ice-skate blades, characterized in that it comprises the steps of: continuous unwinding from a band or pack or the use of a flat sheet of carbon steel, alloy steels, sintered steels, stainless steel, hardened steel, tempered steel, straightened steel, satin finish steel with a preset hardness; cutting said sheet with a laser unit to obtain a blade; and chromium-plating said blade.
Advantageously, the blade has a perfectly sharp and uniform cutting edge and means for locking and retaining the plastic material that constitutes the support for a shoe.
Further characteristics and advantages of the invention will become apparent from the following detailed description of a particular but not exclusive embodiment thereof, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
figure 1 is a view of a band in which blades have been cut by means of a laser unit;
figure 2 is a partially sectional lateral perspective view of the blade, p<~rtially embedded in the support for a ShO~! .
With reference to the above figures, the reference numeral 1 designates a laser source which is used to cut continuously, i.e., from a band 2 or from strips, blades 3 which can be used for ice skates.
Laser cutting is performed for example on carbon steel (C70/C100) which is hardened, tempered, straightened, satin finished with a hardness of preferably 53/54 HRC, which is cert:ifiable.
Use of this m~lterial allows to achieve a better quality of the blade 3 than allowed by the known hardening and tempering treatment, as well as better flatness and strength of the blacle; advantageously, it is possible to use steel sheets with a thickness of 3 or 4 millimeters.
Laser cutting aLlows to obtain, directly from the raw material, the blade ready for chromium-plating and without rounding-offs caused for example by blanking and lapping as in t:he methods of the prior art.
Laser cutting also allows to meet all demands as to dimensions, such as length, width and thickness of the blade, simultaneously eliminating any kind of perimetric deformation; this in practice is not possible with the meth.ods used in the cited prior art.
Use of the source 1 and of the corresponding cutting of the band 2 allows to modify and/or customize the material, acting in i.ndividual points or on complete parts, obta.ining the blade in a short time and with very low cost.s.
Another characteristic is the high quality of the lo blad~e: production of high-quality ice-skating blades in fact: no longer requires investments in machines for blanking, sand belt<; and equipment of various kinds as previously mentioned in the prior art; moreover, with the described technology it is possible to obtain a high-qual.ity product witll a blade provided with a perfectly shar-p and uniform cutting edge, without alterations in the material and shapes, which perfectly meets the demands in terms of dimensions .~nd profile, all this being obtainable in a very short time.
The blade thus obtained also allows to give the end use:r a tool which fully meets the requirements and expe~ctations, also a:Llowing to introduce products having a given certification. The certification can be provided throughout production and can relate to the hardness of the mate.~rial of which the blade is made and the final treatment to which it is subjected, thus ensuring the absence of deformations or microcracks or rounding-offs or other drawbacks noted in the prior art.
Advantageously, the blade can be obtained so as to also provide means for locking and retaining the plastic material, designated by the reference numeral 4, that constitutes the support 5 for a shoe. Such means are constituted by suitable undulated regions 6 formed at suitable recesses 7 Iefined on the edge of the blade that does; not interact with the ice.
It has thus been observed that the invention has achieved the intended aim and objects, a method having ~een provided which allows to obtain ice-skate blades of high quality, in a short time and at a low cost, with a lo periectly sharp and uniform cutting edge, without alterations in the material and in the shape and which peri-ectly meets the demands of the user in terms of dimensions and profile.
The present invention is of course susceptible of numerous modifications and variations, all of which are within the scope of t:he same inventive concept.
Thus, for example, the number of blades obtainable from the individual band can be the most pertinent according to specific: requirements. The same applies to the cutling technique whereby the laser source can be cont:rolled by a numeric-control device in order to optimize the material so as to obtain a large number of blades with a very low waste of material.
The type of steel may of course also be the most pertinent according to specific requirements, like the shape and the dimensions of the blade; likewise, it is possible to use carbon steel or sintered steel or alloy steel or stainless steel.
Claims (5)
1. A method for manufacturing ice-skate blades, comprising the steps of: continuous unwinding from a band or pack or the use of a flat sheet of hardened, quenched, straightened, satin finished steel with a preset hardness;
cutting said sheet with a laser unit to obtain a blade; and chromium-plating said blade.
cutting said sheet with a laser unit to obtain a blade; and chromium-plating said blade.
2. A method according to claim 1, wherein said blade has a sharp and uniform cutting edge and means for locking and retaining a support for a shoe.
3. A method according to claim 2, wherein said means for locking and retaining the support are constituted by one or more undulated regions formed at suitable recesses provided on the profile of said blade that does not interact with the ice.
4. A method according to claim 1, wherein said steel is of the carbon or alloy or sintered or stainless type.
5. A blade for an ice-skate, wherein it is manufactured by the method of claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT97TV000165A IT1297299B1 (en) | 1997-11-26 | 1997-11-26 | PROCEDURE FOR OBTAINING BLADES FOR ICE SKATES AND BLADES OBTAINED WITH THE SAID PROCEDURE |
| ITTV97A000165 | 1997-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2231982A1 true CA2231982A1 (en) | 1999-05-26 |
Family
ID=11420278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002231982A Abandoned CA2231982A1 (en) | 1997-11-26 | 1998-03-12 | Method for manufacturing blades for ice skates, and blades obtained with said method |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0919262A1 (en) |
| CA (1) | CA2231982A1 (en) |
| IT (1) | IT1297299B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107349595B (en) * | 2017-08-05 | 2019-09-13 | 泉州台商投资区雷墨设计有限公司 | A kind of skating boots skates with alloy coat |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE81379C (en) * | ||||
| CA1105510A (en) * | 1979-07-13 | 1981-07-21 | George Couture | Skate blade |
| DE3228460A1 (en) * | 1982-07-30 | 1984-02-09 | Dornseif Sport GmbH, 5608 Radevormwald | Skate and method for its manufacture |
| US5360227A (en) * | 1987-03-31 | 1994-11-01 | Lemelson Jerome H | Skis and runners |
-
1997
- 1997-11-26 IT IT97TV000165A patent/IT1297299B1/en active IP Right Grant
-
1998
- 1998-03-09 EP EP98104127A patent/EP0919262A1/en not_active Withdrawn
- 1998-03-12 CA CA002231982A patent/CA2231982A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| ITTV970165A0 (en) | 1997-11-26 |
| IT1297299B1 (en) | 1999-09-01 |
| EP0919262A1 (en) | 1999-06-02 |
| ITTV970165A1 (en) | 1999-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20130081283A1 (en) | Composite knife blade | |
| US10188934B2 (en) | Ice skate and runner therefor | |
| EP0581806B1 (en) | Knife blades | |
| JP2003033454A (en) | Method for producing golf club head | |
| US20040187644A1 (en) | Method for manufacturing a razor blade | |
| US7578217B2 (en) | Manufacturing razor blades | |
| CA2477022C (en) | Nitinol ice blades | |
| CA2231982A1 (en) | Method for manufacturing blades for ice skates, and blades obtained with said method | |
| US2090325A (en) | Clicker die stock | |
| DK2262627T3 (en) | Cutting lines for cutting flat materials | |
| US3872744A (en) | Self-emptying punching tool | |
| US3052139A (en) | Method of making steel rule blanking die | |
| US2016770A (en) | Blade drawing die | |
| US6978532B1 (en) | Mower bed blade method | |
| JPH0141420B2 (en) | ||
| EP1570191B1 (en) | Method for producing a transverse element for a push belt for a continuously variable transmission | |
| JPS60258416A (en) | Safety razor blade and its production | |
| US7266985B2 (en) | Method of processing metal parts by blanking | |
| US1942324A (en) | Scissors and method of manufacturing the same | |
| USRE20525E (en) | Method of manufacturing scissors | |
| RU2131468C1 (en) | Process of hardening of cutting edges of parts of machines and tools | |
| DE1553631A1 (en) | Cutting object, in particular razor blade, the cutting edge of which, but at least the cutting edge tip, is surface-hardened, in particular nitrided | |
| US2846001A (en) | Shoe cutting die | |
| US655484A (en) | Process of forming pinking-cutters. | |
| DE81379C (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |