EP0214943A2 - Grinding jig for knives - Google Patents
Grinding jig for knives Download PDFInfo
- Publication number
- EP0214943A2 EP0214943A2 EP86850280A EP86850280A EP0214943A2 EP 0214943 A2 EP0214943 A2 EP 0214943A2 EP 86850280 A EP86850280 A EP 86850280A EP 86850280 A EP86850280 A EP 86850280A EP 0214943 A2 EP0214943 A2 EP 0214943A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- knife
- plates
- screw
- plate
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
Definitions
- This invention relates to a grinding jig for knives in accordance with the preamble for claim 1. It is for instance intended for use with grinding machines provided with grindstones and equipped with a fixed support of the type described in Swedish application 8306325-5.
- the knives are different not only in respect of length and width but also in form which can be quite straight to more or less bent. Further more, the thickness of the knives varies and they have different cross-sectional forms. Last but not least important is that the knives have different edge angles due to different uses.
- said Swedish application teaches a grinding jig or universal carrier for knives which partly make the grinding work with knives easier.
- the known carrier with the great number of varying forms of knives touched upon above.
- the present invention it is however possible to adjust and move the knife edge across the grindstone by means of a carrier or grinding jig so that the best possible results are obtained, independently of the form of the knife and the knife edge.
- the grinding jig of the invention also allows an unexperienced person to grind all types of knives easily and quickly.
- Fig. 1 shows a grinding jig according to the invention in section and in a position for grinding a knife
- Fig. 2 is a lateral view of the grinding jig in section
- fig. 3 shows the grinding jig turned 90° relative to Fig. 2
- fig. 4 shows a section of the grinding jig as seen in a direction transversely to the length of the knife-blade.
- Fig. 1 1 designates the grindig stone.
- 2 designates a support in the form of a clamp fixedly secured to the grinding machine and having an arm 3 extending in parallel with the axle of the grindstone.
- the grinding machine with support and arm is known per se and is not part of the invention, and therefore this will not be described more closely but it is referred in this connection to said Swedish application 8306325-5.
- the grinding jig consists of a first clamping plate 4 and a second clamping plate 5 as well as a shaft 6 circular in section and fixedly secured to the first clamping plate.
- This shaft is threaded along part of the end 7 turned away from the first clamping plate 4.
- the bore 8 can either be completely threaded or have a threaded inset 11 fixed to the handle 9, as shown on the drawing.
- FIG. 3 an example of the embodiment of the clamping plate 5 as seen in a top plane view is shown, and it is to be understood that the clamping plate 4 has the corresponding form except for the means of attachment 12 of the shaft 6.
- the clamping plates 4 and 5 are mounted to each other by means of a screw 13, which in the example shown extends through the clamping plate 5 and is screwed into the threads of a busing 14 attached to the clamping plate 4.
- the head of the screw 13 has a partly spherical inside which rests in a corresponding partly spherical seat of the clamping plate 5.
- the distance between the plates 4 and 5 can be optionally adjusted by the aid of the screw 13 in dependence on the thickness of the knife 15 to be ground. Thanks to the partly spherical form of the inside of the screw head and its cooperating seat of the clamping plate 5 the plates can place themselves obliquely relative to each other and consequently adapt themselves to various forms of knives.
- the clamping plate is further provided with a threaded hole 16, in the example shown made in a bushing 17 attached to the clamping plate.
- a screw 19 provided with a wheel 18 engages the threads in the threaded hole 16 and bears with its free end on the clamping plate 4.
- the threaded hole 16 is arranged on the other side of the screw 13 and, more specifically, at a distance from this being greater than the distance between the edge portions and the screw 13.
- a pair of guide pins 20 - see Fig. 4 - are attached to the plate 5.
- the pins 20 extend freely movably through the corresponding openings in the plate 4.
- a helical compression spring 21 is arranged around the respective pin 20 and between the plates 4 and 5. The springs 21 tend automatically to separate the plates 4 and 5 from each other which makes it easier to adapt the knife between the edge portions of the plates.
- the jig By adjusting the screw 13 the jig can be adapted to the thickness of the current knife and the knife is clamped in the jig when the locking screw 19 is tightened.
- the clamping plates 4 and 5 will thus adapt themselves automatically to the form of the relative knife independently whether this is conical in cross-section or in longitunidal direction.
- the knife is locked in the jig and both sides of the knife edge can be ground by simply turning the jig 180°.
- a low built-in type of adjusting screw 13 and locking screw 18 allows grinding of small edge angles (cf. Fig. 1).
- clamping plates 4 and 5 it is possible also to grind thin knives, so-called fillet knives, which are easily bent at grinding by hand.
- the thin knife is stiffened up effectively by means of the invention and can be ground with precision.
- the grinding jig can be varied in several ways within the scope of the invention and the placement of the locking screw 19 can of course be varied.
- the threads of the shaft 6 can instead also be disposed in the means of attachment of the first clamping plate 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Materials For Medical Uses (AREA)
- Surgical Instruments (AREA)
Abstract
Description
- This invention relates to a grinding jig for knives in accordance with the preamble for claim 1. It is for instance intended for use with grinding machines provided with grindstones and equipped with a fixed support of the type described in Swedish application 8306325-5.
- It is not so easy to grind knives on a grindstone. A great deal of practice is required to hold the knife steadily against the stone in order to obtain an even grinding phase and the best sharpness. Moreover, there is a great risk for the knife cutting in the stone.
- Besides, the knives are different not only in respect of length and width but also in form which can be quite straight to more or less bent. Further more, the thickness of the knives varies and they have different cross-sectional forms. Last but not least important is that the knives have different edge angles due to different uses.
- Thus, said Swedish application teaches a grinding jig or universal carrier for knives which partly make the grinding work with knives easier. However, it is not possible to use the known carrier with the great number of varying forms of knives touched upon above. By the present invention, as it is apparent from the characterizing portions of the claims, it is however possible to adjust and move the knife edge across the grindstone by means of a carrier or grinding jig so that the best possible results are obtained, independently of the form of the knife and the knife edge. The grinding jig of the invention also allows an unexperienced person to grind all types of knives easily and quickly.
- The invention will be described in greater detail in the form of an example with reference to the draw ing, wherein Fig. 1 shows a grinding jig according to the invention in section and in a position for grinding a knife, Fig. 2 is a lateral view of the grinding jig in section, fig. 3 shows the grinding jig turned 90° relative to Fig. 2 and fig. 4 shows a section of the grinding jig as seen in a direction transversely to the length of the knife-blade.
- In Fig. 1 1 designates the grindig stone. 2 designates a support in the form of a clamp fixedly secured to the grinding machine and having an arm 3 extending in parallel with the axle of the grindstone. The grinding machine with support and arm is known per se and is not part of the invention, and therefore this will not be described more closely but it is referred in this connection to said Swedish application 8306325-5.
- The grinding jig consists of a first clamping plate 4 and a
second clamping plate 5 as well as a shaft 6 circular in section and fixedly secured to the first clamping plate. This shaft is threaded along part of the end 7 turned away from the first clamping plate 4. This extends in a bore 8 made in ahandle 9 which in turn is provided with a radially extendingstop 10, in this case in the form of a collar. The bore 8 can either be completely threaded or have a threadedinset 11 fixed to thehandle 9, as shown on the drawing. - In Fig. 3 an example of the embodiment of the
clamping plate 5 as seen in a top plane view is shown, and it is to be understood that the clamping plate 4 has the corresponding form except for the means ofattachment 12 of the shaft 6. Theclamping plates 4 and 5 are mounted to each other by means of ascrew 13, which in the example shown extends through theclamping plate 5 and is screwed into the threads of a busing 14 attached to the clamping plate 4. The head of thescrew 13 has a partly spherical inside which rests in a corresponding partly spherical seat of theclamping plate 5. The distance between theplates 4 and 5 can be optionally adjusted by the aid of thescrew 13 in dependence on the thickness of theknife 15 to be ground. Thanks to the partly spherical form of the inside of the screw head and its cooperating seat of theclamping plate 5 the plates can place themselves obliquely relative to each other and consequently adapt themselves to various forms of knives. - It is shown clearly in Fig. 4 how the
clamping plates 4 and 5 have adapted themselves to a knife with ablade 15 tapering towards the point. The clamping plate is further provided with a threadedhole 16, in the example shown made in abushing 17 attached to the clamping plate. Ascrew 19 provided with awheel 18 engages the threads in the threadedhole 16 and bears with its free end on the clamping plate 4. In comparison with the edge portions ofclamping plates 4 and 5 engaging the knife the threadedhole 16 is arranged on the other side of thescrew 13 and, more specifically, at a distance from this being greater than the distance between the edge portions and thescrew 13. By screwing thelocking screw 19 towards the clamping plate 4 the screw will tend to turn the plates from each other with thescrew 13 as turning point and lock aknife 15 arranged between the edge portions of theclamping plates 4 and 5. It is possible to obtain very great locking forces for the knife by this "lever principle". - In order to guide the
plates 4 and 5 relative to each other in a simple way a pair of guide pins 20 - see Fig. 4 - are attached to theplate 5. Thepins 20 extend freely movably through the corresponding openings in the plate 4. Moreover, ahelical compression spring 21 is arranged around therespective pin 20 and between theplates 4 and 5. Thesprings 21 tend automatically to separate theplates 4 and 5 from each other which makes it easier to adapt the knife between the edge portions of the plates. - By adjusting the
screw 13 the jig can be adapted to the thickness of the current knife and the knife is clamped in the jig when thelocking screw 19 is tightened. Theclamping plates 4 and 5 will thus adapt themselves automatically to the form of the relative knife independently whether this is conical in cross-section or in longitunidal direction. The knife is locked in the jig and both sides of the knife edge can be ground by simply turning the jig 180°. A low built-in type of adjustingscrew 13 andlocking screw 18 allows grinding of small edge angles (cf. Fig. 1). - At grinding the
stop 10 of thehandle 9 is held so that is will rest against the arm 3, as swown in Fig. 1, and the distance to the stone is constant all the time, an exact grinding angle being obtained in this way. By turning thehandle 9 the distance between stop and knife edge can be changed meaning that different edge angles can be adjusted. It is possible by means of the invention to adjust this edge angle rapidly in the grinding operation, also. - By the embodiment of the
clamping plates 4 and 5 it is possible also to grind thin knives, so-called fillet knives, which are easily bent at grinding by hand. The thin knife is stiffened up effectively by means of the invention and can be ground with precision. - It is to be understood that the grinding jig can be varied in several ways within the scope of the invention and the placement of the
locking screw 19 can of course be varied. The threads of the shaft 6 can instead also be disposed in the means of attachment of the first clamping plate 4.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86850280T ATE77781T1 (en) | 1985-09-02 | 1986-08-27 | JIG FOR GRINDING KNIVES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8504072 | 1985-09-02 | ||
SE8504072A SE450696B (en) | 1985-09-02 | 1985-09-02 | KNIFE GRIPFIX |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0214943A2 true EP0214943A2 (en) | 1987-03-18 |
EP0214943A3 EP0214943A3 (en) | 1989-08-30 |
EP0214943B1 EP0214943B1 (en) | 1992-07-01 |
Family
ID=20361267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86850280A Expired EP0214943B1 (en) | 1985-09-02 | 1986-08-27 | Grinding jig for knives |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0214943B1 (en) |
AT (1) | ATE77781T1 (en) |
DE (1) | DE3685864T2 (en) |
SE (1) | SE450696B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278560A (en) * | 1993-06-01 | 1994-12-07 | Richard Peter Scott | Grinding jig |
WO1997033717A1 (en) * | 1996-03-15 | 1997-09-18 | Helge Lien | Grinding jig for knives |
KR101281531B1 (en) * | 2012-02-14 | 2013-07-03 | 원텍 주식회사 | Medical laser delivery device |
EP2660005A3 (en) * | 2012-05-03 | 2014-11-26 | Tormek AB | A knife jig assembly |
JP6246873B1 (en) * | 2016-08-03 | 2017-12-13 | 森 正明 | Kitchen knife polishing system |
EP3722047A1 (en) * | 2019-04-05 | 2020-10-14 | Tormek AB | A grinding jig for a blade tool |
US11628536B2 (en) | 2019-04-05 | 2023-04-18 | Tormek Ab | Arrangement for grinding edged tools |
SE2250020A1 (en) * | 2022-01-14 | 2023-07-15 | Tormek Ab | A precision grinding jig and a grinding system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE2250303A1 (en) | 2022-03-07 | 2023-03-07 | Tormek Ab | A grinding angle setting device, a grinding system and a method of setting a grinding angle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2154999A (en) * | 1936-05-21 | 1939-04-18 | American Type Founders Inc | Composing room saw |
US2637145A (en) * | 1949-11-12 | 1953-05-05 | Ralph L Burke | Machine for forming arcuate contours |
FR1182060A (en) * | 1957-09-06 | 1959-06-22 | Device for sharpening sharp tools and tool blades, especially for woodworking | |
US3885352A (en) * | 1974-07-19 | 1975-05-27 | John R Juranitch | Sharpening machine |
US4338749A (en) * | 1980-07-21 | 1982-07-13 | Kiser Robert E | Toolholder |
EP0249588A1 (en) * | 1986-05-13 | 1987-12-16 | Tormek AB | Grinding device for grinding scissors |
-
1985
- 1985-09-02 SE SE8504072A patent/SE450696B/en not_active IP Right Cessation
-
1986
- 1986-08-27 DE DE8686850280T patent/DE3685864T2/en not_active Expired - Lifetime
- 1986-08-27 AT AT86850280T patent/ATE77781T1/en active
- 1986-08-27 EP EP86850280A patent/EP0214943B1/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2154999A (en) * | 1936-05-21 | 1939-04-18 | American Type Founders Inc | Composing room saw |
US2637145A (en) * | 1949-11-12 | 1953-05-05 | Ralph L Burke | Machine for forming arcuate contours |
FR1182060A (en) * | 1957-09-06 | 1959-06-22 | Device for sharpening sharp tools and tool blades, especially for woodworking | |
US3885352A (en) * | 1974-07-19 | 1975-05-27 | John R Juranitch | Sharpening machine |
US4338749A (en) * | 1980-07-21 | 1982-07-13 | Kiser Robert E | Toolholder |
EP0249588A1 (en) * | 1986-05-13 | 1987-12-16 | Tormek AB | Grinding device for grinding scissors |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278560A (en) * | 1993-06-01 | 1994-12-07 | Richard Peter Scott | Grinding jig |
WO1997033717A1 (en) * | 1996-03-15 | 1997-09-18 | Helge Lien | Grinding jig for knives |
KR101281531B1 (en) * | 2012-02-14 | 2013-07-03 | 원텍 주식회사 | Medical laser delivery device |
EP2660005A3 (en) * | 2012-05-03 | 2014-11-26 | Tormek AB | A knife jig assembly |
US9186767B2 (en) | 2012-05-03 | 2015-11-17 | Tormek Ab | Knife jig assembly |
JP6246873B1 (en) * | 2016-08-03 | 2017-12-13 | 森 正明 | Kitchen knife polishing system |
EP3722047A1 (en) * | 2019-04-05 | 2020-10-14 | Tormek AB | A grinding jig for a blade tool |
EP3915725A1 (en) * | 2019-04-05 | 2021-12-01 | Tormek AB | A grinding jig for a knife |
US11517998B2 (en) | 2019-04-05 | 2022-12-06 | Tormek Ab | Grinding jig for a blade tool |
US11628536B2 (en) | 2019-04-05 | 2023-04-18 | Tormek Ab | Arrangement for grinding edged tools |
US11833639B2 (en) | 2019-04-05 | 2023-12-05 | Tormek Ab | Arrangement for grinding edged tools |
SE2250020A1 (en) * | 2022-01-14 | 2023-07-15 | Tormek Ab | A precision grinding jig and a grinding system |
SE545979C2 (en) * | 2022-01-14 | 2024-04-02 | Tormek Ab | A precision grinding jig for holding a blade and a grinding system comprising the grinding jig |
Also Published As
Publication number | Publication date |
---|---|
SE8504072D0 (en) | 1985-09-02 |
DE3685864T2 (en) | 1993-02-25 |
EP0214943B1 (en) | 1992-07-01 |
DE3685864D1 (en) | 1992-08-06 |
SE8504072L (en) | 1987-03-03 |
EP0214943A3 (en) | 1989-08-30 |
SE450696B (en) | 1987-07-20 |
ATE77781T1 (en) | 1992-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5431068A (en) | Blade sharpener | |
EP1987916B1 (en) | A grinding machine and a grinding jig therefore | |
US4817480A (en) | Knife sharpener | |
US20050183545A1 (en) | Cutting chain grinder and method of grinding | |
EP0214943A2 (en) | Grinding jig for knives | |
CA2518450A1 (en) | Honing guide assembly | |
US20100203808A1 (en) | Lathe gouge sharpening tool | |
CA1192749A (en) | Chain-saw chain sharpening device | |
US7530173B2 (en) | Variable cutting angle hand plane | |
US5301473A (en) | Grinding apparatus comprising a tool holding jig | |
DE3608301A1 (en) | Jigsaw with a machine housing which can be guided manually | |
US4532736A (en) | Sharpening device | |
US7666067B2 (en) | Method and device for sharpening a cutting tool | |
EP3059048A2 (en) | Adjustable grinding jig | |
US2549147A (en) | Portable knife grinder for woodworking machines | |
EP0225806A2 (en) | Tool holder | |
US2368225A (en) | Utility tooth rest | |
EP0249588A1 (en) | Grinding device for grinding scissors | |
CA2075864A1 (en) | Sharpener for circular saws | |
US5090160A (en) | Planer blade sharpening apparatus | |
US2944376A (en) | Grinder attachment for woodworking machines | |
JPS629003B2 (en) | ||
US20040074098A1 (en) | Cabinet scraper with handles | |
US20050239384A1 (en) | Reshaping fixture for carbide inserts | |
EP0804320A1 (en) | Hand-held power planer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE FR GB IT LI NL |
|
17P | Request for examination filed |
Effective date: 19870918 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LI NL |
|
17Q | First examination report despatched |
Effective date: 19910517 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19920701 |
|
REF | Corresponds to: |
Ref document number: 77781 Country of ref document: AT Date of ref document: 19920715 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3685864 Country of ref document: DE Date of ref document: 19920806 |
|
ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19950829 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19950830 Year of fee payment: 10 Ref country code: NL Payment date: 19950830 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19960827 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Effective date: 19960831 Ref country code: LI Effective date: 19960831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970301 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970301 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20050809 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050824 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20050825 Year of fee payment: 20 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050827 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20060826 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 |