EP0942812B1 - Scissors - Google Patents
Scissors Download PDFInfo
- Publication number
- EP0942812B1 EP0942812B1 EP96928512A EP96928512A EP0942812B1 EP 0942812 B1 EP0942812 B1 EP 0942812B1 EP 96928512 A EP96928512 A EP 96928512A EP 96928512 A EP96928512 A EP 96928512A EP 0942812 B1 EP0942812 B1 EP 0942812B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- scissors
- blade
- cutting edge
- pair
- blades
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
- B26B29/04—Guards or sheaths for scissors, e.g. combined with manicuring appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B13/00—Hand shears; Scissors
- B26B13/06—Hand shears; Scissors characterised by the shape of the blades
Definitions
- This invention relates to scissors which reduce the risk of the user cutting themselves.
- a particular problem is encountered during the production of synthetic filaments e.g. nylon or polypropylene, during which production the filament must be cut.
- a person grasping the filament with one hand and attempting to cut the filament with a pair of scissors in the other hand, as is common practice, is in great danger of inadvertently cutting their hand with the scissors because of the great speed of the filament.
- the speed of the filament may cause the filament to "snatch" the conventional scissors out of the user's grasp, leading to danger of cutting the user, particularly as the user must be quite nimble in order to cut the filament to a required length before too much filament passes by.
- a strip of such a material is continuously fed from a hot roller, the strip having a width of a few metres. If the production process down-line of the roller is stopped for any reason, because the roller is heated, it is more efficient to keep the roller running, and producing material, than to shut down the roller. The plastics sheet material coming off the roller, must be quickly cut, as it comes off the roller and then removed in order to avoid a build up of excess sheet material.
- US 5 379 521 discloses a pair of scissors having guard portions on its blades.
- EP 584 488 discloses safety scissors having blade guards with multiple protrusions.
- a pair of scissors comprising:
- the provision of the guard portion may allow the blade to cut a thin flexible sheet material or compressible material, (e.g. threads or paper) which can deform around the guard portion, whilst thicker objects such as fingers may be protected from the cutting edge because the thicker object cannot deform around the guard portion.
- a thin flexible sheet material or compressible material e.g. threads or paper
- a said guard portion projects beyond the cutting edge in a direction of cut of the blade.
- the first blade comprises a first cutting edge at one end of the first blade, and a first handle portion at an opposite end of the first blade
- the second blade member comprises a second cutting edge at one end of the second blade and the second handle portion at an opposite end of the second blade.
- the first blade is provided with a first guard portion
- the second blade is provided with a second guard portion
- first and second blades are pivotally connected to each other so that the first and second cutting edges can engage each other in a shearing motion.
- Adjacent guard portions on adjacent blades may be sufficiently close together that an operator cannot inadvertently put part of their body between the guard portions and hence between the blades.
- a said guard portion may be elongate, and may have a main length which may run substantially parallel to the corresponding cutting edge.
- the guard portion may extend continuously along the cutting edge of the blade.
- the guard portion may have a rounded profile which extends forward of the cutting edge in a direction of cut of the blade, which profile, in use, will not penetrate human skin.
- the guard portion may comprise a separate guard member which is attachable to the blade.
- the guard portion may comprise a plastics strip.
- the guard portion may be attached to the blade such that it is tamperproof and can only be removed with difficulty.
- the guard portion may be attached to the blade with rivets.
- the rivets may be hot-staked. This may prevent users removing the guards, to use the pair of scissors for example, to unscrew screws.
- a said cutting edge may be defined at an intersection of a side face of the respective blade and a back face of the blade.
- a blade angle defined between said side face and said back face in a plane perpendicular to a tangent of the cutting edge may be in the range 40° to 90°.
- the blade angle, when adapted for cutting textile material may be in the range 60° to 90°.
- the blade angle when adapted for cutting a sheet material, e.g. paper, card or the like, may be in the range 75° to 90°. An angle of around 90° has been formed to give adequate cutting performance on sheet material, whilst giving the best safety.
- the cutting edges of the blades may be arranged for minimum deformation of the material being cut by having a blade angle not substantially deviating from 90°.
- blade angles in the range 70° to 90° give good performance in cutting sheet material and textile materials.
- the blades which are arranged for minimum deformation of the material being cut, may be reinforced by the elongate guard portions attached to each blade.
- the catching means may be arranged to allow the thread to be captured and released quickly.
- the hook is provided on a said one end of a said blade.
- a user may quickly catch a fast moving thread using the hook, and cut the thread between the blades.
- the provision of the elongate guard portions which extend beyond the blades in a direction of cut of the blades, may prevent the blades cutting skin, fingers or the like which may be in the vicinity of the blades.
- the moving thread may slide over the guard portions, which may be of a low friction material such as nylon, hereby reducing the risk of the moving thread catching the blades and snatching the tool out of the user's hand.
- the guard portions may be arranged for fitting retrospectively to a pair of prior art scissors.
- the hook may comprise a further cutting edge positioned substantially between the arcuate portion of the hook, and the lower part of the blade from which the arcuate portion extends.
- the further cutting edge preferably comprises a ground cutting edge.
- the further cutting edge is preferably positioned such that it is protected by an overhanging portion of the arcuate portion.
- the overhanging portion may extend along the lower edge of the blade, spaced apart therefrom, and forming a channel between the overhanging portion and the lower edge such that, in use, a material to be cut may be guided along the channel and towards the further cutting edge.
- the cutting edge is preferably provided at a closed off end of the channel, at which position the further cutting edge is protected by the overhanging portion from being contacted by a finger or the like.
- the provision of the hook portion on the lower edge of the tool, and the guiding action between the overhanging portion and the lower edge of the blade may enable use of the pair of scissors as a knife, for quickly cutting a large expanse of sheet material.
- a dual purpose cutting tool for cutting sheet material in scissor like manner, whilst enabling quick cutting of an expanse of sheet material by pulling the pair of scissors in a rearward direction towards its handles , the sheet material being guided by the overhanging portion and the lower edge of the blade towards the further cutting edge.
- the cutting edges and the further cutting edge are each protected by a guard portion or the overhanging portion as appropriate, there is minimal risk of injury in using such a pair of scissors, even where cutting actions need to be made relatively quickly.
- a pair of safety scissors comprises two plastic guard strips 10, one attached to each blade 11 of the scissors.
- the guard strips 10 have a profile (best seen in Figure 2) which matches the outer face 12 of each blade 11.
- a leading edge 13 of each guard strip 10 has a rounded cross-section which is forward of the cutting edge 14 of each blade 11 in a direction of cut of the blade, being vertical as shown in Figure 2.
- each blade is formed at the intersection of a side face 30 of the blade, which is substantially parallel to a direction of cut, and a back face 31 of the blade which is transverse to the direction of cut.
- a cutting angle 18 of the blades 11 is selected depending on the material with which it is intended to use the scissors.
- Safety scissors for cutting sheet material or textile material optionally have a cutting angle 18 with range 70° to 90°.
- the safety scissors are ideally, but not exclusively, used for cutting thin flexible materials.
- the cutting edges 14 of the blades 11 are preceded by the leading edges 13 of the guard strips 10.
- the two guard strips 10 have a narrow gap 19 between them.
- the combination of the leading edges 13 preceding the cutting edges 14 and the narrow gap 19 between the guard strips 10 has the effect of allowing only thin flexible material to come between the cutting edges and so be cut.
- This safety aspect is particularly desirable when used with machines which produce synthetic fibres. Such machines can issue fibre at speeds of 30 ms -1 .
- Such machines can issue fibre at speeds of 30 ms -1 .
- This task is usually done with conventional scissors or a knife.
- the use of either conventional scissors or a knife often leads to the user cutting themselves.
- a user must grasp the fibre as it is moving at great speed before it can cut.
- Attempting to maintain some tension in the fibre to use the knife or scissors is very difficult and requires very good coordination of the hands a lack of which results in the user cutting themselves. It is in this situation that the safety features of the present safety scissors herein described are particularly useful.
- a second set of scissors according to an embodiment of the invention, shown in Figure 4, has the same guard strips 10 attached to the scissor blades 11 in the same manner as described above.
- the hook 20 is used to snare a fibre issuing from a machine as described in the first embodiment.
- the use of the hook considerably simplifies the operation of cutting a fibre described.
- the fibre can be pulled forcefully from the machine and with a sharp movement the fibre can be cut by releasing the fibre from the hook 20 and thrusting the scissors forwards over the fibre and cutting in the usual way.
- the benefits of the hook 20 are that the fibre can be cut much more simply and with less need to repeat the operation when the fibre is dropped or missed with the scissors.
- FIG. 6 of the accompanying drawings there is shown the blades of the second set of scissors in use in cutting a large expanse of sheet material 30.
- the blades are in a closed position, and the cutting action of the sheet material is provided by a further cutting edge 31 provided at an intersection of a lower edge of one of the blades, and the arcuate hook portion 20.
- the further cutting edge 31 comprises a ground edge of substantially arcuate form.
- the hook portion 20 comprises an overhanging portion 32 which extends between the tip of the blade, distal from the handle end, backwardly toward the handle end.
- the guard portion forms a blunt rounded feature which protects large objects, such as fingers, skin etc from encountering the further blade 31.
- the overhanging portion forms a channel 32 between the overhanging portion and the lower edge of the blade, through which the sheet material is guided, as the blade is drawn along the sheet material in a direction towards the handle portion of the scissors.
- the second set of scissors may perform a dual function of being able to cut sheet material in scissor-like manner between the first and second cutting edges on the first and second blades, or also for very quick cutting of the sheet material, being able to be drawn along the sheet material using the further cutting edge 31 to cut through the sheet material, the further cutting edge 31 being guided through the sheet material by the overhanging portion 32 of the hook.
- This is combined with the safety feature of including the elongate guards extending along the first and second cutting edges, and the overhanging hook portion which effectively protects the user from inadvertently cutting himself on the further cutting edge 31.
- a further pair of scissors is shown in Figure 6.
- the scissors are constructed and used substantially as the first pair of scissors, except as follows.
- the guard strips 10 have been modified to have a rearwardly directed protrusion 22 which is decorated to resemble a frog's eye.
- This embodiment is intended for use by children.
- the safety scissors have the attribute emphasising the necessity of the safe use of potentially dangerous equipment, whilst providing all the necessary protection as described in connection with the first pair of scissors.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Scissors And Nippers (AREA)
Description
Claims (7)
- A pair of scissors comprising:a first elongate blade (11);a second elongate blade (11);the first and second blades being movably connected to each other so that the first and second blades face oppositely each other,in which at least one of said first or second blades is provided with a cutting edge (14) and a guard portion (10) adjacent said cutting edge, and
- A pair of scissors as claimed in claim 1, wherein a said guard portion projects beyond the cutting edge in a direction of cut of the blade.
- A pair of scissors as claimed in any preceding claim, wherein the first blade is provided with a first guard portion, and the second blade is provided with a second guard portion.
- A pair of scissors as claimed in any preceding claim, wherein a said guard portion is elongate, and has a main length which runs substantially parallel to the corresponding cutting edge.
- A pair of scissors as claimed in any preceding claim, where the guard portion comprises a separate guard member which is attachable to the blade.
- A pair of scissors as claimed in any preceding claim, wherein said cutting edge is defined at an intersection of a side face (30) of the respective blade and a back face (31) of the blade and wherein a blade angle (18) defined between said side face and said back face in a plane perpendicular to a tangent of the cutting edge is in the range 40° to 90°.
- A pair of scissors according to any preceding claim, wherein the hook comprises a further cutting edge (31) positioned substantially between the arcuate portion of the hook, and the back section of the blade from which the arcuate portion extends.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9517125.2A GB9517125D0 (en) | 1995-08-22 | 1995-08-22 | Scissors |
GB9517125 | 1995-08-22 | ||
PCT/GB1996/002022 WO1997007944A1 (en) | 1995-08-22 | 1996-08-20 | Scissors |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0942812A1 EP0942812A1 (en) | 1999-09-22 |
EP0942812B1 true EP0942812B1 (en) | 2002-11-20 |
Family
ID=10779553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96928512A Expired - Lifetime EP0942812B1 (en) | 1995-08-22 | 1996-08-20 | Scissors |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0942812B1 (en) |
DE (1) | DE69624950T2 (en) |
ES (1) | ES2185795T3 (en) |
GB (1) | GB9517125D0 (en) |
WO (1) | WO1997007944A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2774935B1 (en) | 1998-02-19 | 2000-03-17 | Manuf D Articles De Precision | INTERCHANGEABLE BLADE SCISSORS |
FR2879491B1 (en) * | 2004-12-20 | 2009-02-06 | Patrick Galea | SCISSORS FOR CHILDREN |
WO2012114341A1 (en) * | 2011-02-23 | 2012-08-30 | Azriel Ashur | Safe trimming apparatus |
US20140352156A1 (en) | 2013-05-31 | 2014-12-04 | Thomas Jay LANDWEHR | Cutting hand tool |
CN104552366A (en) * | 2014-12-30 | 2015-04-29 | 济源市乐享科技有限公司 | Scissors capable of preventing accidental hand injury |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE325532C (en) * | 1920-09-14 | Alfred Grumbach | Scissors with separating hook | |
US2249378A (en) * | 1940-10-29 | 1941-07-15 | Leo Domenico Di | Bastings cutting, pulling, and removing implement |
US2557553A (en) * | 1948-12-14 | 1951-06-19 | Metzger Mortimer Irvin | Scissors |
US3325897A (en) * | 1963-12-02 | 1967-06-20 | George C Luebkeman | Safety scissors |
ES248117Y (en) * | 1980-01-10 | 1981-01-16 | SCISSORS, WITH MOLDED PENCIL SHARPENER, FOR SCHOOL STUDENTS | |
US4753009A (en) * | 1987-03-09 | 1988-06-28 | Haga Mary I | Multi-function sewing implement |
EP0543199A1 (en) * | 1991-11-12 | 1993-05-26 | Hoechst Celanese Corporation | Safety scissors |
US5297342A (en) * | 1991-11-12 | 1994-03-29 | Hoechst Celanese Corporation | Safety scissors |
US5379521A (en) * | 1994-01-25 | 1995-01-10 | Ed Kaplan Associates | Safety scissors |
-
1995
- 1995-08-22 GB GBGB9517125.2A patent/GB9517125D0/en active Pending
-
1996
- 1996-08-20 ES ES96928512T patent/ES2185795T3/en not_active Expired - Lifetime
- 1996-08-20 WO PCT/GB1996/002022 patent/WO1997007944A1/en active IP Right Grant
- 1996-08-20 EP EP96928512A patent/EP0942812B1/en not_active Expired - Lifetime
- 1996-08-20 DE DE69624950T patent/DE69624950T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1997007944A1 (en) | 1997-03-06 |
DE69624950D1 (en) | 2003-01-02 |
GB9517125D0 (en) | 1995-10-25 |
EP0942812A1 (en) | 1999-09-22 |
ES2185795T3 (en) | 2003-05-01 |
DE69624950T2 (en) | 2003-08-21 |
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