WO1997007944A1 - Ciseaux - Google Patents

Ciseaux Download PDF

Info

Publication number
WO1997007944A1
WO1997007944A1 PCT/GB1996/002022 GB9602022W WO9707944A1 WO 1997007944 A1 WO1997007944 A1 WO 1997007944A1 GB 9602022 W GB9602022 W GB 9602022W WO 9707944 A1 WO9707944 A1 WO 9707944A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
cutting edge
hand held
cutting
blades
Prior art date
Application number
PCT/GB1996/002022
Other languages
English (en)
Inventor
Jeremy Luke Ward
Original Assignee
Jeremy Luke Ward
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jeremy Luke Ward filed Critical Jeremy Luke Ward
Priority to EP96928512A priority Critical patent/EP0942812B1/fr
Priority to DE69624950T priority patent/DE69624950T2/de
Publication of WO1997007944A1 publication Critical patent/WO1997007944A1/fr

Links

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.
  • a hand held cutting tool comprising:
  • first elongate blade a first elongate blade
  • second elongate blade the first and second blades being movably connected to each other so that the first and second blades face oppositely each other, characterised in that at least one of said first or second blades is provided with a cutting edge and a guard portion adjacent said cutting edge.
  • 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 witii 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 from the tool, to use the tool 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 pe ⁇ endicular to a tangent of the cutting edge may be in the range 40° to 90°.
  • the blade angle a said tool, when adapted for cutting textile material may be in the range 60° to 90°.
  • the blade angle of a said tool 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 cutting tool may comprise a catching means which is arranged to allow the capture and retention of a moving textile thread or filament or the like, and allows the thread to be pulled into a position in which it can be cut safely whilst still moving.
  • the catching means may be arranged to allow the thread to be captured and released quickly.
  • the cutting tool may comprise a hook.
  • the hook preferably comprises an arcuate portion which extends or faces toward the handle end of the tool, enabling a thread to be drawn towards the user.
  • the hook is provided on a said one end of a said blade.
  • the arcuate portion extends from a lower part of a blade, the cutting edge being on an upper part of the 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 tool as a knife, for quickly cutting a large expanse of sheet material.
  • a dual pu ⁇ ose cutting tool for cutting sheet material in scissor like manner, whilst enabling quick cutting of an expanse of sheet material by pulling the tool in a rearward direction towards the handles of the tool, 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 tool, even where cutting actions need to be made relatively quickly.
  • Figure 1 is an exploded perspective partial view of a pair of safety scissors according to a first specific embodiment of the invention
  • Figure 2 is a cross-section through blades of the safety scissors in an open position according to a first specific embodiment of the invention
  • Figure 3 is a plan view of the safety scissors according to a first specific embodiment of the invention.
  • Figure 4 is a plan view of a second set of safety scissors according to a second embodiment of the invention
  • Figure 5 is a partial perspective view of the second set of safety scissors, in use cutting a piece of sheet material
  • Figure 6 is a plan view of a third set of safety scissors according to a third embodiment of the invention.
  • 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.
  • Matching projections 16 are inserted into the holes 15.
  • the projections 16 form rivets which are "hot-staked” with a jet of hot air which melts the plastic projections 16 which spread out into a wider portion 17 of the hole 15 and sets to secure the guard strip 10 to its blade 11.
  • 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°.
  • An angle 18 of 90° has been found optional for safety, whilst a cutting angle in the range 70° to 90° gives good cutting ability and adequate safety.
  • 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.
  • a second set of scissors according to another 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 in the previous embodiment.
  • the fibre can be pulled forcefully from the machine and with a sha ⁇ 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.
  • FIG. 6 A further embodiment of the invention is shown in Figure 6.
  • the scissors are constructed and used substantially as described in the first embodiment, 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 the first embodiment.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Abstract

Cet outil à couper à main comprend des première et seconde lames (11) de forme allongée, reliées entre elles de façon mobile, afin d'être placées l'une en face de l'autre. L'une des lames au moins est pourvue d'un bord (14) coupant ainsi que d'un élément (10) protecteur contigu au bord coupant.
PCT/GB1996/002022 1995-08-22 1996-08-20 Ciseaux WO1997007944A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96928512A EP0942812B1 (fr) 1995-08-22 1996-08-20 Ciseaux
DE69624950T DE69624950T2 (de) 1995-08-22 1996-08-20 Schere

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9517125.2A GB9517125D0 (en) 1995-08-22 1995-08-22 Scissors
GB9517125.2 1995-08-22

Publications (1)

Publication Number Publication Date
WO1997007944A1 true WO1997007944A1 (fr) 1997-03-06

Family

ID=10779553

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002022 WO1997007944A1 (fr) 1995-08-22 1996-08-20 Ciseaux

Country Status (5)

Country Link
EP (1) EP0942812B1 (fr)
DE (1) DE69624950T2 (fr)
ES (1) ES2185795T3 (fr)
GB (1) GB9517125D0 (fr)
WO (1) WO1997007944A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774935A1 (fr) 1998-02-19 1999-08-20 Manuf D Articles De Precision Ciseaux a lames interchangeables
FR2879491A1 (fr) * 2004-12-20 2006-06-23 Patrick Galea Ciseaux pour enfants
WO2012114341A1 (fr) * 2011-02-23 2012-08-30 Azriel Ashur Appareil de rognage sûr
CN104552366A (zh) * 2014-12-30 2015-04-29 济源市乐享科技有限公司 防止误伤手的剪刀

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140352156A1 (en) 2013-05-31 2014-12-04 Thomas Jay LANDWEHR Cutting hand tool

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325532C (de) * 1920-09-14 Alfred Grumbach Schere mit Trennhaken
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
GB2067476A (en) * 1980-01-10 1981-07-30 Bueno Garmendia A Combined scissors and pencil sharpener
US4753009A (en) * 1987-03-09 1988-06-28 Haga Mary I Multi-function sewing implement
EP0543199A1 (fr) * 1991-11-12 1993-05-26 Hoechst Celanese Corporation Ciseaux de sécurité
EP0584488A1 (fr) * 1992-06-29 1994-03-02 Hoechst Celanese Corporation Ciseaux de sécurité
US5379521A (en) * 1994-01-25 1995-01-10 Ed Kaplan Associates Safety scissors

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325532C (de) * 1920-09-14 Alfred Grumbach Schere mit Trennhaken
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
GB2067476A (en) * 1980-01-10 1981-07-30 Bueno Garmendia A Combined scissors and pencil sharpener
US4753009A (en) * 1987-03-09 1988-06-28 Haga Mary I Multi-function sewing implement
EP0543199A1 (fr) * 1991-11-12 1993-05-26 Hoechst Celanese Corporation Ciseaux de sécurité
EP0584488A1 (fr) * 1992-06-29 1994-03-02 Hoechst Celanese Corporation Ciseaux de sécurité
US5379521A (en) * 1994-01-25 1995-01-10 Ed Kaplan Associates Safety scissors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774935A1 (fr) 1998-02-19 1999-08-20 Manuf D Articles De Precision Ciseaux a lames interchangeables
FR2879491A1 (fr) * 2004-12-20 2006-06-23 Patrick Galea Ciseaux pour enfants
WO2012114341A1 (fr) * 2011-02-23 2012-08-30 Azriel Ashur Appareil de rognage sûr
CN104552366A (zh) * 2014-12-30 2015-04-29 济源市乐享科技有限公司 防止误伤手的剪刀

Also Published As

Publication number Publication date
ES2185795T3 (es) 2003-05-01
EP0942812A1 (fr) 1999-09-22
DE69624950T2 (de) 2003-08-21
EP0942812B1 (fr) 2002-11-20
DE69624950D1 (de) 2003-01-02
GB9517125D0 (en) 1995-10-25

Similar Documents

Publication Publication Date Title
US5386632A (en) Ergonomic utility knife/box cutter and method of making
US5485677A (en) Knife with fabric cutter
EP0886562B1 (fr) Outil de decoupe
EP0942812B1 (fr) Ciseaux
US5359778A (en) Knife with cutting hook
US5297342A (en) Safety scissors
US6493945B1 (en) Cutting tool
US20140101944A1 (en) Seam Ripper Scissors
CA2206905C (fr) Couteau pour couper des nattes d'isolant fibreux
US5539983A (en) Safety stock carton knife
US5195245A (en) Safety scissors
US4316324A (en) Auxiliary slitting blade for a cutting instrument
US5086561A (en) Safety knife and protection garment for processing operations
US6317987B1 (en) Scissor
CN208987332U (zh) 一种手枪式花椒采摘器
US5617987A (en) Safety guard for fiber processing unit
US6108913A (en) Stripping tool
KR102584943B1 (ko) 손 다침 방지용 칼
EP0543199A1 (fr) Ciseaux de sécurité
US6349472B1 (en) Cutting device
US2706070A (en) Ripping device for stitching
US7017271B1 (en) Cutting device
US2793796A (en) Thread pulling tool
US20230064784A1 (en) Cut resistant glove
WO2023239246A1 (fr) Dispositif et procédés pour couper ou trancher un objet

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): GB US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1996928512

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1996928512

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1996928512

Country of ref document: EP