[go: up one dir, main page]

WO2008137697A1 - Dispositif de fixation pour maintenir un matériau de type feuille - Google Patents

Dispositif de fixation pour maintenir un matériau de type feuille Download PDF

Info

Publication number
WO2008137697A1
WO2008137697A1 PCT/US2008/062443 US2008062443W WO2008137697A1 WO 2008137697 A1 WO2008137697 A1 WO 2008137697A1 US 2008062443 W US2008062443 W US 2008062443W WO 2008137697 A1 WO2008137697 A1 WO 2008137697A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet type
type material
bristle
cutting
brush
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.)
Ceased
Application number
PCT/US2008/062443
Other languages
English (en)
Inventor
Darryl C. Stein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gerber Scientific Inc
Original Assignee
Gerber Technology Inc
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 Gerber Technology Inc filed Critical Gerber Technology Inc
Publication of WO2008137697A1 publication Critical patent/WO2008137697A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces

Definitions

  • the present invention relates in general to the fixturing of flexible sheet type materials such as leather for shape cutting on a computer controlled cutting table.
  • Computer controlled cutting tables are well known machines for cutting shapes from flexible sheet type work materials such as leather, foam and fabric, and are commonly used in the manufacture of clothing, upholstery and composites. Cutting is typically done by a knife that is computer controlled in the plane of the cutting table to follow the outline of the desired shapes. The knife may either reciprocate or drag.
  • the flexible sheet work material is typically partially fixtured to the cutting table using vacuum. However, flexible materials held by vacuum are often easily disturbed. If counter measures are not taken, the cutting forces generated by the knife will usually locally break the vacuum hold, and shapes will be cut inaccurately.
  • a presser foot is commonly used in conjunction with vacuum fixturing to reduce disturbance, and is a component that provides a surface that presses down on the flexible sheet work material in the immediate area surrounding the knife. However, the presser foot rubs against the material, and this generates a friction force that disturbs it, but to a lesser extent than the knife alone.
  • An object of the invention is to eliminate the need for the overlay film in a cutting apparatus for sheet type material while having an apparatus that is tolerant of height variations in the flexible sheet work material.
  • Another object of the invention is to allow the cutting of the sheet type material closest to the edge or on the edge of the sheet type material without the sheet type material rolling or bunching up.
  • Another object of the invention is to allow the use of a fixturing device to hold down material of any type device that generates friction across the material and causes the material to undesirably roll or bunch up.
  • FIG. 1 is a partial front view of the prior art, and is of an apparatus for knife cutting of flexible material.
  • FIG. 2 is a partial front view of the prior art, and shows an apparatus that helps prevent the disturbance shown in FIG. 1.
  • FIG. 3 is a partial front view showing the preferred embodiment of the invention.
  • FIG. 4 is a bottom view of the preferred embodiment of the invention.
  • a device for use with sheet type material provides the elimination of the need for the overlay film in a cutting apparatus for sheet type material while having an apparatus that is tolerant of height variations in the flexible sheet work material.
  • the device comprising a conforming material disposed about a movable arm of the apparatus.
  • the conforming material can be any type of soft material, such as soft bristles comprised of fine diameter filaments of nylon, which offer the benefits of excellent bend recovery and abrasion resistance.
  • the material can be a solitary unit or comprise of many units such as in the soft bristles form of a brush.
  • the device can be of any geometrical shape such as a circle square, rectangle or triangle or any other shape desirable to the application. [0018] During operation the device produce axial forces in such a way as to resist the material from rolling up or bunching up when the device is moved over the sheet type material. The device also allows a cutting apparatus to cut close to the edge or on the edge of the sheet type material without having the material roll or bunch up.
  • Figure 1 shows a prior art device disturbing a flexible sheet work material.
  • the disturbance is manifested as a wave (see reference numeral 8) in front of the moving presser foot.
  • Such waves most frequently occur near the edges of the flexible sheet work material.
  • One prior art method for preventing such disturbances is to place an overlay film, which is usually a thin (e.g., .001 inches thick) sheet of plastic, over the edges of the flexible sheet work material. This increases the vacuum hold down about the edges.
  • the overlay film is consumed in the cutting process, and is therefore undesirable because it adds cost to the process and causes waste.
  • Figure 2 shows another example of prior art.
  • This apparatus is like the one in Figure 1 but adds a large flat ring of rigid material that ideally distributes a light uniform force to a large area surrounding the knife.
  • some flexible sheet work materials particularly natural leather, are not of uniform thickness.
  • these materials can have irregularities such as wrinkles that form large and sudden height variations, and these render the apparatus of Figure 2 ineffective.
  • the present invention eliminates the need for the overlay film while having an apparatus that is tolerant of height variations in the flexible sheet work material.
  • Brush 9 is not so limited to being a brush, although in its preferred embodiment brush 9 contains at least one bristle, bristles are not the only embodiment. It is within the scope of the invention for brush 9 to include materials that function similarly to that of bristles. The advantage found for having bristles in brush 9 is that any irregularities are easily compensated for in the material being cut and bristles tend to have better wear resistance properties than a solid material.
  • the work surface 1 is typically the air permeable surface of a vacuum table, although not so limited to such a surface, and is used to vacuum fixture a flexible sheet work material 2.
  • the combination of the brush 9, and elements just cited yield an unexpected result of eliminating the need for an overlay film.
  • Overlay film as previously recited is typically needed with the prior art shown in FIG. 1.
  • the brush 9, depending on the embodiment, is comprised of a rigid backing plate 20, a conforming material 10, and a means to couple the brush 9 to surround and follow the knife 3.
  • the coupling means may be comprised of a first annular groove 11 in the presser foot 7, a second annular groove 13 in the backing plate 20, and a torus shaped spring 12.
  • the brush 9 preferably has a ring shape such to produce a symmetrical region of hold down pressure about the knife.
  • the conforming material 10 may consist of a plurality of soft bristles, or other pliable material such as foam or sponge that would conform to height variations of the flexible sheet work material 2.
  • the conforming material 10 are soft bristles comprised of fine diameter filaments of nylon, which offer the benefits of excellent bend recovery and abrasion resistance.
  • One example of a conforming material 10 that is in the right range of softness to be suitable for many cutting applications including the cutting of natural leather hides has an overall diameter of nominally 4.25 inches and has bristles of .004 inch diameter nylon filaments that are nominally 0.625 inches long and extend nominally 0.015 inches below the presser foot 7. These bristle groups are spaced about 0.25 inches apart and are secured in 0.156-inch diameter tuft holes using standard brush- manufacturing techniques.
  • the conforming material 10 should have as a property a low coefficient of friction to minimize the traction force generated when it rubs against the flexible sheet work material 2. A coating or laminate layer may be added to the conforming material 10 to decrease the coefficient of friction.
  • the conforming material 10 may be comprised of open-cell polyurethane foam and to which may be bonded a thin flexible laminate of Teflon® (Dupont's trademark for polytetrafluoroethylene) or other low friction material to decrease the coefficient of friction where it contacts the flexible sheet work material 2.
  • Teflon® Dens trademark for polytetrafluoroethylene
  • Other variations of the invention are possible.
  • the presser foot 7 may be eliminated by contracting the inner diameter 15 of the brush 9 to closely surround the knife 3.
  • the work surface 1 need not be part of a vacuum table; for example, a tacky substance may be used instead. In some applications gravity and friction may provide sufficient hold down.
  • the work surface 1 need not be planer; it could have the shape of a drum or any other shape, and cutting would be done on its cylindrical surface.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un dispositif destiné à être utilisé avec un matériau de type feuille, permettant de supprimer la nécessité du film de recouvrement dans un appareil de découpe pour matériau, tout en ayant un appareil qui est tolérant par rapport aux variations de hauteur du matériau de feuille à usiner souple. Dans un appareil pour découper des pièces de motif, ou dans tout appareil qui nécessite que le matériau soit maintenu en place, le dispositif comprenant un matériau de conformation. Selon un mode de réalisation, le matériau de conformation est une pluralité de poils de nylon souple. Le matériau de conformation peut être une unité en un seul bloc ou être constitué de nombreuses unités comme sous la forme des poils souples d'une brosse. Le dispositif peut avoir une forme géométrique quelconque en fonction de l'application. En fonctionnement, le dispositif produit des forces axiales de manière à empêcher le matériau de remonter ou de s'amonceler. Le dispositif permet également de couper près du bord ou sur le bord du matériau.
PCT/US2008/062443 2007-05-04 2008-05-02 Dispositif de fixation pour maintenir un matériau de type feuille Ceased WO2008137697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91616707P 2007-05-04 2007-05-04
US60/916,167 2007-05-04

Publications (1)

Publication Number Publication Date
WO2008137697A1 true WO2008137697A1 (fr) 2008-11-13

Family

ID=39939637

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/062443 Ceased WO2008137697A1 (fr) 2007-05-04 2008-05-02 Dispositif de fixation pour maintenir un matériau de type feuille

Country Status (2)

Country Link
US (1) US20080273951A1 (fr)
WO (1) WO2008137697A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103008778A (zh) * 2011-09-28 2013-04-03 上海双明光学科技有限公司 一种抛光皮用开槽设备
JP2013193193A (ja) * 2012-03-22 2013-09-30 Brother Industries Ltd 切断装置
ES2540377B1 (es) * 2013-12-05 2016-04-21 Tkt Brainpower Engineering, S.L. Dispositivo de corte para material flexible
US20160230238A1 (en) * 2014-10-16 2016-08-11 L. Ronnie Nettles Leather Lace Beveling Apparatus and Method
FR3037271B1 (fr) 2015-06-12 2018-01-12 Centre Technique Des Industries Mecaniques Installation de decoupe de couche mince de materiau synthetique
CN108972706A (zh) * 2018-06-26 2018-12-11 郑州默尔电子信息技术有限公司 一种电子产品外壳生产用方便收集废料的穿孔装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442222A (en) * 1947-02-18 1948-05-25 Frederick J Uccellini Presser foot
US4700598A (en) * 1981-07-20 1987-10-20 Gerber Scientific, Inc. Method for working on woven fabric wound on a supply roll
US5908595A (en) * 1993-08-09 1999-06-01 Saint-Gobain Vitrage Process of and apparatus for extruding a polymer frame onto a plate-shaped object
US6670034B2 (en) * 2001-10-18 2003-12-30 Shakespeare Company, Llc Single ingredient, multi-structural filaments
US6748836B2 (en) * 1998-01-15 2004-06-15 Gerber Technology, Inc. Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials
US20060048324A1 (en) * 2004-04-09 2006-03-09 Manufacture Des Brosses Du Marais Poitevin Mbmp Process for manufacturing bristles for a vehicle washing brush, bristles obtained by this process and brushes made with said bristles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442222A (en) * 1947-02-18 1948-05-25 Frederick J Uccellini Presser foot
US4700598A (en) * 1981-07-20 1987-10-20 Gerber Scientific, Inc. Method for working on woven fabric wound on a supply roll
US5908595A (en) * 1993-08-09 1999-06-01 Saint-Gobain Vitrage Process of and apparatus for extruding a polymer frame onto a plate-shaped object
US6748836B2 (en) * 1998-01-15 2004-06-15 Gerber Technology, Inc. Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials
US6670034B2 (en) * 2001-10-18 2003-12-30 Shakespeare Company, Llc Single ingredient, multi-structural filaments
US20060048324A1 (en) * 2004-04-09 2006-03-09 Manufacture Des Brosses Du Marais Poitevin Mbmp Process for manufacturing bristles for a vehicle washing brush, bristles obtained by this process and brushes made with said bristles

Also Published As

Publication number Publication date
US20080273951A1 (en) 2008-11-06

Similar Documents

Publication Publication Date Title
US20080273951A1 (en) Fixturing Device for Holding Sheet Type Material
US3765289A (en) Vacuum hold-down apparatus
JPH01117900U (fr)
WO2007101008A2 (fr) Affuteurs de couteaux munis de guide-couteaux ameliores
JPH021640B2 (fr)
EP1802424B1 (fr) Tampon lustreur a flexibilite amelioree et face de polissage remplaçable
EP3386694A2 (fr) Appareil et procédé de découpage à l'emporte-pièce
MX2013013569A (es) Dispositivo, sistema y metodo de lijadora de patron.
WO2007100993A2 (fr) Procede et systeme d'affutage de couteau
US7997544B2 (en) Movable hand/wrist support for use with a computer mouse
EP3152002A2 (fr) Outil abrasif pour usinage de surfaces
UA88803C2 (ru) Способ ухода за поверхностями пола
ES463359A1 (es) Procedimiento de obtencion o fabricacion de vellones no te- jidos de superficie lisa.
US10328579B2 (en) Unit for cutting thin films of synthetic material
CN216164349U (zh) 猫指甲的研磨和磨削器
US5505108A (en) Cutting knife and sharpener for automatic machines for cutting cloth and similar sheet materials
EP2948280A1 (fr) Dispositif de maintien de matériaux synthétiques multicouches sur des tables de découpe et autres
JP4231010B2 (ja) 研磨装置
CN219385750U (zh) 一种超声波裁剪设备
CN218203562U (zh) 一种无纺布加工用裁切装置
US3853027A (en) Apparatus for cutting resilient porous material
WO1999007518A1 (fr) Systeme de tampons d'aplanissement et de polissage variables en continu
US2527116A (en) Floor mat
CN215289333U (zh) 一种合成革的压纹装置
US2840835A (en) Roughing machine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08747519

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08747519

Country of ref document: EP

Kind code of ref document: A1