EP0943545A2 - Lame de coupe pour un distributeur de ruban adhésif - Google Patents

Lame de coupe pour un distributeur de ruban adhésif Download PDF

Info

Publication number
EP0943545A2
EP0943545A2 EP99104164A EP99104164A EP0943545A2 EP 0943545 A2 EP0943545 A2 EP 0943545A2 EP 99104164 A EP99104164 A EP 99104164A EP 99104164 A EP99104164 A EP 99104164A EP 0943545 A2 EP0943545 A2 EP 0943545A2
Authority
EP
European Patent Office
Prior art keywords
dispenser
knife
tooth
tooth tips
adhesive tape
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
Application number
EP99104164A
Other languages
German (de)
English (en)
Other versions
EP0943545B1 (fr
EP0943545A3 (fr
Inventor
Bernd Dr. Lühmann
Ulrich Otten
Klaus Dr. Watchmann
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.)
Tesa SE
Original Assignee
Beiersdorf AG
Tesa SE
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 Beiersdorf AG, Tesa SE filed Critical Beiersdorf AG
Publication of EP0943545A2 publication Critical patent/EP0943545A2/fr
Publication of EP0943545A3 publication Critical patent/EP0943545A3/fr
Application granted granted Critical
Publication of EP0943545B1 publication Critical patent/EP0943545B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B65H35/0073—Details
    • B65H35/008—Arrangements or adaptations of cutting devices

Definitions

  • the invention relates to a dispenser knife for the known adhesive tape dispenser.
  • a corresponding piece of adhesive tape is cut to length and cut off with the cutting knife.
  • the shape and materials of suitable cutting knives vary. Cutting knives with a toothed cutting edge are most frequently used.
  • the toothed cutting edge can be produced by injection molding dispensers in the injection molding process (see for example tesa film dispenser 55975-87). It is also common to integrate a metal cutting knife into the dispenser. Compared to plastic tooth edges, metal knives generally offer the advantage of higher mechanical strength and greater sharpness, are therefore more durable and more flexible in terms of the materials that can be cut (for example in terms of film thickness and type).
  • the cutting knives are sufficient to achieve Sharpness optionally beveled.
  • the bevel can have a constant angle exhibit or also run round in the area of the cutting teeth.
  • dispenser knives include punching, grinding and wire EDM.
  • the tooth shape is usually generated by grinding (for example in the tesa unwinder 56210) or by wire EDM.
  • the cut is made at an acute angle of 30 ° to the cutting knife level in order to achieve sufficient knife sharpness.
  • dispenser knives manufactured using the stamping process for example, steel strip qualities K 40 and K 60 are used.
  • the punching angle is often 90 ° to the cutting knife level (i.e. runs vertically to the cutting knife level), as implemented in the tesa hand dispenser 5003, for example.
  • a stamping burr correspondingly perpendicular to the cutting plane is usually formed.
  • the cutting knives are therefore placed in the dispenser at an angle of attack of, for example, 45 ° to the film level.
  • a disadvantage of dispensers with toothed cutting knives is that, in particular, self-adhesive films which use backing materials with low tear propagation resistance and low ductility cannot be detached without tear from many adhesion reasons.
  • the knife contour teeth structure
  • the use of a is sufficient for easy cutting off sharp cutting knife.
  • the force required to cut off a piece of adhesive film increases with the film thickness and generally decreases significantly as the degree of stretching of the film decreases.
  • the tesa table dispenser 6082 uses smooth cutting knives, which enable an absolutely straight cut edge of the adhesive tape to be portioned.
  • Adhesive film strips cut to length with the tesa table dispenser 6082 which use a biaxially oriented PP carrier, for example tesa-Multi-Film or tesa-Practic-Film, can be removed without tearing in almost all cases.
  • injuries to the fingers in particular when using the aforementioned dispensers cannot be excluded.
  • US 4,175,685 describes an adhesive tape dispenser which uses a cutting unit containing a razor blade.
  • a flexible thread-like material is spirally wrapped around the knife to protect against injuries.
  • the razor blade edge is accessible between individual spiral turns.
  • a cross-cutting smooth knife integrated in a knife bar is used in the tesa industrial table dispenser 6080.
  • the special arrangement and orientation of the cutting knife underneath the knife bar largely excludes the risk of injury to the user.
  • the tesa automat 6056 also uses a knife that runs diagonally to the adhesive tape and is controlled electromagnetically. A risk of injury to the user is also largely excluded.
  • a disadvantage of the aforementioned tape dispensers with smooth, straight knife edges of high sharpness is the increased risk of injury on the cutting edges, if there is no protective cover and that for processing the adhesive film by manually removing or moving a knife protection cover additional operations are necessary.
  • Automation in the cutting process is often a cutting knife complex mechanical construction of the tape dispenser necessary, which manufacturing costs and size of the devices increased and also reduce the functionality can.
  • the object of the invention was to remedy this, in particular to provide dispenser knives for tape dispensers, which, analogous to the tooth-shaped metal or plastic knives known today, can be easily integrated into the cutting devices of dispensers of known embodiments, which produce a cut edge in the adhesive film, so that tear-free removal of applied adhesive films, in particular adhesive films with a carrier film based on mono- and biaxially oriented polypropylene, is possible, which have a high sharpness of the cutting knife for the adhesive tapes to be cut, but at the same time do not have a significantly increased risk of injury compared to classic dispenser knives with serrated knife edge, which are inexpensive to implement.
  • Self-adhesive films can be made by means of the cutting devices shown in FIG with, for example, biaxially oriented polypropylene carrier, with biaxially stretched Polyethylene terephthalate carrier, with cellulose acetate carrier with cellophane carrier or with PVC strips, to name just a few, are excellently cut.
  • a smooth to wavy Cutting edge which has no or only very small microscopic injuries in the form of sharp cuts or cracks in the longitudinal direction of the cut off adhesive tape is usually generated both if the self-adhesive film strips in the middle of the front of the cutter cut off downwards, i.e. without deflection to the left or to the right, or also with lateral deflection, i.e. cut off diagonally to the left or to the right become.
  • the low risk of injury with an otherwise very high sharpness of the blade will in the cutting device according to the invention by the two-stage material taper the cutting blade achieved.
  • the sharp protruding area of the blade is merely able to scratch the surface of the skin slightly.
  • a deeper penetration of the Teeth into the skin is prevented by the relatively obtuse angle (32) in FIG. 3.
  • galvanized or nickel-plated punchable steel strip can be used as the blade material can be used to name just a few materials.
  • Different plastics such as PS or ABS are also suitable.
  • For versions in plastic must however, generally a significantly reduced service life compared to a metal knife of the cutting knife are accepted.
  • Cutting devices for self-adhesive films according to the invention can be in one large number of dispenser types can be used. Suitable dispenser types include Table and hand-held dispensers, where the one that holds the tape roll The housing is separate from the film support and the cutting device, compact dispenser as well as transfer dispensers as previously described.
  • the adhesive strips are removed manually from the PVC primer removed. To do this, the adhesive film strips are started from a corner peeled off with your fingernail, then carefully up to half the length of the adhesive film peeled off. The adhesive film strips are on the opposite separating edge replaced in the same way. A total of 20 attempts are made to remove the 10 adhesive film strips performed. The trials are counted in which the adhesive film strips let it peel off the PVC without tearing at the cut edge.
  • the dimensions according to Figure 2 are as follows:
  • the Tooth distance (23) is 1.25 mm
  • the tooth height (24) is 0.4 mm
  • the radius of curvature in the area of the contour between two adjacent tooth tips (21) is 0.4 mm
  • the radius of curvature in the area of the tooth tips (22) is 0.13 mm.
  • Of the Angle of attack of the knife to the film (43) according to FIG. 4 is 80 °.
  • the cutting knife is beveled in the pull-off direction (42) at an angle of 45 °.
  • the height of the ridge in the area of the tooth tips (34) is approx. 0.3 mm
  • the material thickness at the base of the ridge (35) approx. 0.1 mm.
  • Self-adhesive films # 1 to # 6 with a width of 19 mm are tested for their ability to be cut off, the structure of the cut edge and tear-free detachable adhesive film strips.
  • the cutting device results a slightly wavy cut edge.
  • All of the adhesive films can be used for both Cutting off from as well as when cutting obliquely or respectively very light, the calender film based on a mixture of PE and EVAc copolymer detach easily. Almost all adhesive strips can be torn after gluing detach.
  • the adhesive films # 1 to # 3 on the with an original knife equipped tesa dispenser 5003 processed. The severing will be in all Cases as easy when cutting obliquely and as moderately difficult when cutting in the middle judged. A tear-free redetachment of glued adhesive film strips is only possible in approx. 10 to 30% of all cases.
  • tesa-Multi-Film adhesive film # 2 from example 1 is compared for cutting ability, structure of the cut edge and tear-free redetachment of glued adhesive film strips.
  • the distance between the cutting knife (14) and the film contact surface (12) is 0.5 mm.
  • the knife lies in one plane with the knife rest, d. that is, the knife height above the Film contact area be 0 mm.
  • the knife tips should not protrude more than 1 mm beyond the film support surface, otherwise a secure support the film is not realized on the film support surface.
  • the tear-free redetachment the self-adhesive film in the present example is compared to the original dispenser knife of the tesa hand dispenser 5003 (see example 1) significantly improved in all cases.
  • a tesa hand dispenser 5003 is provided with a cutting knife according to the invention in accordance with Example 1.
  • the position of the bevel (32) of the cutting knife is varied (see FIG. 3).
  • the tapered side of the knife is tested in the pulling direction and against the pulling direction of the adhesive film strip to be cut.
  • a tesa hand dispenser 5003 modified analogously to Example 1 is provided with different cutting knives.
  • the tooth cutting edges correspond to those of example 1.
  • the angle of attack of the cutting knife is varied in the direction of the adhesive film strips to be cut.
  • the easy cutting ability is given for all angles of attack.
  • the amplitude of the ripple, that is formed on the knife edge increases with the smaller angle of attack of the knife.
  • the course of the cut is clean in all cases and without damage longitudinal. All patterns can be at least 80% without tears replace.
  • tesa hand dispenser 5003 which is equipped with cutting knives according to the invention, for tear-free removal of tesa-Multi-Film.
  • Point dispenser knife with punching angles close to 90 ° tests 5.1, 5.2, 5.3, 5.5 and 5.6
  • the Cross-sectional images obtained are typically very uneven, which can be cut off required forces high.
  • the cutting knife shape is clean on the cut off adhesive film and thus creates a clean cut.
  • the adhesive film tears irregularly when it is cut and it becomes no rectangular adhesive film strips received. Numerous microscopic incisions in Longitudinal direction of the cut off adhesive film strips can be demonstrated which is the cause of the unsatisfactory results in residue-free Are resuming.
  • the 3M table dispenser HE 200 with a punching angle of 30 ° also gives low values for residue-free resumption, which essentially due to the low radii of curvature in the area of the tooth tips Cutting knife as well as in the area of the contour between adjacent cutting teeth is caused.
  • the tesa table dispenser 56210 is due to the small radius of curvature in the area of the contour between adjacent tooth tips and the low punch angle with a tear-free repeatability of over 40% well above the previously described dispensers (experiment 5.4).

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Adhesive Tapes (AREA)
  • Adhesive Tape Dispensing Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
EP99104164A 1998-03-17 1999-03-02 Lame de coupe pour un distributeur de ruban adhésif Expired - Lifetime EP0943545B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19811514 1998-03-17
DE19811514A DE19811514A1 (de) 1998-03-17 1998-03-17 Dispensermesser für Klebebandspender

Publications (3)

Publication Number Publication Date
EP0943545A2 true EP0943545A2 (fr) 1999-09-22
EP0943545A3 EP0943545A3 (fr) 1999-12-01
EP0943545B1 EP0943545B1 (fr) 2003-06-04

Family

ID=7861168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104164A Expired - Lifetime EP0943545B1 (fr) 1998-03-17 1999-03-02 Lame de coupe pour un distributeur de ruban adhésif

Country Status (3)

Country Link
EP (1) EP0943545B1 (fr)
DE (2) DE19811514A1 (fr)
ES (1) ES2200422T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115151394A (zh) * 2020-02-25 2022-10-04 皇家飞利浦有限公司 包括具有多个锯切齿的毛发剪切构件的剃刀

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532596A (en) * 1948-01-20 1950-12-05 Samuel H Bobrov Tape dispenser and applier
US2727572A (en) * 1953-01-16 1955-12-20 Permacel Tape Corp Slip-on tape cutter
US4059210A (en) * 1977-01-10 1977-11-22 Minnesota Mining And Manufacturing Company Tape Dispenser
US4175685A (en) * 1978-06-23 1979-11-27 Minnesota Mining And Manufacturing Company Tape dispenser with blade guard
DE2930473A1 (de) * 1979-07-27 1981-02-12 Huggle & Meurer Kg Verpackung fuer folienbahn
DE3228919A1 (de) * 1982-08-03 1984-02-09 Melitta-Werke Bentz & Sohn, 4950 Minden Faltschachtel
DE8904789U1 (de) * 1989-04-17 1989-08-10 Steuer, Herbert, 6380 Bad Homburg Schneidvorrichtung für Bänder an Abrollgeräten
NL9400288A (nl) * 1994-02-25 1995-10-02 Ninaber Peters Krouwel Ind Des Houder voor plakband of dergelijke.
TW303343B (fr) * 1994-09-01 1997-04-21 Inventure Dev Corp
US5839634A (en) * 1997-01-27 1998-11-24 The Procter & Gamble Co. Blade for severing sheet materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115151394A (zh) * 2020-02-25 2022-10-04 皇家飞利浦有限公司 包括具有多个锯切齿的毛发剪切构件的剃刀

Also Published As

Publication number Publication date
EP0943545B1 (fr) 2003-06-04
DE59905788D1 (de) 2003-07-10
EP0943545A3 (fr) 1999-12-01
ES2200422T3 (es) 2004-03-01
DE19811514A1 (de) 1999-09-23

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