CA1248412A - Self adhesive labels and the manufacture thereof - Google Patents
Self adhesive labels and the manufacture thereofInfo
- Publication number
- CA1248412A CA1248412A CA000417832A CA417832A CA1248412A CA 1248412 A CA1248412 A CA 1248412A CA 000417832 A CA000417832 A CA 000417832A CA 417832 A CA417832 A CA 417832A CA 1248412 A CA1248412 A CA 1248412A
- Authority
- CA
- Canada
- Prior art keywords
- web
- adhesive
- labels
- release
- label
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
- B65C9/00—Details of labelling machines or apparatus
- B65C9/26—Devices for applying labels
- B65C9/30—Rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
- B31D1/02—Multiple-step processes for making flat articles ; Making flat articles the articles being labels or tags
- B31D1/021—Making adhesive labels having a multilayered structure, e.g. provided on carrier webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
- B65C9/00—Details of labelling machines or apparatus
- B65C9/08—Label feeding
- B65C9/12—Removing separate labels from stacks
- B65C9/14—Removing separate labels from stacks by vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
- B65C9/00—Details of labelling machines or apparatus
- B65C9/08—Label feeding
- B65C9/18—Label feeding from strips, e.g. from rolls
- B65C9/1865—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0286—Forms or constructions provided with adaptations for labelling machines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Making Paper Articles (AREA)
- Road Signs Or Road Markings (AREA)
- Laminated Bodies (AREA)
- Labeling Devices (AREA)
Abstract
ABSTRACT
Self Adhesive Labels and the Manufacture Thereof The invention relates to the manufcture of self adhesive labels in roll form, without a backing strip.
The base web material is coated on one side with release material which on a polymerisable silicone resin, and on the other side but only on front thereof with pressure sensitive adhesive. The web has sprocket holes on the edges thereof and the adhesive coating does not extend to such edges. The ivention also provides a method of applying adhesive to web wherein the adhesive is applied is a film whose width is controlled in order that the film is not applied over said sprocket holes.
Self Adhesive Labels and the Manufacture Thereof The invention relates to the manufcture of self adhesive labels in roll form, without a backing strip.
The base web material is coated on one side with release material which on a polymerisable silicone resin, and on the other side but only on front thereof with pressure sensitive adhesive. The web has sprocket holes on the edges thereof and the adhesive coating does not extend to such edges. The ivention also provides a method of applying adhesive to web wherein the adhesive is applied is a film whose width is controlled in order that the film is not applied over said sprocket holes.
Description
b~:~iVe_L~ b~ ç~ ;hgl;eQf~
This invention relates to self adhesive labels and the manufacture thereof, and in particular concerns labels which are supplied in roll form. The labels will mainly be for application, using suitable machinery, to 05 individual articles or objects and to tnis end the invention also provides a method of and means for applying labels to articles or objects, or the labels may simply be for detachment individually by hand as is the case when labels are provided, for example, for office use.
It is in fact in the field of produce marketing that pressure sensitive labels find widest application because, for example, in supermarkets and other stores the products on sale are typically priced by means of a small pressure sensitive label which is applied to the product, and frequently these labels have to be changed because of price change, making consumption of the labels enormous.
Also, huge quantities of labels which are applied to containers such as bottles and cans are used, and indeed there are many areas of application for pressure sensitive labels.
Typically, pressure sensitive labels are mounted on a carrier or backing web which is normally a web of paper coated with a suitabale release material such as a silicone compound. The adhesive labels are applied to this carrier or backing web for transportion, storage and utilisation, but the labels can readily be peeled from the ~acking web as there is much a stronger bond between the adhesive and the material of the label, than between the adhesive and the release material.
~2484~.2 Not only is the backing web superfluous after the labels have been peeled therefroM and consumed, but the manufacture of the backing web is a specialist process, and must be performed under carefully controlled 05 conditions The equipment to produce the backing web is expensive, and is extremely large, so that only a very few companies are able to finance and perform the backing strip manufacture. This arises due to the fact that the release material when applied to the backing paper is largely absorbed by the paper (beiny a fibrous, absorbent material), and considerable quantities must be applied and in carefully controlled conditions in order to achieve an outer surface layer of the release coat material which will perform the required function. The relase coat material is a polyerisable material ana requires to be heated af~er application to the paper. The heating time, in order to polymerise the material is related to the quantity applied, and because of the absorbency of the paper web a long period of heating is required to produce the finished product.
There have been proposals to eliminate the backing strip in adhesive labels, but such proposals have not met with any commercial success. One of these proposals as set forth in U.S. Patent No. 3,575,788 wherein a backless roll of labels is produced by printing on clay coated paper on one side with a nitro cellulose base ink, and by coveriny the ink with a heat - cured thermo setting silicone resin release coating, the othec side having a ~ressure sen~itive adhesive applie~ thereto. The silicone release coating is cured at a temperature of 3S0F to 500F.
At such temperatures, there would be a considerable tendency cor the paper to wrinkle, and it is believed tnat for this reason, this proposal has not reached
This invention relates to self adhesive labels and the manufacture thereof, and in particular concerns labels which are supplied in roll form. The labels will mainly be for application, using suitable machinery, to 05 individual articles or objects and to tnis end the invention also provides a method of and means for applying labels to articles or objects, or the labels may simply be for detachment individually by hand as is the case when labels are provided, for example, for office use.
It is in fact in the field of produce marketing that pressure sensitive labels find widest application because, for example, in supermarkets and other stores the products on sale are typically priced by means of a small pressure sensitive label which is applied to the product, and frequently these labels have to be changed because of price change, making consumption of the labels enormous.
Also, huge quantities of labels which are applied to containers such as bottles and cans are used, and indeed there are many areas of application for pressure sensitive labels.
Typically, pressure sensitive labels are mounted on a carrier or backing web which is normally a web of paper coated with a suitabale release material such as a silicone compound. The adhesive labels are applied to this carrier or backing web for transportion, storage and utilisation, but the labels can readily be peeled from the ~acking web as there is much a stronger bond between the adhesive and the material of the label, than between the adhesive and the release material.
~2484~.2 Not only is the backing web superfluous after the labels have been peeled therefroM and consumed, but the manufacture of the backing web is a specialist process, and must be performed under carefully controlled 05 conditions The equipment to produce the backing web is expensive, and is extremely large, so that only a very few companies are able to finance and perform the backing strip manufacture. This arises due to the fact that the release material when applied to the backing paper is largely absorbed by the paper (beiny a fibrous, absorbent material), and considerable quantities must be applied and in carefully controlled conditions in order to achieve an outer surface layer of the release coat material which will perform the required function. The relase coat material is a polyerisable material ana requires to be heated af~er application to the paper. The heating time, in order to polymerise the material is related to the quantity applied, and because of the absorbency of the paper web a long period of heating is required to produce the finished product.
There have been proposals to eliminate the backing strip in adhesive labels, but such proposals have not met with any commercial success. One of these proposals as set forth in U.S. Patent No. 3,575,788 wherein a backless roll of labels is produced by printing on clay coated paper on one side with a nitro cellulose base ink, and by coveriny the ink with a heat - cured thermo setting silicone resin release coating, the othec side having a ~ressure sen~itive adhesive applie~ thereto. The silicone release coating is cured at a temperature of 3S0F to 500F.
At such temperatures, there would be a considerable tendency cor the paper to wrinkle, and it is believed tnat for this reason, this proposal has not reached
2~341~
commercialisation. In any case, the extra step of applying the nitro cellulose ink increases the plant size, time of production and cost of production. For whatever reason other proposals for backless labels do 05 not appear to have been commercialised, because there are no backless pressure sensitive labels on the market.
The present invention is concerned with novel forms of pressure sensitive labels, and with a method for produciny pressure sensitive labels which adapts itself to the utilization of relatively simple and relatively small dimension machinery, enabling the in-house production of pressure sen~itive labels by the manufacturers of the basic substrate material. Such a manufacturer typically is rererred to as a "convertor"
in that he converts the raw material into sheets and webs. The invention also relates to machinery for producing the labels and a method of and means for applying of such labels to products.
According to a first aspect of the invention there is provided ahesive labels in roll form defined by a web of non-porous material which is substantially non-etensible, said web having at one side of the web apressure sensitive adhesive and haviny at the other side of the web a pressure sensitive adhesive release coatiny whereby the web can be rolled up without the need for a backing strip.
The use of a non-porous web presents the considerable advantage that when the release coating is applied thereto, it can be applied in relatively small amounts, which means that the curing tinle for the release coating is reduced, and lower curing temperatures (as compared to the curing temperatures used in U.S. Patent No. 3,575,788 can be used). Moreover, it is not ~2~8412 necessary to apply a nitrocellulose base ink to the web before application of the release coating.
It is preferred that the web should be other than 05 cellulose fibre based as cellulose fibre webs have the disadvantages as aforesaid.
The web is preferably of a relatively norl-extensible material so as to enable the individual labels to be cut therefrom.
The pressure sensitive adhesive may cover the entire surface area or parts of the surface area which in certain cases minimises the risk of the pressure sensitive adhesive beiny squeezed from the coil of laDels to interfere with the unwinding of the web and can increase the ease with which the web of labels can be applied to the product. Preferably, the web is die cut to define individual labels therein and the release 2~ coating is applied over the cuts to provide extra retention strength holding the labels together or to the remainder of the web.
The perforations or other lines of weakening caused by the die cuttinc~ may define the labels so that when the labels are removed from the web there remains a skeletal waste of the web material, but it is also within the scope of the invention that the perforations or other lines of weakening should be arranged so that the entire web area defines labels, with no surplus.
The web may be printed to define the labels, the printing beincj on the side of the web to which the release coating is aplied. Preferably, the we~ is of a synthetic resinous material containing an inorganic filler such as talc or chalk.
5 ~ 12 According to another aspect of the invention there is provided adhesive labels in roll form comprising a web o~ base material, a pressure sensitive adhesive on one side of the web and a pressure sensitive adhesive 05 release coating on the other side so that the web can be rolled up without the use of a backing strip, the web having defined therein, by die cutting or the like, individual labels, which can be individually detached from the roll, and by virtue of the adhesive, attached to articles to be labelled.
In this aspect of the invention, the web may be fibrous or non-Eibrous, the novel feature being that the web has individual labels defined therein for removal lS therefrom, each haviny pressure sensitive adhesive on one side and release coating material on the other web.
Preferably, the release coatiny is applied to the web after the die cutting or the like, so that the release coatiny fills the cuts to lessen the tendency of the labels to detach from the web as unrolling of the web is taking place.
Also, according to the invention there is provided a method of manufacturing labels wherein a web of non-fibrous material which is relatively inextensible isprinted to define individual labels therein, a pressure sensitive adhesive is applied to one side of the web and a pressure sensitive adhesive release coating is applied to the other side of the web so that the web of labels can be rolled up without rec~uiring a backing strip, the adhesive and release coating being subjected, if necessary, to treatment to dry/and cure the same before rolling the web into roll form.
Preferably also, the release coating is a heat curable material, and the web is passed through a hot air oven at a temperature o~ lloC to cure the release coating.
-- ~2484~2 It is preferred that the web should travel in a continuous path through a release coating station, a release coatiny curing station, an adhesive application station and an adhesive drying station, but not 05 neccessarily in that order.
According to yet a further aspect of the invention there is provided a method of applying labels as aforesaid to articles wherein the web is advanced to a unit operating in synchronism with the feed of articles to which the labels are to be applied, said unit taking labels one by one from the web and applying same to the moving articles.
The web material defining the labels will be of a ~hickness consistenl wi~h the Ihickness of the la~els as conventionally used and may be provide~ with sprocket feed holes at the edges thereof.
For the application of the labels which are defined in the web and are removable from the web to leave a skeletal waste, there may be an applicator arranged to punch a portion of the label $rom the web to cause that portion to adhere to the appropriate article, and the article and web are relatively movable from this position so that the relative movement causes the remainder of the label to be removed from the web.
Where the said labels are defined by perforations, these may be such as to leave sufficient "catchpoints"
between the label and the remainder of the web so that the label will remain in position of the web until such times as it is forceably rernoved or dis~laced therefrom. l'he leading edge of the label, which i5 first attached to the product or article may befree oE
such catch points so that it will deflect readily out of the web to sinlplify application.
~484~2 ~ 7 -1 The release coating may be applied to the web by rollers, gravure cylinders or hot melt applicators to provide a surface having a release characteristic. The coating may for example contain non-migrant repellants, and in par-ticular, polymerisable silicone polymers. The coating may for example be a soluent heat cured coating, an aqueous system, solvent free or UV cured, examples of the above are as follows:
Solvent Heat Cured A) Silcolease* (TM) 425 (30%~ (ICI) 100 parts by weight Catalyst 62A (ICI~ 4 parts by weight Catalyst 62B (ICI) 4 parts by weight Toluene 200 parts by weight Curing Time at 120C 10 seconds 100C 15 seconds 90C 20 seconds Dry off solvent prior to cure approx. 5 seconds.
B) a) Syloff* 7046 Basic polymer dispersion.
b~ DowCorning* 7047 Curing agent for Q2-7046*.
al and b) are used in ratio of 10:1 typically.
c) Q2-7090* (Dow Corning) Premium release additive. Is used in varying proportions to lower release levels of basic Q2-7046*.
d) Q2-7089* (Dow Corning) Release modifying *Trade Mark r-'1248412 d) Q2-7089 (Dow Corning) ~elease modifyiny agent. Can be used in varyirlg amounts to ~L~elevelof release of Q2-7046 05 and yives stable modified release levels.
- i B e) Q2-7127 (Dow Corning) Accelerator for Q2-7046. Is used in minute quantities ~o accelerate the cure rate of Q2-7046.
Especially useful for lowtemperature curing on substrates such as polyethylene film.
20f) Syloff 297 (Dow Corning) Anchorage additive.
Necessary to provide abrasion resistance for off-line work (except using P~K).
In the following proportions by volume.
30 Sylo~f 7046 i 1 2 lU ~ 5 r Crosslinker 7047 2 2 1 2.2 3.2 Q2-7090 _ _ _ _ 2 Q2-70~9 _ _ _ 2 Q2-7127 _ _ 0.0~ _ 0.03 35 Sylof-L 297 _ 0.2 _ 0.2 Solvent 78 78 89 80 82 .- . .
Tr~
i2484~2 ~}_Lb_l - Stanclard bath for in-line use or off-line on certain substrates such as PEK.
~h_~ - Standard bath for off-line use, usin~ Syloff ,97 anchorage additive.
()S
~h_~ - Special low solids bath for coating films such as ~olyethylene. Solvent choice important and ethyl acetate best. Uses Q2-7127 as accelerator.
~Sh_~l - Controlled release bath. Features Q2-7089 as release modifier and Sylo~f 297 as anchoraye additive.
15 I?,ath_5 - Premiulil release formulation involving incorporation S22-7090 low viscosity fluid ancl aoditional Q2-7127 to restore catalyst level.
- 20 These are only typical baths and levels of accelerator, release modifier and premium release additive can all be varied to satisEy customer demand~.
~_~iD~a_cQ~ditio~
Bath 1 and 2 cure in 8-12 seconds at 140C depending on substrate nature.
Bath 3 will cure in 15-20 seconds at 70C.
Bath 4 cures typically in 15 seconds at 140C.
Bath 5 cures in 30 seconds at 100C or 10 seconùs at 140C.
- ~24~34~2 .a~Q~S_~iY~ S
A~ SY L O F F 1 17 1 * (5 09~) (D o w C o r n i n g) Organopolysiloxane 14 parts by weight.
C.M.C. (Carboxy methyl cellulose) 2 parts by weight.
B Catalyst 1171P~Dow Corning) Organo-tin Acylate 1.4 parts by weight.
or Catalyst 164'7 (Dow Corniny) Organo-tin Mercaptoacetate 3.5 parts by weight.
Water To yive 100 parts by weight.
Cure time 10 seconds at 120C
20 ~iQlY~ g_~ Q~}$
A) Syloff 7044(10096) (Dow Corning) 100 parts by weight.
Crosslinker 7048 (1009~) (Dow Corning) 4 parts by weight.
B) Coating Q2-7069 (100~6) (Dow Corning) 100 parts by weight.
Crosslinker 7048 (100~6) (Dow Corniny) 4 parts by weight.
Cure time A) 40 seconds at 120C 10 seconds at 170C.
B) 30 seconds at 170C
~ ~e ~
~Z48*~2 SL~ ~ÇYL~
A) Silicone Dehasiv VP 1502 (100%) (Wacker) 100 parts by weight.
05 Crosslinkiny Agent VP 1503 (100%) (Wacker) 4 parts by weight.
Catalyst OL (100%) (Wacker) 0.4 parts by weight.
; B lo B) Silicone X-62-7004 (100~) (Shin-Etsu Ghemical Co.
Ltd) 100 parts by weight.
Catalyst X-92-095 (100~) (Shin-Etsu Chemical Co.
Ltd) 10 parts by weiyht.
Cure rate 0.6 seconds with high pressure mercury Vapour U. V. lamp (160 W/cm).
The amount of release coating applied may be in the order of 0.1 to 1.5 grams/sq. metre depending upon the web. The pressure sensitive adhesive may be applied by conventional means, and typicallay may be a solvent or water based emulsion of which the solvent or water is dried from the web after application. ~he pressure sensitive adhesive may for exaMple be hot melt, water based, or solvent based, examples of which are as follows:
~Q~_ gl~
309 Elvax *40-P (Du Pont) (Ethylene-vinyl acetate resin) 40 parts by weight.
Piccovar* L-60 (llercules Inc.) (Hydrocarbon resin) 60 parts by weiyht.
Irganox *1010 (Ciba Geigy) (Antioxidant) - 0.5 parts by weight.
~ ~e ~ k ~g~Q~
Indatex SE2229S (Industrial Adhesives Ltd) SQ1Y~
Vinalak 5150 (Vinyl Products Ltd) The labels rnay be colour printed by any suitable method such as letter press, flexographic, gravure or offset litho.
~ or the web material, it is preferred to use polypropylene or high density polyethylene film, including substantiaï propor~ions o$ particulate inorganic ~laterial.
Typically, the inorganic material may be included in the range 20 to 50% of the web by volume, and in the preferred case the web is polypropylene ethylene sequential copolymer, as described in our British Patent No. (1544,143) filled with 40~ talc.
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, wherein:-Fig. 1 is a perspective view of a roll of labels according to the present invention;
Fig. 2 is an enlarged seçtional elevation of the webshown in Fig. l;
Fig. 3 illustrates diayrammatically one embodiment of how the labels are applied to indivil~ual cans, ."
Fig. 4 shows the process of Fig. 3 in side elevation;
Fig. 5 shows a roll of labels according to a second embodiment of the invention;
Fig. 6 shows in perspective view how a roll of labels is utilised in accordance with another apsepct of the invention;
Fig. 7 illustrates how the labels of Fig. 1 are applied -- to box shaped products;
Fig. 8 illustrates apparatus for the coatiny of the web of labels with pressure sensitive adhesive and release coatin~ accordin-J to one metho~;
Fi~s. 9 and 10 illustrate apparatus for the said coating accordiny to two other methods, and Fig. 11 illustrate~ apparatus which is a modification of the Fig. 10 apparatus.
Referring firstly to Figs 1 to 6 of the drawings, in Fig. 1 there is shown a web 10 having perforations 12 defininy individual labels 14, each provided with printing 16. Catchpoints 18 serve to hold the labels to the remainder of the web 10, but the catchpoints can be burst or cut to enable removal of labels 14 leaving a residual skeletal waste.
As shown in Fig. 2, the web 10 is made up of a central substrate web 20 which is of a non-fibrous anu substantially inextensible material and on one side of which is applied a pressure sensitive a~hesive coating 22, and on the other siee is applied a release coating 24. The web is shown in ~reatly enlaryed ~imen6ion in Fiy. 2, to illustrate the slits 12 and also to illus~rate how the coatin~ materials 22 and 24 migrate 14 ~iL2484~12 into the said slits 12. The substratge 20, adhesive coating 22 and release coating 24 are of a nature as described herein, and the web is wound so that the adhesive coating 22 is to the inner side of each coil 05 and contacts directly on the release coating 24 of the adjacent inner coil. This arrangement enables the web 10 to be easily unrollecl. The web may be wound on a suitable core 26.
10 In produciny the web 10 as illustrated in Fiy. 1, the printing 16 (single or multi coloured and of any clesire~l pattern alld/or content) is applied to the subs~rate 20 prior to the appliation of the coating 24 anà in a~idition, the perforations or slits 12 are 15 ~orlned prior to the application of the said coatiny 24.
The coa~iny 24 in fact has the errect of assisting the holdin3 of tne labels 14 in ~osition in the web until ~hey are removed for application to articles. The coating 24 also serves the purpose of preventing 20 migration of the adhesive 22 though the slits 12 when the web is wound on core 26. This tendency to mi~rate will depend upon how tightly the roll is wound on core 26.
25 Figs. 3 and 4b illustrate diagramlllatically how the individual labels 14 may be renloved from the web 10 and applied to can bodies such as can body 28. In fig. 3, the web 10 is shown as travelliny round a yuide drum 30 in the direction of arrow 32, with the pressure 30 sensitive adhesive coatiny side outermost. Each can 28 to be labelled comes into contact with the pressure sensitive side of the web 10, and a label 14 is removed from the web 10 and applied to the can body 28, as shown in Fig. 4. How this is achieved will depend upon 35 the design of the equipment, but it is envisaged tha the web 10 will be held by suitable sprocket wheels or rollers enya~ing holes at each side of the web and the -124~12 web will be illdexea forwards towards the product to be labelled. ~he leading edge of the label, having regard to its direction of movement (arrows 32), can be released fronl the web by a suitable knife or by virtue 05 of changing the direction of movement of the web sharply. The contact pressure between the pressure sensitive surface and the product being labelled can be used to effect or a~sist the complete removal of the label from the web. The removal may if necessary be assisted by severing the remaining catchpoints 18 by means of suitable knives positioned appropriately. The skeletal waste of the web 10 may be wound up into a suitable coil for disposal.
The web shown in Fig. 1 has the labels defined therein cy the perforations or slits 12, which are arrangea to leave a skeletal waste, but in the arrangemenr of Fig.
5, the slits 12 define lines of weakeniny extending across the entire width of the roll, so that the individual labels 14 constitute the entire web without any wastage. The feed and applicator apparatus ~or handling this form of web may have to be modiEied as there is no resulting skeletal waste, and if necessary, the corners of the labels may be profiled as indicated by reference numeral 34. The web 10 of the roll of labels sllown in Fig. 5 is constructed in the same manner as the web described in relation to Figs. 1 and 2.
In the arranger.lent shown in Fig. 6, a web 10 carries printiny 16 which repeats at pitch lengths P, but the web has no perforations or lines of weakening. The wen defines contiguous labels which have to be cut from the web by ~uitable cutting equipment located in the region of the application head 36 so that individual labels are cut fror~l the web immediately prior to or during application of the label to the article 28 to which the 16 ~24~412 label is being applied. The individual labels can make up the entire web as illustrated in the arranyement of Fig. 5, or can be portions to be cut from the web as indicated in Fig. 1, but in this arrangement also no 05 carrier sheet is required, as the web 10 will be constructed in the same fashion as the web 10 illustrated in Fig. 1. Fig. 7 shows, in somewhat ~reater detail how labels in roll form as shown in Fig.
1 may be applied to box shaped products 40. rrhe roll of labels is indicated by numeral 42 and is unwound from this roll by a tractor unit 44 having a suitable sprocket feed device which engages the holes in the margins of the web 10 (the said holes are not shown in the drawings) and is fed through a removal and application station 46. The skeletal residue of the web 10 is wound into roll fornlas shown by numeral 48.
The a~hesive side of the web 10 is the upper side and all surfaces which contact this adhesive side are required to be of a nature so as not to adhere to the adhesive. Such surfaces may be defined by silicone release material.
The removal and application station 46 comprises an upper ~resure nip roller 50 (silicone coated) and a lower vacuum cylinder 52 around which the web 10 laps slightly as shown in Fig.7, and which has a plurality of circumferentially spaced ports 54 which connect with axially extendincJ passages 55, which are selectively connectable to a source of vacuum or, when at detachment position 56, with a blast of air under pressure. A valve plate 58 at one end of the cylinder controls the connection of the passage 55 to the source OL vacuum and the blast of air in that said plate 58 has an arcuate port 60 coupled to the source of vacuum and a port hole at position 56 connected to the air under pressure. In use, tne cylinder S2 rotates in the direction of arrow 62 whilst the plate 58 remains stationery and each passage 55 which registers with port 60 is connected to the source of vacuum. Each passage 55 which leaves register with slot 60 arrives 05 first at position 56 where it receives a blast of air under pressure, and then the passage is blanked off until it once more reaches the port 60.
Operation of the unit 46 will be understood from the above. The individual labels L are detached by the vacuum at the nip between roller 50 and cylinder 52, and travel round with the cylinder 52 until they reach station 56 at which they are progresively applied to the products 40 which are moving as indicated by arrow 63, in synchronism with the feed of the labels. To this end the labels and products may be fed on an indexing or continous basis, with interlinking controls ensuring that the operation proceeds only when the presence of a label and a product has been detected.
The arrangement shown in Fig. 7 could be modified to handle a roll of labels such as shown in Fig. 6, which are required to be cut from the web, and a suitable die cutting means would be provided in the region of the application station.
It is estimated that the apparatus shown inFig.7 will be capable of applying labels at the rate of approx.
200/min in part because the label roll has no backing strip.
Reference is now Made to Figures 8 to 11, which shows methods of manufacturing labels according to the invention.
Referring to Fig. 8 of the drawings, a roll 110 of stock material in which la~els are to be formed may 18 ~.2~L84~2 suitably be of a width of 450 millimetres ana thickness 80 micron, the material may be a blo~,Jn f ilm manufactured from a filled plastics material of the nature set out in British Patellt No. 1,554,143, but in 05 any event should be a non-fibrous and substantially non-extensible material. The web passes fro~n roll 110 throuyh silicone compound coating assembly 112 at which release coating is ayplied to one side (the first side) of the web, and then the web travels tt,rough a heating 10 chamber 116 which is ciivided into two compartments 118 and 120 by means of a horizontal partition 122. The release coating is cured by passiny the weo back and forth through the chamber 118 with the first side initially face downwards then face upwards. The web 15 emerges from the chamber 118, after a traverse time of 20 seconds in an envirom~ellt maintaineci at 1;~0C, ana the web is engaged by a pair of yuide rolls 124 and 126.
20 The web next passes through a pressure sensitive adhesive coater assembly 128 of the form shown which applies pressure sensitive adhesive composition t:o the other and second side of the web. The web is led by means of feed conveyor 130 into the upper neatiny 25 chamber 120 which i~ maintainea at 110C, in order to drive off the solvents o~ the adhesive coatinys, to dry same. The emergent web E~asses over guide rolls 132 and 134 (134 being silicone coated so ti~at it will not sticl; to the adhesive side or the web which it 30 contacts) and then passes throuyh aie cuttiny rolls 35, 133 (138 being silicone coatea) which ~eLine tne individual labels in the web, and the web is WOUlld into roll 140.
35 Com}!ared to conventional methods of applyin~ silicone coating to webs for the production of labels, che above equipment is extremely simple an-:l can be operate by ~2484~. 2 convertors of raw material on an in-house basis, the entire treatment having a cyle time of no more than half a minute to one minute and the overall lenyth of the apparatus being no greater than 8-10 metres. The 05 web material 110 will usually be pre-printed to define the label printed matter, and the silicone composition is applied over the printed side of the web. The rollers 124 and 126 may be the rotary die cutting rollers in order to define the individual labels in the 10 web by cutting through the web to define the labels but also to leave catch points whereby the labels remain connected to the web stock material until clisplaced therefrom, instead of rollers 134 ana 136.
15 In the arrangement shown in Fig. 9, the silicone release coating i6 an ultra violet curable ma~erial, and therefore after the coatiny is applied, tne web is passea throuyh an ultra violet dryer 140, which is cluicker and less expensive than hot air drying. The 20 adhesive is applied and dried as before.
In the arrangement of Fig. 10, both the silicone release coatiny and the adhesive are ultra violet curable and therefore there are two ultra violet driers 25 140 ancl 142 respectively for the silicone release coatiny and the adhesive, through which the web passes in turn after application of the respective coatinys.
Fig. 11 shows an arrangement similar to Fig. 10 in that ultra violet dryers are used. Only the path of travel 30 of the web is different. The parts of the apparatus in Figs 9, 10 and 11 already referred to in Fig. 8 are desiynated with the same referènce numerals. In each of the arrangements shown in Fiys 8 to 11, the web travels first through the silicone coater 112 anct 35 seconcl throucJh the adhesive coater. This order could be reversed if desired. Also, an arranyement wherein a UV dryer is u~;ed for the adhesive and a l--ot air dryer ~2~84~2:
is used for the release coating can be adopted.
another form of dryer which can be used at least for the adhesive i5 a radio frequency dryer.
05 In the production flow path in any of the apEjaratus of Figs ~ to 11, after the stage of a~plication of the adhesive, all of the rollers which contact the adhesive side are provided with a silicone coating in order to prevent sticking of the rollers to the adhesive, and of course it is possible in accordance with the invention directly to wind the web 110 after the adhesive and silicone materials have been applied in that the silicone side of the web will not adhere to the adhesive in the coiling and uncoiling of the web.
'rhe speed and simplicity of production is achieve~ ~i selecting a web material which is non-fibrous and therefore will not absorb excessive of amounts OL the silicone material, which hap~ens when paper webs are coated as in the conventinal method of produciny adhesive labels.
The web 110 may be provided with apertures in the margins thereof to enable the fee~ing of the web in the apparatus for removal of the labels from the web for application to articles before or after being coated.
The said apertures may also serve for the driving of the web through the equipment shown in Figs ~ to 11.
When the silicone coating is heat cured, the temperature at whicn the curing of the silicone coating takes place will be dictated in fact by the material of the web, tile s~eed of the web and the thickness of the coating. Clearly, althouyh the curiny tinle can be reduced by increasiny the curiny temperature, the temperature cannot be so high as to cause disirte~ratiol-~ oi the web material itself.
21 124~3~12 It is preferred that the operation will proceed on a continuouc basis, but it can be arranged to take place on a step by step basis witil dwell times during which the silicone is cured ancl the adhesive is dried.
Any suitable form of pressure sensitive adhesive can be used.
The thickness of the web can depend upon the application, but typically labels are manufactured in a thickness of approxirnately 25 to 250 microns, with the filled plastics material web being typically 80 microns. The quantity of silicone coatiny which is recluired for such labels typically would be as little as 2 yms. per square metre, whereas with paper webs as mucn as 40 gms. per square mctre may oe requirec.
As concerns the method of pro~uciny the labels, an advantage of the preferred method of the invention resides in that the polymerisable release coatincJ, which may be a silicone compound, can be polymerised in a relatively short time by virtue of the fact that the substrate web r.laterial i~ non-fibrous and therefore will not absorb the release coat material when applied.
This means that only a fraction of the an,ount of release coat material normally applied will be used (as little as S~ as compared to the conventional method) and correspondingly the curing time is significantly reduced. I~ith a slow curing time, correspondincJly simpler ancl therefore smaller machinery can be employed for the manufacture of the labels.
Tests usin~ a silicone release coatincJ material applied in aMounts of 2 gm/sq metre have shown that lO seconds in a chamber lleated to 120C achieves satisfactory cure of tne silicone release coat material.
- 22 - ~248412 SUPPLEMENTARY DISCLOSURE
1 Fig, ~ is a part-sectional side view of apparatus for applying adhesive to a roll of labels;
i~
Fig. ~4 is a side view of applicator roll shown in Fig. ~;
1~
Fig, ~ is a perspective view of the apparatus shown in Fig. ~, and Fig. ~ is a diagrammatic side elevation of the adhesive supply circuit.
The principal components of an adhesive coating unit for coating the label stock web are illustrated in Fig.
. The applicator roller 74 is shown as are two guide or path rollers 72 and 76, The application roller 74 is located vertically above a trough roller 194, and the application roller 74 and trough roller 194 are adhered together by gears 196, 198, respectively secured to the shaft of said rollers. The application roller is carried on a lever arm 200 which is pivotable by means of an air cylinder 202 through a crank 204 connected between the pis-ton of the air cylinder and the lever 200 so that the app-lication roller can be raised clear of the trough roller 194 so as not to pick up any adhesive therefrom when ad-hesive pick-up is not required.
The path rollers 72 and 76 guide the base material 32 into small arcuate contact with application roller 74, but each of the path rollers 72 and 76 can be raised and lowered by means of pneumatic cylinders 206 and 208 respectively.
Cylinder 206 acts directly on roller 72 to raise and lower sam,e, whilst cylinder 208 acts through a bell crank lever ZIV.
The function of the adhesive coating unit is to apply an even layer of water based adhesive to the material 32, and although not shown in Fig, ~3, there is a tray contain-ing the water based adhesive material and into which the roll 194 dips in order to pick up the adhesive.
~.
~248412 1 Additionally, there are doctor blades 210 for removing adhesive along the peripheral rings on the application roller, so that the adhesive will be applied to the web 32 only if desired at strip locations. In this connection it has been mentioned that the adhesive is removed from the application rollers so that the adhesive will not be applied over the sprocket holes in the base material. As many doctor blades 210 as required will be used for this purpose, depending upon the number of rolls of labels which are formed in the base material 32.
Additionally, there is a meyerbar 212 located at the top of adjustable pedestals 214 so that the meyerbar will contact the adhesive coated surface of the material 32 by a process to be explained.
Trough roller 194 and application roller 74 are 3 directly driven by means of motor 216 as shown in Fig. ~, which is geared to the shaft of the trough roller 94 by means of gears 218 and 220.
The adhesive system for the adhesive coating unit is shown in Fig. ~, and will be seen to comprise a stain-less steel tray 222 containing the adhesive and into which the trough roller dips. The tray is equipped with a pump 224, a filter 225, and a pipe system 228 and 230 to enable the adhesive to be replenished during normal operation from an adhesive reservoir 232. The pipe 228 is connected to a water supply to enable the addition of water to the ad-hesive reservoir, and shut-off valves 232 and 234 are provided in the pipes 230 and 228 for control purposes.
An overflow 236 from the tray 222 leads to a down pipe 238 which returns overflow adhesive to the adhesive reservoir 230.
The meyerbar 212 controls the amount of adhesive applied to the base material. The meyerbar is a small diameter wire wound rod (similar in appearance to a threaded bar). The weight of the coated adhesive applied is directly propor-tionate to the meyerbar wire size, and any suitable size of ~248at~L2 1 meyerbar may be used depending upon the application. During operation the meyerbar is driven by an air motor and rotates in a direction against the flow of the material. this con-traflow rotation scrapes up excess adhesive into a tray located under the meyerbar.
During normal operation the tray 222 is half full of adhesive and is in an elevated position. The roller 194 is partially immersed in the adhesive and as it turns it trans-fers adhesive to the application rollers 74. Path rollers 72 and 76 are in a down position allowing the material to run as shown in Fig. ~3 in contact with the application roller. As the base material 32 moves through the unit it is charged with adhesive by the application roller 74 and then passes to the meyerbar 212 where the rotating meyerbar removes excess adhesive and the adhesive coated base material con-tinues from the path roller 76 to a radio frequency dryer unit (not shown). When it is necessary to stop the adhesive coating operation, the path rollers 76 and 72 raise the material away from the application roller 74. This is achieved by a control system as a two-step function. The roller 72 is raised first, followed by the raising the roller 76. This ensures that all the adhesive applied to the material 32 is scraped by the meyerbar.
Reference is also made specifically to Fig. ~ which shows the label stock material 32 and how it is provided with edge sprocket holes 32A. This figure also shows the evenly pitched labels 32B which are printed on the web 32 at regular intervals and in registry with the sprocket holes 32A. The figure also shows clearly the meyerbar 212 and the guide roller 76, and an additional guide roller 76A has been shown in order to indicate the reverse side of the web 32 and on which the adhesive strip 85 is applied. The width of the adhesive strip is as described herein set by the doctor blades ~, which are adjustable axially of the roller 74 to ensure that adhesive does not come into contact with the underside of the web 32 in the region of the sprocket holes 32A.
~48~2 1In the arrangement illustrated in Fig, ~, only a `-1 sample row of labels 32B is indicated, but the web may be printed with parallel rows of labels, and they will be twin rows of sprocket holes between adjacent rows or labels so that when the web is eventually cut into individual rows there will be sprocket holes to each side of each roll of labels. Again appropriate doctor blades may be used to ensure that the adhesive strip 85 which is applied to each roll does not extend to the sprocket holes at the web edges.
It will be seen that the adhesive application unit of the supplementary disclosure presents a number of signi-ficant features, namely that the adhesive is put on by an applicator roller in amounts more than required, and subsequently is scraped by the meyerbar. Additionally, when the operation is to be stopped, steps are taken to ensure that the material is removed from the application roller in a particular fashion to ensure that all applied adhesive is scraped by the meyerbar.
commercialisation. In any case, the extra step of applying the nitro cellulose ink increases the plant size, time of production and cost of production. For whatever reason other proposals for backless labels do 05 not appear to have been commercialised, because there are no backless pressure sensitive labels on the market.
The present invention is concerned with novel forms of pressure sensitive labels, and with a method for produciny pressure sensitive labels which adapts itself to the utilization of relatively simple and relatively small dimension machinery, enabling the in-house production of pressure sen~itive labels by the manufacturers of the basic substrate material. Such a manufacturer typically is rererred to as a "convertor"
in that he converts the raw material into sheets and webs. The invention also relates to machinery for producing the labels and a method of and means for applying of such labels to products.
According to a first aspect of the invention there is provided ahesive labels in roll form defined by a web of non-porous material which is substantially non-etensible, said web having at one side of the web apressure sensitive adhesive and haviny at the other side of the web a pressure sensitive adhesive release coatiny whereby the web can be rolled up without the need for a backing strip.
The use of a non-porous web presents the considerable advantage that when the release coating is applied thereto, it can be applied in relatively small amounts, which means that the curing tinle for the release coating is reduced, and lower curing temperatures (as compared to the curing temperatures used in U.S. Patent No. 3,575,788 can be used). Moreover, it is not ~2~8412 necessary to apply a nitrocellulose base ink to the web before application of the release coating.
It is preferred that the web should be other than 05 cellulose fibre based as cellulose fibre webs have the disadvantages as aforesaid.
The web is preferably of a relatively norl-extensible material so as to enable the individual labels to be cut therefrom.
The pressure sensitive adhesive may cover the entire surface area or parts of the surface area which in certain cases minimises the risk of the pressure sensitive adhesive beiny squeezed from the coil of laDels to interfere with the unwinding of the web and can increase the ease with which the web of labels can be applied to the product. Preferably, the web is die cut to define individual labels therein and the release 2~ coating is applied over the cuts to provide extra retention strength holding the labels together or to the remainder of the web.
The perforations or other lines of weakening caused by the die cuttinc~ may define the labels so that when the labels are removed from the web there remains a skeletal waste of the web material, but it is also within the scope of the invention that the perforations or other lines of weakening should be arranged so that the entire web area defines labels, with no surplus.
The web may be printed to define the labels, the printing beincj on the side of the web to which the release coating is aplied. Preferably, the we~ is of a synthetic resinous material containing an inorganic filler such as talc or chalk.
5 ~ 12 According to another aspect of the invention there is provided adhesive labels in roll form comprising a web o~ base material, a pressure sensitive adhesive on one side of the web and a pressure sensitive adhesive 05 release coating on the other side so that the web can be rolled up without the use of a backing strip, the web having defined therein, by die cutting or the like, individual labels, which can be individually detached from the roll, and by virtue of the adhesive, attached to articles to be labelled.
In this aspect of the invention, the web may be fibrous or non-Eibrous, the novel feature being that the web has individual labels defined therein for removal lS therefrom, each haviny pressure sensitive adhesive on one side and release coating material on the other web.
Preferably, the release coatiny is applied to the web after the die cutting or the like, so that the release coatiny fills the cuts to lessen the tendency of the labels to detach from the web as unrolling of the web is taking place.
Also, according to the invention there is provided a method of manufacturing labels wherein a web of non-fibrous material which is relatively inextensible isprinted to define individual labels therein, a pressure sensitive adhesive is applied to one side of the web and a pressure sensitive adhesive release coating is applied to the other side of the web so that the web of labels can be rolled up without rec~uiring a backing strip, the adhesive and release coating being subjected, if necessary, to treatment to dry/and cure the same before rolling the web into roll form.
Preferably also, the release coating is a heat curable material, and the web is passed through a hot air oven at a temperature o~ lloC to cure the release coating.
-- ~2484~2 It is preferred that the web should travel in a continuous path through a release coating station, a release coatiny curing station, an adhesive application station and an adhesive drying station, but not 05 neccessarily in that order.
According to yet a further aspect of the invention there is provided a method of applying labels as aforesaid to articles wherein the web is advanced to a unit operating in synchronism with the feed of articles to which the labels are to be applied, said unit taking labels one by one from the web and applying same to the moving articles.
The web material defining the labels will be of a ~hickness consistenl wi~h the Ihickness of the la~els as conventionally used and may be provide~ with sprocket feed holes at the edges thereof.
For the application of the labels which are defined in the web and are removable from the web to leave a skeletal waste, there may be an applicator arranged to punch a portion of the label $rom the web to cause that portion to adhere to the appropriate article, and the article and web are relatively movable from this position so that the relative movement causes the remainder of the label to be removed from the web.
Where the said labels are defined by perforations, these may be such as to leave sufficient "catchpoints"
between the label and the remainder of the web so that the label will remain in position of the web until such times as it is forceably rernoved or dis~laced therefrom. l'he leading edge of the label, which i5 first attached to the product or article may befree oE
such catch points so that it will deflect readily out of the web to sinlplify application.
~484~2 ~ 7 -1 The release coating may be applied to the web by rollers, gravure cylinders or hot melt applicators to provide a surface having a release characteristic. The coating may for example contain non-migrant repellants, and in par-ticular, polymerisable silicone polymers. The coating may for example be a soluent heat cured coating, an aqueous system, solvent free or UV cured, examples of the above are as follows:
Solvent Heat Cured A) Silcolease* (TM) 425 (30%~ (ICI) 100 parts by weight Catalyst 62A (ICI~ 4 parts by weight Catalyst 62B (ICI) 4 parts by weight Toluene 200 parts by weight Curing Time at 120C 10 seconds 100C 15 seconds 90C 20 seconds Dry off solvent prior to cure approx. 5 seconds.
B) a) Syloff* 7046 Basic polymer dispersion.
b~ DowCorning* 7047 Curing agent for Q2-7046*.
al and b) are used in ratio of 10:1 typically.
c) Q2-7090* (Dow Corning) Premium release additive. Is used in varying proportions to lower release levels of basic Q2-7046*.
d) Q2-7089* (Dow Corning) Release modifying *Trade Mark r-'1248412 d) Q2-7089 (Dow Corning) ~elease modifyiny agent. Can be used in varyirlg amounts to ~L~elevelof release of Q2-7046 05 and yives stable modified release levels.
- i B e) Q2-7127 (Dow Corning) Accelerator for Q2-7046. Is used in minute quantities ~o accelerate the cure rate of Q2-7046.
Especially useful for lowtemperature curing on substrates such as polyethylene film.
20f) Syloff 297 (Dow Corning) Anchorage additive.
Necessary to provide abrasion resistance for off-line work (except using P~K).
In the following proportions by volume.
30 Sylo~f 7046 i 1 2 lU ~ 5 r Crosslinker 7047 2 2 1 2.2 3.2 Q2-7090 _ _ _ _ 2 Q2-70~9 _ _ _ 2 Q2-7127 _ _ 0.0~ _ 0.03 35 Sylof-L 297 _ 0.2 _ 0.2 Solvent 78 78 89 80 82 .- . .
Tr~
i2484~2 ~}_Lb_l - Stanclard bath for in-line use or off-line on certain substrates such as PEK.
~h_~ - Standard bath for off-line use, usin~ Syloff ,97 anchorage additive.
()S
~h_~ - Special low solids bath for coating films such as ~olyethylene. Solvent choice important and ethyl acetate best. Uses Q2-7127 as accelerator.
~Sh_~l - Controlled release bath. Features Q2-7089 as release modifier and Sylo~f 297 as anchoraye additive.
15 I?,ath_5 - Premiulil release formulation involving incorporation S22-7090 low viscosity fluid ancl aoditional Q2-7127 to restore catalyst level.
- 20 These are only typical baths and levels of accelerator, release modifier and premium release additive can all be varied to satisEy customer demand~.
~_~iD~a_cQ~ditio~
Bath 1 and 2 cure in 8-12 seconds at 140C depending on substrate nature.
Bath 3 will cure in 15-20 seconds at 70C.
Bath 4 cures typically in 15 seconds at 140C.
Bath 5 cures in 30 seconds at 100C or 10 seconùs at 140C.
- ~24~34~2 .a~Q~S_~iY~ S
A~ SY L O F F 1 17 1 * (5 09~) (D o w C o r n i n g) Organopolysiloxane 14 parts by weight.
C.M.C. (Carboxy methyl cellulose) 2 parts by weight.
B Catalyst 1171P~Dow Corning) Organo-tin Acylate 1.4 parts by weight.
or Catalyst 164'7 (Dow Corniny) Organo-tin Mercaptoacetate 3.5 parts by weight.
Water To yive 100 parts by weight.
Cure time 10 seconds at 120C
20 ~iQlY~ g_~ Q~}$
A) Syloff 7044(10096) (Dow Corning) 100 parts by weight.
Crosslinker 7048 (1009~) (Dow Corning) 4 parts by weight.
B) Coating Q2-7069 (100~6) (Dow Corning) 100 parts by weight.
Crosslinker 7048 (100~6) (Dow Corniny) 4 parts by weight.
Cure time A) 40 seconds at 120C 10 seconds at 170C.
B) 30 seconds at 170C
~ ~e ~
~Z48*~2 SL~ ~ÇYL~
A) Silicone Dehasiv VP 1502 (100%) (Wacker) 100 parts by weight.
05 Crosslinkiny Agent VP 1503 (100%) (Wacker) 4 parts by weight.
Catalyst OL (100%) (Wacker) 0.4 parts by weight.
; B lo B) Silicone X-62-7004 (100~) (Shin-Etsu Ghemical Co.
Ltd) 100 parts by weight.
Catalyst X-92-095 (100~) (Shin-Etsu Chemical Co.
Ltd) 10 parts by weiyht.
Cure rate 0.6 seconds with high pressure mercury Vapour U. V. lamp (160 W/cm).
The amount of release coating applied may be in the order of 0.1 to 1.5 grams/sq. metre depending upon the web. The pressure sensitive adhesive may be applied by conventional means, and typicallay may be a solvent or water based emulsion of which the solvent or water is dried from the web after application. ~he pressure sensitive adhesive may for exaMple be hot melt, water based, or solvent based, examples of which are as follows:
~Q~_ gl~
309 Elvax *40-P (Du Pont) (Ethylene-vinyl acetate resin) 40 parts by weight.
Piccovar* L-60 (llercules Inc.) (Hydrocarbon resin) 60 parts by weiyht.
Irganox *1010 (Ciba Geigy) (Antioxidant) - 0.5 parts by weight.
~ ~e ~ k ~g~Q~
Indatex SE2229S (Industrial Adhesives Ltd) SQ1Y~
Vinalak 5150 (Vinyl Products Ltd) The labels rnay be colour printed by any suitable method such as letter press, flexographic, gravure or offset litho.
~ or the web material, it is preferred to use polypropylene or high density polyethylene film, including substantiaï propor~ions o$ particulate inorganic ~laterial.
Typically, the inorganic material may be included in the range 20 to 50% of the web by volume, and in the preferred case the web is polypropylene ethylene sequential copolymer, as described in our British Patent No. (1544,143) filled with 40~ talc.
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, wherein:-Fig. 1 is a perspective view of a roll of labels according to the present invention;
Fig. 2 is an enlarged seçtional elevation of the webshown in Fig. l;
Fig. 3 illustrates diayrammatically one embodiment of how the labels are applied to indivil~ual cans, ."
Fig. 4 shows the process of Fig. 3 in side elevation;
Fig. 5 shows a roll of labels according to a second embodiment of the invention;
Fig. 6 shows in perspective view how a roll of labels is utilised in accordance with another apsepct of the invention;
Fig. 7 illustrates how the labels of Fig. 1 are applied -- to box shaped products;
Fig. 8 illustrates apparatus for the coatiny of the web of labels with pressure sensitive adhesive and release coatin~ accordin-J to one metho~;
Fi~s. 9 and 10 illustrate apparatus for the said coating accordiny to two other methods, and Fig. 11 illustrate~ apparatus which is a modification of the Fig. 10 apparatus.
Referring firstly to Figs 1 to 6 of the drawings, in Fig. 1 there is shown a web 10 having perforations 12 defininy individual labels 14, each provided with printing 16. Catchpoints 18 serve to hold the labels to the remainder of the web 10, but the catchpoints can be burst or cut to enable removal of labels 14 leaving a residual skeletal waste.
As shown in Fig. 2, the web 10 is made up of a central substrate web 20 which is of a non-fibrous anu substantially inextensible material and on one side of which is applied a pressure sensitive a~hesive coating 22, and on the other siee is applied a release coating 24. The web is shown in ~reatly enlaryed ~imen6ion in Fiy. 2, to illustrate the slits 12 and also to illus~rate how the coatin~ materials 22 and 24 migrate 14 ~iL2484~12 into the said slits 12. The substratge 20, adhesive coating 22 and release coating 24 are of a nature as described herein, and the web is wound so that the adhesive coating 22 is to the inner side of each coil 05 and contacts directly on the release coating 24 of the adjacent inner coil. This arrangement enables the web 10 to be easily unrollecl. The web may be wound on a suitable core 26.
10 In produciny the web 10 as illustrated in Fiy. 1, the printing 16 (single or multi coloured and of any clesire~l pattern alld/or content) is applied to the subs~rate 20 prior to the appliation of the coating 24 anà in a~idition, the perforations or slits 12 are 15 ~orlned prior to the application of the said coatiny 24.
The coa~iny 24 in fact has the errect of assisting the holdin3 of tne labels 14 in ~osition in the web until ~hey are removed for application to articles. The coating 24 also serves the purpose of preventing 20 migration of the adhesive 22 though the slits 12 when the web is wound on core 26. This tendency to mi~rate will depend upon how tightly the roll is wound on core 26.
25 Figs. 3 and 4b illustrate diagramlllatically how the individual labels 14 may be renloved from the web 10 and applied to can bodies such as can body 28. In fig. 3, the web 10 is shown as travelliny round a yuide drum 30 in the direction of arrow 32, with the pressure 30 sensitive adhesive coatiny side outermost. Each can 28 to be labelled comes into contact with the pressure sensitive side of the web 10, and a label 14 is removed from the web 10 and applied to the can body 28, as shown in Fig. 4. How this is achieved will depend upon 35 the design of the equipment, but it is envisaged tha the web 10 will be held by suitable sprocket wheels or rollers enya~ing holes at each side of the web and the -124~12 web will be illdexea forwards towards the product to be labelled. ~he leading edge of the label, having regard to its direction of movement (arrows 32), can be released fronl the web by a suitable knife or by virtue 05 of changing the direction of movement of the web sharply. The contact pressure between the pressure sensitive surface and the product being labelled can be used to effect or a~sist the complete removal of the label from the web. The removal may if necessary be assisted by severing the remaining catchpoints 18 by means of suitable knives positioned appropriately. The skeletal waste of the web 10 may be wound up into a suitable coil for disposal.
The web shown in Fig. 1 has the labels defined therein cy the perforations or slits 12, which are arrangea to leave a skeletal waste, but in the arrangemenr of Fig.
5, the slits 12 define lines of weakeniny extending across the entire width of the roll, so that the individual labels 14 constitute the entire web without any wastage. The feed and applicator apparatus ~or handling this form of web may have to be modiEied as there is no resulting skeletal waste, and if necessary, the corners of the labels may be profiled as indicated by reference numeral 34. The web 10 of the roll of labels sllown in Fig. 5 is constructed in the same manner as the web described in relation to Figs. 1 and 2.
In the arranger.lent shown in Fig. 6, a web 10 carries printiny 16 which repeats at pitch lengths P, but the web has no perforations or lines of weakening. The wen defines contiguous labels which have to be cut from the web by ~uitable cutting equipment located in the region of the application head 36 so that individual labels are cut fror~l the web immediately prior to or during application of the label to the article 28 to which the 16 ~24~412 label is being applied. The individual labels can make up the entire web as illustrated in the arranyement of Fig. 5, or can be portions to be cut from the web as indicated in Fig. 1, but in this arrangement also no 05 carrier sheet is required, as the web 10 will be constructed in the same fashion as the web 10 illustrated in Fig. 1. Fig. 7 shows, in somewhat ~reater detail how labels in roll form as shown in Fig.
1 may be applied to box shaped products 40. rrhe roll of labels is indicated by numeral 42 and is unwound from this roll by a tractor unit 44 having a suitable sprocket feed device which engages the holes in the margins of the web 10 (the said holes are not shown in the drawings) and is fed through a removal and application station 46. The skeletal residue of the web 10 is wound into roll fornlas shown by numeral 48.
The a~hesive side of the web 10 is the upper side and all surfaces which contact this adhesive side are required to be of a nature so as not to adhere to the adhesive. Such surfaces may be defined by silicone release material.
The removal and application station 46 comprises an upper ~resure nip roller 50 (silicone coated) and a lower vacuum cylinder 52 around which the web 10 laps slightly as shown in Fig.7, and which has a plurality of circumferentially spaced ports 54 which connect with axially extendincJ passages 55, which are selectively connectable to a source of vacuum or, when at detachment position 56, with a blast of air under pressure. A valve plate 58 at one end of the cylinder controls the connection of the passage 55 to the source OL vacuum and the blast of air in that said plate 58 has an arcuate port 60 coupled to the source of vacuum and a port hole at position 56 connected to the air under pressure. In use, tne cylinder S2 rotates in the direction of arrow 62 whilst the plate 58 remains stationery and each passage 55 which registers with port 60 is connected to the source of vacuum. Each passage 55 which leaves register with slot 60 arrives 05 first at position 56 where it receives a blast of air under pressure, and then the passage is blanked off until it once more reaches the port 60.
Operation of the unit 46 will be understood from the above. The individual labels L are detached by the vacuum at the nip between roller 50 and cylinder 52, and travel round with the cylinder 52 until they reach station 56 at which they are progresively applied to the products 40 which are moving as indicated by arrow 63, in synchronism with the feed of the labels. To this end the labels and products may be fed on an indexing or continous basis, with interlinking controls ensuring that the operation proceeds only when the presence of a label and a product has been detected.
The arrangement shown in Fig. 7 could be modified to handle a roll of labels such as shown in Fig. 6, which are required to be cut from the web, and a suitable die cutting means would be provided in the region of the application station.
It is estimated that the apparatus shown inFig.7 will be capable of applying labels at the rate of approx.
200/min in part because the label roll has no backing strip.
Reference is now Made to Figures 8 to 11, which shows methods of manufacturing labels according to the invention.
Referring to Fig. 8 of the drawings, a roll 110 of stock material in which la~els are to be formed may 18 ~.2~L84~2 suitably be of a width of 450 millimetres ana thickness 80 micron, the material may be a blo~,Jn f ilm manufactured from a filled plastics material of the nature set out in British Patellt No. 1,554,143, but in 05 any event should be a non-fibrous and substantially non-extensible material. The web passes fro~n roll 110 throuyh silicone compound coating assembly 112 at which release coating is ayplied to one side (the first side) of the web, and then the web travels tt,rough a heating 10 chamber 116 which is ciivided into two compartments 118 and 120 by means of a horizontal partition 122. The release coating is cured by passiny the weo back and forth through the chamber 118 with the first side initially face downwards then face upwards. The web 15 emerges from the chamber 118, after a traverse time of 20 seconds in an envirom~ellt maintaineci at 1;~0C, ana the web is engaged by a pair of yuide rolls 124 and 126.
20 The web next passes through a pressure sensitive adhesive coater assembly 128 of the form shown which applies pressure sensitive adhesive composition t:o the other and second side of the web. The web is led by means of feed conveyor 130 into the upper neatiny 25 chamber 120 which i~ maintainea at 110C, in order to drive off the solvents o~ the adhesive coatinys, to dry same. The emergent web E~asses over guide rolls 132 and 134 (134 being silicone coated so ti~at it will not sticl; to the adhesive side or the web which it 30 contacts) and then passes throuyh aie cuttiny rolls 35, 133 (138 being silicone coatea) which ~eLine tne individual labels in the web, and the web is WOUlld into roll 140.
35 Com}!ared to conventional methods of applyin~ silicone coating to webs for the production of labels, che above equipment is extremely simple an-:l can be operate by ~2484~. 2 convertors of raw material on an in-house basis, the entire treatment having a cyle time of no more than half a minute to one minute and the overall lenyth of the apparatus being no greater than 8-10 metres. The 05 web material 110 will usually be pre-printed to define the label printed matter, and the silicone composition is applied over the printed side of the web. The rollers 124 and 126 may be the rotary die cutting rollers in order to define the individual labels in the 10 web by cutting through the web to define the labels but also to leave catch points whereby the labels remain connected to the web stock material until clisplaced therefrom, instead of rollers 134 ana 136.
15 In the arrangement shown in Fig. 9, the silicone release coating i6 an ultra violet curable ma~erial, and therefore after the coatiny is applied, tne web is passea throuyh an ultra violet dryer 140, which is cluicker and less expensive than hot air drying. The 20 adhesive is applied and dried as before.
In the arrangement of Fig. 10, both the silicone release coatiny and the adhesive are ultra violet curable and therefore there are two ultra violet driers 25 140 ancl 142 respectively for the silicone release coatiny and the adhesive, through which the web passes in turn after application of the respective coatinys.
Fig. 11 shows an arrangement similar to Fig. 10 in that ultra violet dryers are used. Only the path of travel 30 of the web is different. The parts of the apparatus in Figs 9, 10 and 11 already referred to in Fig. 8 are desiynated with the same referènce numerals. In each of the arrangements shown in Fiys 8 to 11, the web travels first through the silicone coater 112 anct 35 seconcl throucJh the adhesive coater. This order could be reversed if desired. Also, an arranyement wherein a UV dryer is u~;ed for the adhesive and a l--ot air dryer ~2~84~2:
is used for the release coating can be adopted.
another form of dryer which can be used at least for the adhesive i5 a radio frequency dryer.
05 In the production flow path in any of the apEjaratus of Figs ~ to 11, after the stage of a~plication of the adhesive, all of the rollers which contact the adhesive side are provided with a silicone coating in order to prevent sticking of the rollers to the adhesive, and of course it is possible in accordance with the invention directly to wind the web 110 after the adhesive and silicone materials have been applied in that the silicone side of the web will not adhere to the adhesive in the coiling and uncoiling of the web.
'rhe speed and simplicity of production is achieve~ ~i selecting a web material which is non-fibrous and therefore will not absorb excessive of amounts OL the silicone material, which hap~ens when paper webs are coated as in the conventinal method of produciny adhesive labels.
The web 110 may be provided with apertures in the margins thereof to enable the fee~ing of the web in the apparatus for removal of the labels from the web for application to articles before or after being coated.
The said apertures may also serve for the driving of the web through the equipment shown in Figs ~ to 11.
When the silicone coating is heat cured, the temperature at whicn the curing of the silicone coating takes place will be dictated in fact by the material of the web, tile s~eed of the web and the thickness of the coating. Clearly, althouyh the curiny tinle can be reduced by increasiny the curiny temperature, the temperature cannot be so high as to cause disirte~ratiol-~ oi the web material itself.
21 124~3~12 It is preferred that the operation will proceed on a continuouc basis, but it can be arranged to take place on a step by step basis witil dwell times during which the silicone is cured ancl the adhesive is dried.
Any suitable form of pressure sensitive adhesive can be used.
The thickness of the web can depend upon the application, but typically labels are manufactured in a thickness of approxirnately 25 to 250 microns, with the filled plastics material web being typically 80 microns. The quantity of silicone coatiny which is recluired for such labels typically would be as little as 2 yms. per square metre, whereas with paper webs as mucn as 40 gms. per square mctre may oe requirec.
As concerns the method of pro~uciny the labels, an advantage of the preferred method of the invention resides in that the polymerisable release coatincJ, which may be a silicone compound, can be polymerised in a relatively short time by virtue of the fact that the substrate web r.laterial i~ non-fibrous and therefore will not absorb the release coat material when applied.
This means that only a fraction of the an,ount of release coat material normally applied will be used (as little as S~ as compared to the conventional method) and correspondingly the curing time is significantly reduced. I~ith a slow curing time, correspondincJly simpler ancl therefore smaller machinery can be employed for the manufacture of the labels.
Tests usin~ a silicone release coatincJ material applied in aMounts of 2 gm/sq metre have shown that lO seconds in a chamber lleated to 120C achieves satisfactory cure of tne silicone release coat material.
- 22 - ~248412 SUPPLEMENTARY DISCLOSURE
1 Fig, ~ is a part-sectional side view of apparatus for applying adhesive to a roll of labels;
i~
Fig. ~4 is a side view of applicator roll shown in Fig. ~;
1~
Fig, ~ is a perspective view of the apparatus shown in Fig. ~, and Fig. ~ is a diagrammatic side elevation of the adhesive supply circuit.
The principal components of an adhesive coating unit for coating the label stock web are illustrated in Fig.
. The applicator roller 74 is shown as are two guide or path rollers 72 and 76, The application roller 74 is located vertically above a trough roller 194, and the application roller 74 and trough roller 194 are adhered together by gears 196, 198, respectively secured to the shaft of said rollers. The application roller is carried on a lever arm 200 which is pivotable by means of an air cylinder 202 through a crank 204 connected between the pis-ton of the air cylinder and the lever 200 so that the app-lication roller can be raised clear of the trough roller 194 so as not to pick up any adhesive therefrom when ad-hesive pick-up is not required.
The path rollers 72 and 76 guide the base material 32 into small arcuate contact with application roller 74, but each of the path rollers 72 and 76 can be raised and lowered by means of pneumatic cylinders 206 and 208 respectively.
Cylinder 206 acts directly on roller 72 to raise and lower sam,e, whilst cylinder 208 acts through a bell crank lever ZIV.
The function of the adhesive coating unit is to apply an even layer of water based adhesive to the material 32, and although not shown in Fig, ~3, there is a tray contain-ing the water based adhesive material and into which the roll 194 dips in order to pick up the adhesive.
~.
~248412 1 Additionally, there are doctor blades 210 for removing adhesive along the peripheral rings on the application roller, so that the adhesive will be applied to the web 32 only if desired at strip locations. In this connection it has been mentioned that the adhesive is removed from the application rollers so that the adhesive will not be applied over the sprocket holes in the base material. As many doctor blades 210 as required will be used for this purpose, depending upon the number of rolls of labels which are formed in the base material 32.
Additionally, there is a meyerbar 212 located at the top of adjustable pedestals 214 so that the meyerbar will contact the adhesive coated surface of the material 32 by a process to be explained.
Trough roller 194 and application roller 74 are 3 directly driven by means of motor 216 as shown in Fig. ~, which is geared to the shaft of the trough roller 94 by means of gears 218 and 220.
The adhesive system for the adhesive coating unit is shown in Fig. ~, and will be seen to comprise a stain-less steel tray 222 containing the adhesive and into which the trough roller dips. The tray is equipped with a pump 224, a filter 225, and a pipe system 228 and 230 to enable the adhesive to be replenished during normal operation from an adhesive reservoir 232. The pipe 228 is connected to a water supply to enable the addition of water to the ad-hesive reservoir, and shut-off valves 232 and 234 are provided in the pipes 230 and 228 for control purposes.
An overflow 236 from the tray 222 leads to a down pipe 238 which returns overflow adhesive to the adhesive reservoir 230.
The meyerbar 212 controls the amount of adhesive applied to the base material. The meyerbar is a small diameter wire wound rod (similar in appearance to a threaded bar). The weight of the coated adhesive applied is directly propor-tionate to the meyerbar wire size, and any suitable size of ~248at~L2 1 meyerbar may be used depending upon the application. During operation the meyerbar is driven by an air motor and rotates in a direction against the flow of the material. this con-traflow rotation scrapes up excess adhesive into a tray located under the meyerbar.
During normal operation the tray 222 is half full of adhesive and is in an elevated position. The roller 194 is partially immersed in the adhesive and as it turns it trans-fers adhesive to the application rollers 74. Path rollers 72 and 76 are in a down position allowing the material to run as shown in Fig. ~3 in contact with the application roller. As the base material 32 moves through the unit it is charged with adhesive by the application roller 74 and then passes to the meyerbar 212 where the rotating meyerbar removes excess adhesive and the adhesive coated base material con-tinues from the path roller 76 to a radio frequency dryer unit (not shown). When it is necessary to stop the adhesive coating operation, the path rollers 76 and 72 raise the material away from the application roller 74. This is achieved by a control system as a two-step function. The roller 72 is raised first, followed by the raising the roller 76. This ensures that all the adhesive applied to the material 32 is scraped by the meyerbar.
Reference is also made specifically to Fig. ~ which shows the label stock material 32 and how it is provided with edge sprocket holes 32A. This figure also shows the evenly pitched labels 32B which are printed on the web 32 at regular intervals and in registry with the sprocket holes 32A. The figure also shows clearly the meyerbar 212 and the guide roller 76, and an additional guide roller 76A has been shown in order to indicate the reverse side of the web 32 and on which the adhesive strip 85 is applied. The width of the adhesive strip is as described herein set by the doctor blades ~, which are adjustable axially of the roller 74 to ensure that adhesive does not come into contact with the underside of the web 32 in the region of the sprocket holes 32A.
~48~2 1In the arrangement illustrated in Fig, ~, only a `-1 sample row of labels 32B is indicated, but the web may be printed with parallel rows of labels, and they will be twin rows of sprocket holes between adjacent rows or labels so that when the web is eventually cut into individual rows there will be sprocket holes to each side of each roll of labels. Again appropriate doctor blades may be used to ensure that the adhesive strip 85 which is applied to each roll does not extend to the sprocket holes at the web edges.
It will be seen that the adhesive application unit of the supplementary disclosure presents a number of signi-ficant features, namely that the adhesive is put on by an applicator roller in amounts more than required, and subsequently is scraped by the meyerbar. Additionally, when the operation is to be stopped, steps are taken to ensure that the material is removed from the application roller in a particular fashion to ensure that all applied adhesive is scraped by the meyerbar.
Claims (9)
1. Self adhesive label stock material which is wound into roll form and can be unwound for use comprising a substrate label web which on one side is printed with repeating and equally pitched label information so that individual labels can be taken therefrom and applied to products, and having sprocket holes for engagement with a sprocket member as the substrate passes through appli-cator apparatus, said holes being pitched in register with the pitching of the printing, a self adhesive coating covering only a fraction of the whole of the surface area of one side of the substrate to increase the ease with which the labels can be applied to the products, and wherein there is a release surface which contacts the other side of the adhesive when the stock material is in roll form ensuring that the adhesive will remain adhered to the substrate web when the material is unrolled.
2. Adhesive labels according to claim 1, wherein said web has either perforations defining individual labels which can be removed one by one, or having no cuts or other lines of weakening therein.
3. Adhesive labels according to claim 1, wherein the web is die cut to define individual labels therein and the release coating is applied over the cuts to provide extra retention strength holding the labels together or to the remainder of the web.
4. Adhesive labels according to claim 1, 2 or 3, wherein the web is of a synthetic resinous material containing an introganic filler such as talc or chalk.
5. Adhesive labels according to claim 1, 2, or 3 wherein the labels are printed prior to the application of the release coating.
6. Adhesive labels according to claim 1, 2 or 3, wherein the release coating is applied in quantities in the order of 0.1 to 1.5 grams per sq. metre.
CLAIMS SUPPORTED BY SUPPLEMENTARY DISCLOSURE
CLAIMS SUPPORTED BY SUPPLEMENTARY DISCLOSURE
7. Self adhesive label stock material which is wound into roll form without a backing web and can be unwound for use comprising:-a) substrate web;
b) printing on the web defining evenly pitched labels on at least one of the sides of the web;
c) a release coating on one side of the web;
d) sprocket drive holes at each edge of the web in register with the label printing for the driving of same through an applicator mechanism;
e) pressure sensitive adhesive on the side of the web opposite said release coating, said adhesive extending widthwise of the web to at least the same extent as the label printing, but clear of the sprocket holes, whereby the labels can be applied to moving articles by being fed continuously through an applicator machine which cuts the labels individually from the web by being passed through two rotating rollers defining a nip, and of which rollers one has cutting die means and the other is an anvil roller.
b) printing on the web defining evenly pitched labels on at least one of the sides of the web;
c) a release coating on one side of the web;
d) sprocket drive holes at each edge of the web in register with the label printing for the driving of same through an applicator mechanism;
e) pressure sensitive adhesive on the side of the web opposite said release coating, said adhesive extending widthwise of the web to at least the same extent as the label printing, but clear of the sprocket holes, whereby the labels can be applied to moving articles by being fed continuously through an applicator machine which cuts the labels individually from the web by being passed through two rotating rollers defining a nip, and of which rollers one has cutting die means and the other is an anvil roller.
8. A method of applying adhesive to a web substrate comprising feeding the web over an adhesive applicator roller so that the web picks up a film of adhesive there-from on one side thereof, and controlling the width of the adhesive film by means of doctor blades so that the adhesive film is stopped short of the edges of the web.
9. A method according to Claim 7, wherein the web after the adhesive film has been applied thereto, is applied over a meyerbar which monitors the adhesive film thickness before it is passed to a curing medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000510750A CA1220764A (en) | 1981-12-15 | 1986-06-03 | Self adhesive labels and the manufacture thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8137809 | 1981-12-15 | ||
| GB8137809 | 1981-12-15 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000510750A Division CA1220764A (en) | 1981-12-15 | 1986-06-03 | Self adhesive labels and the manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1248412A true CA1248412A (en) | 1989-01-10 |
Family
ID=10526627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000417832A Expired CA1248412A (en) | 1981-12-15 | 1982-12-15 | Self adhesive labels and the manufacture thereof |
Country Status (10)
| Country | Link |
|---|---|
| EP (3) | EP0387916A3 (en) |
| JP (1) | JPS58114083A (en) |
| AT (1) | ATE33075T1 (en) |
| AU (2) | AU562908B2 (en) |
| CA (1) | CA1248412A (en) |
| DE (1) | DE3278255D1 (en) |
| DK (1) | DK555282A (en) |
| ES (1) | ES8401404A1 (en) |
| NO (1) | NO824179L (en) |
| ZA (1) | ZA829173B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354588A (en) * | 1992-07-13 | 1994-10-11 | Moore Business Forms, Inc. | Linerless labels with tie coat |
| US5621020A (en) * | 1996-06-19 | 1997-04-15 | Moore Business Forms, Inc. | Release composition for printable linerless labels |
| US5674626A (en) * | 1996-06-19 | 1997-10-07 | Moore Business Forms, Inc. | Release composition for printable linerless labels |
| EP1055604A1 (en) | 1999-05-18 | 2000-11-29 | CCL Label, Inc. | Apparatus and method for cutting off labels from a label sheet adhering on a backing sheet and applying them |
| US6187128B1 (en) | 1998-01-21 | 2001-02-13 | Ccl Label Inc. | Apparatus and method for converting and applying labels |
| WO2017190244A1 (en) * | 2016-05-05 | 2017-11-09 | Labelcraft Products Ltd. | Recyclable liner for label assembly |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134832A (en) * | 1983-12-16 | 1985-07-18 | 光洋自動機株式会社 | Method of pasting tag label |
| GB2179004B (en) * | 1985-08-14 | 1989-08-31 | Instance Ltd David J | A label |
| JPS62101836U (en) * | 1985-12-13 | 1987-06-29 | ||
| US4768810A (en) * | 1986-06-23 | 1988-09-06 | Minnesota Mining And Manufacturing Company | Fanfolded tablet of a web which is separable into sheets each bearing a pressure-sensitive adhesive pattern |
| JPH0685009B2 (en) * | 1987-08-15 | 1994-10-26 | 日本碍子株式会社 | Manufacturing method of reinforcing member for optical fiber connection |
| GB2239231B (en) * | 1989-11-25 | 1994-08-24 | Ko Pack | Method and machine for integrated label making and product thereof |
| IL94642A0 (en) * | 1990-06-06 | 1991-04-15 | Linnewiel Ron | Cluster of a plurality of precut individual self-adhesive labels |
| DE4411581C2 (en) * | 1994-03-30 | 1999-09-09 | Bundesdruckerei Gmbh | PSA roll |
| JPH08160861A (en) * | 1994-12-08 | 1996-06-21 | Oaks:Kk | Groundpaperless label and its affixing device |
| JP2811052B2 (en) * | 1995-05-29 | 1998-10-15 | 大松化学工業株式会社 | Adhesive for prevention of re-sticking |
| US6383591B1 (en) | 1996-06-21 | 2002-05-07 | 3M Innovative Properties Company | Method and apparatus for adhering linerless repositionable sheets onto articles |
| US6106917A (en) * | 1997-08-20 | 2000-08-22 | Bristol-Myers Squibb Company | Container with label for hair dye |
| US6268032B1 (en) | 1997-10-03 | 2001-07-31 | 3M Innovative Properties Company | Repositionable note sheets and method of formation thereof |
| NL1009547C2 (en) * | 1998-07-03 | 2000-01-07 | Borne B V Van De | Method and apparatus for providing printed self-adhesive film. |
| GB2345685A (en) * | 1999-01-14 | 2000-07-19 | Sovereign Labelling Sys Ltd | Roll of linerless adhesive labels |
| ITMI20061083A1 (en) * | 2006-06-01 | 2007-12-02 | Irplast Spa | USE OF STICKERS IN PLASTIC FILM |
| ITUB20153700A1 (en) * | 2015-09-17 | 2017-03-17 | Andrea Barucci | ADHESIVE FOR COIN AND GLUING METHOD. |
| CN110328146B (en) * | 2019-07-10 | 2021-11-30 | 湖南工程学院 | Commodity circulation letter sorting mouth automated control device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2845728A (en) * | 1957-04-03 | 1958-08-05 | Topflight Corp | Self-destroying pressure sensitive label |
| FR1282636A (en) * | 1960-12-13 | 1962-01-27 | Continuous tape for printing and using labels | |
| FR87761E (en) * | 1965-04-01 | 1966-02-11 | Continuous labeling machine | |
| DE1930517A1 (en) * | 1969-06-16 | 1971-05-19 | American Can Co | Self adhesive price tickets |
| DE1966327A1 (en) * | 1969-08-05 | 1972-12-07 | Jones & Co Inc R A | Label strips |
| US3920122A (en) * | 1973-12-26 | 1975-11-18 | Jones & Co Inc R A | Label web and die making methods |
| JPS5141889A (en) * | 1974-10-07 | 1976-04-08 | Fujikura Ltd | Denryokukeeburuno setsuzokuhoho |
| JPS5327154A (en) * | 1976-08-25 | 1978-03-14 | Serck Industries Ltd | Heat exchanger and method of producing same |
| JPS5516620Y2 (en) * | 1977-03-07 | 1980-04-18 | ||
| US4133939A (en) * | 1977-12-16 | 1979-01-09 | Dow Corning Corporation | Method for applying a silicone release coating and coated article therefrom |
| NL7900190A (en) * | 1978-01-16 | 1979-07-18 | Cosco Ind | LABEL. |
-
1982
- 1982-12-07 AT AT82306505T patent/ATE33075T1/en active
- 1982-12-07 DE DE8282306505T patent/DE3278255D1/en not_active Expired
- 1982-12-07 EP EP19900105727 patent/EP0387916A3/en not_active Withdrawn
- 1982-12-07 EP EP85110025A patent/EP0184610A3/en not_active Withdrawn
- 1982-12-07 EP EP82306505A patent/EP0081963B1/en not_active Expired
- 1982-12-13 NO NO824179A patent/NO824179L/en unknown
- 1982-12-14 ZA ZA829173A patent/ZA829173B/en unknown
- 1982-12-14 ES ES518164A patent/ES8401404A1/en not_active Expired
- 1982-12-14 DK DK555282A patent/DK555282A/en not_active Application Discontinuation
- 1982-12-15 JP JP57221080A patent/JPS58114083A/en active Granted
- 1982-12-15 CA CA000417832A patent/CA1248412A/en not_active Expired
- 1982-12-15 AU AU91558/82A patent/AU562908B2/en not_active Ceased
-
1987
- 1987-02-12 AU AU68743/87A patent/AU581119B2/en not_active Ceased
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354588A (en) * | 1992-07-13 | 1994-10-11 | Moore Business Forms, Inc. | Linerless labels with tie coat |
| US5547738A (en) * | 1992-07-13 | 1996-08-20 | Moore Business Forms, Inc. | Linerless labels with tie coat |
| US5651852A (en) * | 1992-07-13 | 1997-07-29 | Moore Business Forms, Inc. | Method for making linerless labels with a specific tie coat |
| US5621020A (en) * | 1996-06-19 | 1997-04-15 | Moore Business Forms, Inc. | Release composition for printable linerless labels |
| US5674626A (en) * | 1996-06-19 | 1997-10-07 | Moore Business Forms, Inc. | Release composition for printable linerless labels |
| US6187128B1 (en) | 1998-01-21 | 2001-02-13 | Ccl Label Inc. | Apparatus and method for converting and applying labels |
| EP1055604A1 (en) | 1999-05-18 | 2000-11-29 | CCL Label, Inc. | Apparatus and method for cutting off labels from a label sheet adhering on a backing sheet and applying them |
| WO2017190244A1 (en) * | 2016-05-05 | 2017-11-09 | Labelcraft Products Ltd. | Recyclable liner for label assembly |
| US10706748B2 (en) | 2016-05-05 | 2020-07-07 | Labelcraft Products Ltd. | Recyclable liner for label assembly |
| US11423808B2 (en) | 2016-05-05 | 2022-08-23 | Labelcraft Products Ltd. | Recyclable liner for label assembly |
| US11587471B2 (en) | 2016-05-05 | 2023-02-21 | Labelcraft Products Ltd. | Recyclable liner for label assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0081963A2 (en) | 1983-06-22 |
| NO824179L (en) | 1983-06-16 |
| EP0081963A3 (en) | 1983-07-20 |
| EP0184610A3 (en) | 1986-12-30 |
| EP0387916A2 (en) | 1990-09-19 |
| DK555282A (en) | 1983-06-16 |
| ES518164A0 (en) | 1983-12-16 |
| JPH0563798B2 (en) | 1993-09-13 |
| ATE33075T1 (en) | 1988-04-15 |
| AU9155882A (en) | 1983-06-23 |
| ES8401404A1 (en) | 1983-12-16 |
| EP0184610A2 (en) | 1986-06-18 |
| DE3278255D1 (en) | 1988-04-21 |
| AU562908B2 (en) | 1987-06-25 |
| AU6874387A (en) | 1987-06-25 |
| AU581119B2 (en) | 1989-02-09 |
| EP0387916A3 (en) | 1990-10-17 |
| JPS58114083A (en) | 1983-07-07 |
| ZA829173B (en) | 1983-10-26 |
| EP0081963B1 (en) | 1988-03-16 |
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