EP0879713B1 - Method for applying a coating material to sheets - Google Patents

Method for applying a coating material to sheets Download PDF

Info

Publication number
EP0879713B1
EP0879713B1 EP98113459A EP98113459A EP0879713B1 EP 0879713 B1 EP0879713 B1 EP 0879713B1 EP 98113459 A EP98113459 A EP 98113459A EP 98113459 A EP98113459 A EP 98113459A EP 0879713 B1 EP0879713 B1 EP 0879713B1
Authority
EP
European Patent Office
Prior art keywords
sheet
coating
sheets
sheet members
overlapped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98113459A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0879713A1 (en
Inventor
Mark S. Vogel
Bernard R. Pierre
Frederic A. Le Riche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0879713A1 publication Critical patent/EP0879713A1/en
Application granted granted Critical
Publication of EP0879713B1 publication Critical patent/EP0879713B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C3/00—Making booklets, pads, or form sets from multiple webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6654—Advancing articles in overlapping streams changing the overlapping figure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0808—Details thereof, e.g. surface characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0821—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by driving means for rollers or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C9/00—Applying glue or adhesive peculiar to bookbinding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C9/00—Applying glue or adhesive peculiar to bookbinding
    • B42C9/0081—Applying glue or adhesive peculiar to bookbinding applying adhesive to individual sheets for binding them together
    • B42C9/0087—Applying glue or adhesive peculiar to bookbinding applying adhesive to individual sheets for binding them together sheet shingling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B65H37/02—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for applying adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H39/00—Associating, collating, or gathering articles or webs
    • B65H39/02—Associating,collating or gathering articles from several sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H39/00—Associating, collating, or gathering articles or webs
    • B65H39/02—Associating,collating or gathering articles from several sources
    • B65H39/04—Associating,collating or gathering articles from several sources from piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed

Definitions

  • the present invention relates to an apparatus and method for applying coating material to both opposing major surfaces of a plurality of individual sheets, for example sheets of paper.
  • coating material it is necessary in certain fields to apply coating material to paper and, in some cases, to apply different coating materials to the two opposing major surfaces of the paper.
  • repositionable notes it is known to apply a primer material to one side of the paper from which the repositionable notes will be cut and to apply a low adhesion backsize, or release, material to the other side of the paper.
  • the repositionable adhesive is applied to the paper on top of the primer material.
  • the various coatings are applied to a web of paperfrom a roll. The coating materials are dispersed in solvents and coated directly on the paper.
  • the web is dried between coatings and then rewound and the coated roll is subsequently cut into sheets which are used to produce the notes.
  • the paper web is coated with materials dispersed in an organic solvent and is under tension when the coatings are applied, the tendency of the paper web to curl or wrinkle can be substantially eliminated, otherwise great care is required to balance the paper sheet's expansion during coating.
  • a process for the production of repositionable notes, in which a release material and a primer material are coated successively on opposite sides of a paper web is described in WO-A-87/05315.
  • many inks are soluble in organic solvents, but insoluble in water.
  • the overlapped sheets are then dried and fed to a second coating station in which stripes of repositionable adhesive are applied to the web-like overlapped sheets on the surface to which the primer was applied in the first coating station. Thereafter, the sheets are adhered together in a stack and trimmed to form pads of repositionable notes. In that process, curling or wrinkling of the sheets is avoided by applying the primer and LAB coatings simultaneously to both sides of the sheets and then drying both coatings simultaneously.
  • the present invention provides a method for applying a water-based coating material to both major surfaces of a plurality of sheet members according to claim 1.
  • the apparatus shown schematically in Figure 1 and 2 is specifically for use in the production of repositionable notes from sheets of any suitable substrate material, example, paper, polymeric film or foils, such as metallic foils and, in particular, for the application to individual sheets of a primer material, a low adhesion backsize (LAB) material, and a repositionable adhesive so that the sheets can subsequently be used to form repositionable notes.
  • a primer material e.g., a primer material
  • LAB low adhesion backsize
  • the apparatus has a paper path entry 1 which receives a succession of paper sheets (not shown) from any suitable source, for example a stack. From the paper path entry 1, the sheets travel in the direction indicated by the arrow 2 through a double coating station 3, a sheet overlapping station 4, a dryer 5, a sheet guiding section 6. Conveniently, the apparatus may be used in conjunction with an adhesive coating station 7.
  • the coating station 7 may be any quitable coating station, but the present invention is most conveniently used in conjunction with the coating station disclosed in co-pending United States patent application filed of even date herewtih, entitled “Method and Apparatus for Applying a Coating Material to Sheets", and commonly assigned to the Assignee of the present invention, and the contents of that co-pending application are incorporated herein by reference.
  • the output of the present invention may be stored, such as in stacked form and independently and subsequently coated with a separate coating station.
  • the control and synchronization of the drives of the various stations may be performed by a central electronic control unit (not shown), for example a Siemens PLC 135.
  • the sheets are preferably all of the same size, for example A2, and weight, for example 70 gsm.
  • the paper may be of any convenient weight, including, but not limited to papers having a weight between 45 grams per square meter (gsm) and 90 gsm.
  • the double coating station 3 comprises an upper coating station 11 1 and a lower coating station 12 located, respectively above and below the paper path. As the sheets pass through the double coating station the upper station 11 applies a coating of primer material to one side of each sheet and the lower station 12 simultaneously applies a coating of LAB material to the other side of each sheet.
  • the primer material and the LAB material are coated over substantially both major surfaces of the sheets.
  • mechanical means are used to grip and advance the sheets through the apparatus, preventing the primer and LAB to be coated over the entire major surfaces of the sheets.
  • Paper is commonly formed by accumulating paper fibers on a wire mesh or screen and compressing the accumulated fibers between the screen and a "felt" or cloth layer opposite the screen layer. This produces paper having a "wire” side and a “felt” side. It has also been found advantages to convey the sheets S through the apparatus of the present invention with the "wire” side presented for coating of the release material and the "felt” side presented for coating of the primer and ultimately for coating of the adhesive.
  • the primer material may, for example, be a water-based solution of an organic binding agent and a cleaved mineral pigment. More specifically, the primer material may be obtained by mixing approximately 3-7% by weight of the binding agent MOWIOL (Trade Mark) available from Hoechst AG, Frankfurt/Main, Germany and approximately 3-8% by weight of the pigment AEROSIL (Trade Mark) available from Degussa AG, Frankfurt/Main, Germany with approximately 90% by weight of water.
  • MOWIOL Trade Mark
  • AEROSIL Trade Mark
  • the LAB material may be any suitable material, including, but limited to, acrylate co-polymers, silicone materials, urethanes, and fluoro polymers.
  • the LAB may be a water-based solution of the material described in co-pending United States patent applicaiton Serial No. 08/040,876, filed March 31, 1994 and commonly assigned to the Assignee of the present invention, the contents of which arc incorporated herein by reference. The solution comprising typically from about 5% to about 10% solid material.
  • Other LAB materials that may be employed with the present invention include those disclosed in United States Patent Nos. 5,202,190 and 5,032,460.
  • the upper coating station 11 comprises a metering roller 13 and a coating roller 14, located above the path of the sheets of paper throught he double coating station.
  • the coating roller 14 cooperates with a coating drum 16 of the lower coating station 12 which also comprises a metering roller 17 and a transfer roller 18, all located below the paper path through the double coating station.
  • the coating drum 16 has a cut-out portion 9 of rectangular cross-section (shown in greater detail in Figure 8) which contains a conventional sheet gripper 9A (shown closed in Figure 8) for grasping sheets from the feed nip 10.
  • the drum is covered, around less than half its circumference, with a blanket 20 (not shown in Fig.
  • the coating roller 14 and coating drum 16 form a coating nip only when the blanket is located directly adjacent the coating roller 14.
  • the upper coating station 11 provides substantially full surface roll coating of primer material on the upper surface of the sheets
  • the lower coating station 12 provides substantially full surface roll coating of LAB material on the lower surface of the sheets. In each case, the portions engaged with the grippers (as described herein) are not coated.
  • a trough 15 for the printer material is formed by the surfaces of the metering and coating rollers 13, 14 adjacent the nip between the rollers and on the upper side thereof together with two opposed end walls (not shown) which engage in grooves (not shown) adjacent the ends of the rollers.
  • the primer material forms a film on the coating roller 14 and is transferred to a sheet passing underneath the roller.
  • the thickness of the primer film on the coating roller 14, and hence the amount of primer coated onto a sheet, is dependent on the viscosity of the primer and on the pressure between the metering and coating rollers 13, 14 and, for a given primer, can be adjusted by moving the metering roller towards or away from the coating roller thereby adjusting the pressure between the rollers.
  • the trough 15 is supplied with primer by nozzles 60 (see also Figure 5) which receive the primer from a tank 61 by means of a pump 62.
  • the trough 15 also has overflow outlets 63 through which excess primer is returned to the tank.
  • a trough 19 for LAB material is similarly formed between the metering roller 17 and the transfer roller 18.
  • the coating material forms a film on the transfer roller, the thickness of which can be adjusted by moving the metering roller 17 towards or away from the transfer roller 18, thereby controlling the amount of LAB material that passes from the transfer roller to the blanket covering 20 on the coating drum 16 (but not on to the remainder of the drum, which the transfer roller 18 does not contact).
  • the trough 19 is supplied with LAB material by respective nozzles 60A (sec also Figure 5) which receive the LAB material from a respective tank 61A by means of a pump 62A.
  • the trough 19 has overflow outlets 63A through which excess LAB material is returned to the tank 61A.
  • a sheet that is incoming from the feed nip 10 of the double coating station 3 will be picked-up by the gripper 9A in the drum and carried through the coating nip between the roller 14 and the blanket 20 on the drum 16 and, as the sheet passes through the nip, it will be coated on one side with the LAB material.
  • Sheet strippers (not shown) are located on the downstream sides of the coating roller and the coating drum to ensure that sheets do not wrap around either the roller or the drum but are fed out to the overlapping station 4. The next sheet from the feed roll nip 10 will be picked up and carried between the coating roller and the coating drum when the blanket covering once again moves around adjacent the roller 14.
  • the coating in the double coating station 3 is discontinuous because it occurs only when the blanket covering 20 on the coating drum 16 is adjacent the coating roller 14 (i.e. when a sheet is passing through the coating nip).
  • a typical coating weight for the LAB material on the sheets is from about 0.5 gsm to about 12.0 gsm and the coating weight of the primer material would be matched to that to ensure that the coated sheets remain flat. Because the primer and the LAB materials arc applied to the paper sheets simultaneously in the coating station and are preferably selected to have appropriately selected characteristics, such as viscosity, % solids, coating weights, the risk that the sheets will curl or wrinkle is substantially eliminated.
  • the blanket covering 20 on the coating drum 16 can be of any suitable type, for example a DuPont "CYRELL" polyurethane blanket available from E.I. DuPont Demours of Wilmington, Delaware.
  • a gripper unit 27 is positioned to take sheets as they emerge from the coating nip and deposit them on a conveyor 30 (not shown in Figure 4).
  • the gripper unit 27, which is conventional, comprises sheet grippers 28 carried on an endless chain 29 the movement of which is synchronized with the sheet feed so that a gripper 28 is positioned to receive each sheet that leaves the coating nip.
  • the blower 31 incorporates a heater (not shown) which serves to dry the LAB coating on the sheet to some extent, to prevent the sheets from sticking to the conveyor
  • the conveyor 30 is run at a slower speed than the chain 29 of the gripper unit so that each sheet is deposited on the conveyor with the leading edge of the sheet lying on top of the trailing edge of the preceding sheet, forming a pseudo-web of sheets Typically, the extent of the overlap is from about 1 centimeter (cm) to about 2 cm
  • the conveyor 30 is a vacuum conveyor connected to a source 32 of low pressure so that the sheets arc positively held on the conveyor and the overlapped relationship between them is maintained.
  • the sheets pass over an air knife 33 which is arranged to reverse the direction in which the sheets are overlapped.
  • the air knife 33 is arranged to direct a current of air at the sheets so that the trailing edge of each sheet is moved out from underneath the leading edge of the succeeding sheet and deposited instead on top of that leading edge.
  • an equivalent mechanical arrangement could be employed, for example an arrangement similar to that described in GB-A-2 166 717.
  • the double coating station 3 together with the sheet overlapping station 4 may be based on the "GUILA SPEED GS GS 8000" coater available from Billhöfer Maschinenfabrik GmbH of Love, Germany.
  • the dryer 5 is preferably a radio-frequency dryer, for example a particularly adapted version of the Model No. SP 890 GF"C" -AG manufactured by Proctor Strayfield Ltd. of Berkshire, England.
  • the dryer 5 is provided with a control unit (not shown) which adjusts the power of the dryer in accordance with the line speed of the apparatus.
  • That control unit may, for example, be a Siemens PLC 55 95U interconnected with the central electronic control unit of the whole apparatus.
  • the overlapped sheets move through the dryer 5 continuously on an endless belt 40 and are dried to attenuate the tendency of the sheets to curl but which ensures that they emerge substantially dry.
  • the use of a radio-frequency dryer is not essential and the overlapped sheets could, instead, be dried using infra-red heating or hot air.
  • the endless belt 40 could be heated to dry the sheets.
  • radio-frequency drying is preferred for its simplicity and lower energy consumption.
  • the overlapped sheets move through the guiding section 6 in which they are side registered and aligned with each other in preparation for advancement to further processing stations, such the adhesive coating station 7, previously identified as the subject of a co-pending United States patent application filed of even date herewith, entitled “Method and Apparatus for Applying a Coating Material to Sheets", and commonly assigned to the Assignee of the present invention
  • the overlapped sheets pass through a transfer nip 50 (see also Fig. 6) where they contact an endless transfer belt 51 to which an adhesive coating has previously been applied in the form of a plurality of stripes extending longitudinally of the belt.
  • the adhesive may be a pressure-sensitive adhesive, preferably a repositionable microsphere pressure-sensitive adhesive, for example as described in U.S. Patent No. 4,495,318 to Howard, or U.S. Patent No 3,691,140 to Silver.
  • Adhesives for use with the present invention also includes film-forming materials known in the art, including those containing organic solvents.
  • the adhesive is transferred in continuous stripes to the pseudo-web of overlapped sheets on the surface to which primer was applied in the double coating station 3.
  • the adhesive-coated sheets arc then pulled away from the transfer belt 51 at a vacuum roller 52 (shown in Figure 6) the interior of which is connected to a source of low pressure.
  • the removal of the sheets from the transfer belt 51 is facilitated by the direction in which the sheets overlap (i.e. by the fact that the air knife 33 has caused the leading edge of each sheet to underlap the trailing edge of the preceding sheet).
  • the sheets are held to a vacuum belt 53 which passes around the roller 52 and carries the sheets (still overlapped) out of the adhesive coating station 7 to the sheet exit 8 of the apparatus.
  • the sheets may then be stacked and trimmed to form pads of repositionable notes, for example those available under the trademark "Post-it” ® available from the Minnesota Mining and Manufacturing Company ("3M”) of St. Paul, Minnesota.
  • the sheets are paper, they could (as already mentioned) be formed of other materials, for example polymeric films or metallic foils, as previously described.
  • the sheets are preferably fed through the apparatus with the "machine direction" of the paper sheets aligned with the machine process direction; in that way, the tendency of the sheets to curl or wrinkle can be further attenuated.
  • Papers of different weights and textures can be used if desired.
  • the above description refers to a sheet size of A2
  • the described apparatus is readily adaptable to handle sheets of A4 size.
  • the above description refers to sheets of weight 70 gsm
  • the apparatus could also handle sheets of a higher weight (e.g. 90 gsm) and sheets of a lower weight (e.g. 70 gsm and possibly even as low as 45 gsm).
  • the above-described method results in the LAB coating material being applied over the printed matter on the sheets.
  • the LAB coating serves to protect the printed matter, especially against removal by the adhesive on an adjacent sheet when the sheets are subsequently stacked and cut to form pads of repositionable notes.
  • the protection offered by the LAB coating enables the use of stronger adhesives on printed notes to be considered.
  • the sheets maybe printed on after the double coating station 3, whether or not pre-printed, using any conventional printing operation.
  • the primer and LAB coating are advantageous for the primer and LAB coating to be applied to the sheets simultaneously in the double coating station 3 as described above, that is not essential.
  • the simultaneous application of the coatings is preferred, particularly when the coating materials arc water-based, since it assists in maintaining the sheets in a flat condition.
  • Fig. 7 Apparatus in which the primer and LAB coatings are not applied simultaneously is illustrated in Fig. 7.
  • the primer coating station 11 is located prior to the LAB coating station 12 and, consequently, the coating roller 14 of the upper station 11 and the coating drum of the lower station 12 both require a respective counter-pressure roller 14A, 16A.
  • the arrangement for supplying coating material to the coating roller/drum also differs from that shown in Fig. 1 in that, in each case, the metering roller 13, 17 dips into a respective tank 13A, 17A of coating material and applies the coating material to a respective transfer roller which, in turn, applies the coating material to the coating roller/drum 14, 16.
  • the remainder of the apparatus shown in Fig. 7 (comprising the overlapping station 4, the dryer 5, the guiding section 6 and the adhesive transfer station 7) is effectively as described above with reference to Fig. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
EP98113459A 1994-08-17 1995-07-13 Method for applying a coating material to sheets Expired - Lifetime EP0879713B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US29162894A 1994-08-17 1994-08-17
US291628 1994-08-17
EP95925641A EP0776273B1 (en) 1994-08-17 1995-07-13 Method and apparatus for applying a coating material to sheets

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95925641A Division EP0776273B1 (en) 1994-08-17 1995-07-13 Method and apparatus for applying a coating material to sheets

Publications (2)

Publication Number Publication Date
EP0879713A1 EP0879713A1 (en) 1998-11-25
EP0879713B1 true EP0879713B1 (en) 2001-11-07

Family

ID=23121102

Family Applications (3)

Application Number Title Priority Date Filing Date
EP95925641A Expired - Lifetime EP0776273B1 (en) 1994-08-17 1995-07-13 Method and apparatus for applying a coating material to sheets
EP98113458A Expired - Lifetime EP0882602B1 (en) 1994-08-17 1995-07-13 Apparatus for applying a coating material to sheets
EP98113459A Expired - Lifetime EP0879713B1 (en) 1994-08-17 1995-07-13 Method for applying a coating material to sheets

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP95925641A Expired - Lifetime EP0776273B1 (en) 1994-08-17 1995-07-13 Method and apparatus for applying a coating material to sheets
EP98113458A Expired - Lifetime EP0882602B1 (en) 1994-08-17 1995-07-13 Apparatus for applying a coating material to sheets

Country Status (7)

Country Link
EP (3) EP0776273B1 (pt)
JP (1) JP3772196B2 (pt)
KR (1) KR100352325B1 (pt)
AU (1) AU702685B2 (pt)
DE (3) DE69518925T2 (pt)
TW (1) TW272951B (pt)
WO (1) WO1996005066A1 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305081C2 (de) 1993-02-19 1996-08-01 Minnesota Mining & Mfg Verfahren und Vorrichtung zum Auftragen von Haftkleber auf Bogen aus Papier oder dergleichen Material
CA2247303A1 (en) * 1996-02-16 1997-08-21 Pierre R. Bernard Improved apparatus and method for applying coating materials to individual sheet members
US6406244B1 (en) 1998-07-09 2002-06-18 Frederic P. A. Le Riche Stack of sheets with repositionable adhesive alternating between opposite edges and containing one or more sheets different from other sheets
DE19903905B4 (de) * 1999-02-01 2008-04-10 Amc Pancke Ag Allied Methods Of Communication Verfahren und Vorrichtung zur Herstellung von Haftzetteln
DE10037028A1 (de) * 2000-07-28 2002-02-07 Winkler & Duennebier Ag Verfahren und Vorrichtung zum Herstellen von Papieren mit Haftkleber
GB2434332A (en) * 2006-01-24 2007-07-25 Sun Chemical Ltd Coldset web offset printing
KR100939565B1 (ko) 2009-04-30 2010-01-29 (주)진양오일씰 오일씰용 보강 씨일에 접착제를 자동으로 도포하는 장치
CN112976863B (zh) * 2021-02-03 2022-07-05 温州职业技术学院 一种财务报销单据自动黏贴装置
CN113171927B (zh) * 2021-04-25 2022-02-22 浙江蓝也薄膜有限公司 热熔胶带在线涂覆装置及工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121992A1 (de) * 1981-06-03 1982-12-23 D.I.S. Versand Service GmbH, 4830 Gütersloh "mit werbung bedruckte bogenbahn, verfahren zur herstellung eines gedruckten werbemittels aus der bedruckten bogenbahn sowie vorrichtung zur durchfuehrung des verfahrens"
ZA853021B (en) * 1984-04-30 1985-12-24 Banson Pty Ltd Pads and their formation
WO1987005315A1 (en) * 1986-02-26 1987-09-11 Erich Pagendarm Article with adhesive coating and process for its production
US5040778A (en) * 1990-07-16 1991-08-20 Ark, Inc. Apparatus for automatically inverting workpieces of limp sheet material

Also Published As

Publication number Publication date
DE69523789D1 (de) 2001-12-13
EP0882602B1 (en) 2001-11-07
AU702685B2 (en) 1999-03-04
WO1996005066A1 (en) 1996-02-22
DE69523789T2 (de) 2002-08-01
JP3772196B2 (ja) 2006-05-10
JPH10504240A (ja) 1998-04-28
DE69518925T2 (de) 2001-05-10
AU9047098A (en) 1999-03-04
KR970704585A (ko) 1997-09-06
DE69518925D1 (de) 2000-10-26
AU716836B2 (en) 2000-03-09
AU2970895A (en) 1996-03-07
EP0879713A1 (en) 1998-11-25
KR100352325B1 (ko) 2002-11-22
DE69523788T2 (de) 2002-06-13
DE69523788D1 (de) 2001-12-13
EP0882602A2 (en) 1998-12-09
EP0882602A3 (en) 1998-12-23
EP0776273B1 (en) 2000-09-20
TW272951B (pt) 1996-03-21
EP0776273A1 (en) 1997-06-04

Similar Documents

Publication Publication Date Title
US5863330A (en) Apparatus and method for applying coating materials to individual sheet meters
EP0879713B1 (en) Method for applying a coating material to sheets
US6669992B2 (en) Stack of sheets with repositionable adhesive alternating between opposite edges and containing one of more sheets different from other sheets
EP0776274B1 (en) Method and apparatus for applying a coating material to sheets
AU735850B2 (en) Stack of sheets with repositionable adhesive alternating between opposite edges and containing one or more sheets different from other sheets
AU721556B2 (en) Improved apparatus and method for applying coating materials to individual sheet members
AU711923B2 (en) Apparatus for applying a coating material to sheets
AU6541199A (en) Improved apparatus and method for applying coating materials to individual sheet members
AU3521901A (en) Stack of sheets with repositionable adhesive alternating between opposite edges and containing one or more sheets different from other sheets
AU6541399A (en) Improved apparatus and method for applying coating materials to individual sheet members

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 776273

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19990517

RTI1 Title (correction)

Free format text: METHOD FOR APPLYING A COATING MATERIAL TO SHEETS

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20001009

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LE RICHE, FREDERIC A.

Inventor name: PIERRE, BERNARD R.

Inventor name: VOGEL, MARK S.

AC Divisional application: reference to earlier application

Ref document number: 776273

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 69523788

Country of ref document: DE

Date of ref document: 20011213

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080726

Year of fee payment: 14

Ref country code: FR

Payment date: 20080729

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080729

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090713

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090713

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100707

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120201

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69523788

Country of ref document: DE

Effective date: 20120201