WO1989000110A1 - Feuilles de transfert autocopiantes pour liasses multiples - Google Patents

Feuilles de transfert autocopiantes pour liasses multiples Download PDF

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Publication number
WO1989000110A1
WO1989000110A1 PCT/US1988/002137 US8802137W WO8900110A1 WO 1989000110 A1 WO1989000110 A1 WO 1989000110A1 US 8802137 W US8802137 W US 8802137W WO 8900110 A1 WO8900110 A1 WO 8900110A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheets
color
pack
coating
sheet
Prior art date
Application number
PCT/US1988/002137
Other languages
English (en)
Inventor
Philip M. Weinstein
Original Assignee
Weinstein Philip M
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
Priority claimed from US07/068,878 external-priority patent/US4912080A/en
Priority claimed from US07/206,108 external-priority patent/US4959343A/en
Application filed by Weinstein Philip M filed Critical Weinstein Philip M
Publication of WO1989000110A1 publication Critical patent/WO1989000110A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components

Definitions

  • This invention relates to pressure sensitive carbonless paper sheets capabl e of image formation by light impact marking means in multi-part forms packs, and to forms packs containing the sheets . Background of. the invention
  • printers are effective for data entry on carbonless forms packs of three or four parts, and in some cases even five part forms, but clarity on the last (bottom) parts is diminished when the forms packs , contain six or more parts, and data becomes illegible when eight or more copies are desired.
  • Carbonless paper is produced commercially by coating a paper sheet with a composition, preferably a hot melt composition, containing a chromogenic mate ⁇ rial which develops an image when the sheet is con- tacted with a marking force.
  • Marking forces may be either manual (such as the pressure exerted by a pen, pencil or other hand-held stylus) or machine actuated (such as the styli or characters of dot matrix or daisy wheel printers).
  • Chromagenic materials comprise color precursors, color formers, color receptors, color inhibitors and other image-generating sub— stances, including mixtures of two or more thereof, which interact chemically to develop an image.
  • a chromogenic material is encapsulated or otherwise protected by a film or other material which is ruptured by the marking force to cause contact of the chromogenic material with air or other actuating (developing) medium to induce the color change de ⁇ fining the image.
  • a chromogenic material comprises a microencapsulated color precursor either alone or suspended in a liquid color receptor (developer).
  • a second coating composition containing the color receptor is applied over the first coating, or the color receptor coating is applied to the obverse side of the sheet or to another sheet superposed on the sheet coated with the color precursor.
  • encapsulate the color receptor and main ⁇ tain the color precursor as the continuous phase in the coating (on the same surface as the color receptor or on the surface of another sheet superposed on the sheet coated with the color receptor).
  • each of the color precursor and color receptor may be encapsu ⁇ lated.
  • the interactive color forming reagents may also be isolated from one another (until brought into contact by a marking force) by other means such as an intervening rupturable sheet or film.
  • the top sheet (called the "record” sheet because it receives the marking force directly) is coated with a composi- tion containing a color receptor.
  • This coating is termed a "CF” coating.
  • the bottom sheet in the pack is coated with a composition, preferably a hot melt composition, containing microencapsulated color pre ⁇ cursor material. This coating is called a "CB” coat- ing.
  • the intervening sheets in the pack are coated on one surface with the CF coating and on the obverse surface with the CB coating. These sheets are there ⁇ fore called “CFB” sheets. Both the bottom sheet and the intervening sheets are called “transfer” sheets.
  • a single composition comprising an encapsulated color precursor dispersed in a continuous phase containing a color developer, is coated on the front surface of a paper sheet, thus defining a transfer sheet.
  • Multi ⁇ ples of such transfer sheets are superposed under a single, uncoated, top record sheet to form copies of the markings imposed on the record sheet.
  • the paper sheet which enables achievement of the foregoing advantages is primarily characterized by a basis weight of 9-12 pounds, a thickness of 40-50 microns, a Gurley porosity of 400-4000 seconds, and a Bendtsen smoothness of 90-260 ml/min on the wire side and 60-280 ml/min on the felt side. These properties have been found to control the absorbency and transfer of chromogenic material in and through a carbonless paper sheet such that even the bottom parts in a six part or more multi-ply carbonless forms pack will develop clear images with light impact, and bar codes can be transferred for good optical scannability through three or more sheets.
  • the paper sheet additionally will possess other characteristics for specific appli ⁇ cations, including suitable tensile strength, elastic modulus and opacity, and be treated with the requi- site type and quantity of sizing for use in particular environments.
  • the paper sheet should also have a requisite formation to fit each mode of use, although this property tends to be subjective and primarily visual.
  • paper sheets for use in the carbonless forms packs of the invention must have at least the following characteristics to achieve the benefits of the invention:
  • 10 weight for the purposes of the present invention is the weight in pounds of a ream of paper on a 17 X 22 scale, i.e., 500 sheets each having dimensions of 17 by 22 inches.
  • Other scales may be used to define the basis weight with concomitant adjustments in weights
  • Thickness (caliper : 40-50 microns preferably about 44-48 microns, most preferably about 42—46 microns. Thickness is conventionally measured
  • the testing instrument can be operated manually or electrically. Typical of the latter is a TMI 549M motorized micrometer operated
  • Bendtsen Smoothness 90-260 ml/min 10 (preferably about 170-260 ml/min, most preferably about 90-170 ml/min) on the wire (bottom) surface and 60- 280 ml/min (preferably about 120-240 ml/min, most preferably about 60-120 ml/min) on the felt (top) surface. Smoothness is necessary for good 5 printability of forms indicia. The smoother a surface, the higher the Bendtsen value and the more uniform the ink layer will be. Good smoothness also reduces the amount of coating required to deposit a chromogenic material and thereby improves image tran- 0 sfer.
  • Bendtsen units are the European measure of smoothness: Elsewhere, smoothness is more usually measured in Sheffield units.
  • the units are correlatable. Measurements are made both on the bottom (wire side) of the sheet and on the top (felt 5 side), the former being the surface in contact with the paper forming wire and the latter being the opposing side, usually in contact with a felt layer on a belt.
  • the units of measurement are milliliters (cc) of air passing per minute over one square inch of surface area. The measurement is an average of a plurality of measurements at uniform intervals across a sample.
  • tensile strength the force to break ⁇ age measured as grams per inch in the machine direc ⁇ tion or in the cross direction of the paper
  • elastic modulus stretch
  • opacity measured as percent re ⁇ flectance of light (TAPPI method)
  • brightness also a percent reflectance of light but with color disregar ⁇ ded (ISO method)
  • Ash measure of the amount of additive in the paper (such as filler, clay and/or titanium dioxide) measured as a percentage of the area of a piece of paper which burns to ash
  • ⁇ 5 forms packs: opacity (TAPPI) - 83-90%, preferably about 85%; brightness (ISO) - 75-88%, preferably about 84%; tensile strength - at least 8000 g/in, preferably about 9300 g/in; ash - 8-23%, preferably about 18%; stretch - 0.8-1.6%, preferably about 1.4%; and Cobb
  • Wire side Felt side Coating compositions containing chromogenic materials as well as techniques for applying the com ⁇ positions, particularly by hot melt coating, are well known, as described, for example, in the ⁇ . S. Patents cited above.
  • One commercial system for manufacturing carbonless paper from base paper stock having the characteristics set forth above is the OPAS ( On/Off Press Application System) marketed by Mead Paper, a division of Mead Corporation.
  • the OPAS system in ⁇ cludes a standard off-set printing tower to apply CF coating on the front (top) of the paper web, and a hot melt coater to apply a CB coating on the back of the paper. Both operations can be effected simultaneously with printing of the paper.
  • the intermediate sheets are coated on the front surfaces with a CF coating containing a color receptor to receive the image from the preceding sheets, and are hot melt coated on the back surfaces with a CB activator (colorless dye precursor) for transfer of the image to the succeeding sheets.
  • a CB activator colorless dye precursor
  • Typical CF and CB coatings as well as CFB transfer sheets are described in detail in the patents cited above, such as U. S. Patent 4,143,890 the des ⁇ cription of which is incorporated herein by reference.
  • ⁇ . S. Patent 4,143,890 there are described pre ⁇ ferred chromogenic materials useful in the present invention, such as a color precursor of the electron donating type and a color receptor of the electron accepting type, but other types of chromogenic mate ⁇ rials may be employed in the coating compositions of 5 the present invention.
  • carbonless transfer sheets and forms packs of the invention may comprise several
  • a transfer sheet of the invention will comprise a paper sheet having the basis weight
  • the chromo ⁇ genic material may be "self-contained", that is, may
  • the chromogenic material in one coating may be a color precursor and the chromogenic material in the coating on the obverse surface or on the surface of another sheet may be a color receptor.
  • one or both of the color precursor and color receptor will be encapsulated or some other temporary barrier will be maintained therebetween.
  • the barrier is ruptured by impact with a marking means during data entry on the sheet, causing contact between the color precursor and colo receptor, and consequent chemical interaction and color formation in a configuration defined by the marking stylus.
  • the forms pack is a two-part pack only, one surface of the first sheet may contain either the color precursor or the color recep ⁇ tor chromogenic material and the other sheet may be coated with the other of the color precursor and color receptor chromogenic material.
  • Such transfer sheets may be of the CFB type or the self-contained type.
  • forms packs of at least six and preferably eight to twelve or more parts can be used to record information clearly in all of the parts when using light impact force or printing equipment such as daisy wheel and dot matrix printers, and bar codes can now be transferred with good scann- ability through carbonless forms packs containing three or more of the sheets.

Landscapes

  • Color Printing (AREA)

Abstract

On confère à des feuilles de transfert autocopiantes sensibles à la pression la capacité de produire des images claires grâce au marquage par léger impact dans des liasses autocopiantes multiples contenant au moins six des feuilles, telles que 8 à 12 feuilles, par enduction d'une matière chromogène sur une feuille de papier caractérisée par un poids de base allant de 9 à 12 lbs, une épaisseur de 40 à 50 millimètres, une porosité de Gurley allant de 400 à 4000 secondes, et un lissé de Bendtsen allant de 90 à 260 ml/min du côté envers et allant de 60 à 280 ml/min sur le côté supérieur. On peut également transférer des codes barres ayant une bonne aptitude au balayage à travers des liasses contenant trois feuilles et plus.
PCT/US1988/002137 1987-07-01 1988-06-24 Feuilles de transfert autocopiantes pour liasses multiples WO1989000110A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US068,878 1987-07-01
US07/068,878 US4912080A (en) 1987-07-01 1987-07-01 Carbonless transfer sheets for multi-part forms packs
US7246587A 1987-07-13 1987-07-13
US072,465 1987-07-13
US07/206,108 US4959343A (en) 1987-07-01 1988-06-17 Carbonless transfer sheets for multi-part forms packs
US206,108 1988-06-17

Publications (1)

Publication Number Publication Date
WO1989000110A1 true WO1989000110A1 (fr) 1989-01-12

Family

ID=27371440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/002137 WO1989000110A1 (fr) 1987-07-01 1988-06-24 Feuilles de transfert autocopiantes pour liasses multiples

Country Status (2)

Country Link
CA (1) CA1296897C (fr)
WO (1) WO1989000110A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0357187A2 (fr) * 1988-07-01 1990-03-07 The Wiggins Teape Group Limited Papier d'enregistrement sensible à la pression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097619A (en) * 1976-05-07 1978-06-27 The Mead Corporation Manifold carbonless form and process for the continuous production thereof
US4112138A (en) * 1976-05-07 1978-09-05 The Mead Corporation Manifold carbonless form and process for the production thereof
US4162165A (en) * 1977-06-16 1979-07-24 The Mead Corporation Process for the production of microcapsular coating compositions containing pigment particles and compositions produced thereby
US4186243A (en) * 1976-02-25 1980-01-29 Ciba-Geigy Corporation Image producing system
US4343494A (en) * 1980-06-16 1982-08-10 Frye Copysystems, Inc. Carbonless copy paper system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186243A (en) * 1976-02-25 1980-01-29 Ciba-Geigy Corporation Image producing system
US4097619A (en) * 1976-05-07 1978-06-27 The Mead Corporation Manifold carbonless form and process for the continuous production thereof
US4112138A (en) * 1976-05-07 1978-09-05 The Mead Corporation Manifold carbonless form and process for the production thereof
US4162165A (en) * 1977-06-16 1979-07-24 The Mead Corporation Process for the production of microcapsular coating compositions containing pigment particles and compositions produced thereby
US4343494A (en) * 1980-06-16 1982-08-10 Frye Copysystems, Inc. Carbonless copy paper system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0357187A2 (fr) * 1988-07-01 1990-03-07 The Wiggins Teape Group Limited Papier d'enregistrement sensible à la pression
EP0357187A3 (fr) * 1988-07-01 1991-05-15 The Wiggins Teape Group Limited Papier d'enregistrement sensible à la pression
US5084431A (en) * 1988-07-01 1992-01-28 The Wiggins Teape Group Limited Pressure-sensitive copying paper

Also Published As

Publication number Publication date
CA1296897C (fr) 1992-03-10

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