Abstract: A non-adhesive coated area substantially accurately coinciding with the width of a blade is formed on an adhesive sheet fabricated by forming the adhesive layer by coating an adhesive on the entire one side surface of a release sheet, scraping the adhesive layer by a blade having a suitable width to form a non-coated area in the adhesive layer, and then bonding a surface sheet to the adhesive layer having the non-coated area.

Abstract: A thermal dye-transfer recording, image-receiving sheet, comprising a support having thereon an image-receiving layer containing a butyral resin for receiving a transferred image from a coloring material-transferring sheet, is disclosed. In this image-receiving sheet, sharp recorded images can be obtained, and the images exhibit excellent storage stability and abrasion resistance.

Abstract: A heat-sensitive recording material excellent in stability of recorded images is disclosed, which comprises a support having formed thereon a heat-sensitive recording layer comprising a colorless or pale-colored basic dye and a color developer capable of forming a color upon coming into contact with the basic dye, wherein said heat-sensitive recording layer further comprises at least one compound selected from the compounds represented by following formulae (I) and (II): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 independently represent a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms.

Abstract: A method of producing cast coated paper in which a rewetted or gelled coating layer is pressed at a linear pressure of above 120 kg/cm against the highly polished finishing surface of a cast coating drum having a surface temperature of above 90.degree. C. Improved cast coating operations are secured by including in the coating composition and/or in the rewetting liquid or the gelling liquid, a releasing agent selected from the group consisting of a phosphate having a fatty hydrocarbon radical with 6 to 22 carbon atoms, an amine-salt thereof and lecithin.

Abstract: A method of detecting and sorting pieces of insulating materials admixed in small pieces of conductive materials, which comprises detecting and amplifying the surface potentials of the conductive materials and the insulating materials by a surface potentiometer on the basis of a time differentiation method, inputting the signal to a comparator, and sensing the presence of the insulating materials. This method is utilized to detect and sort plastics admixed in pulp and papermaking materials or cereals.

Abstract: An image-receiving sheet for a heat transfer recording system. The sheet comprises a substrate coated with an image-receiving layer comprised mainly of non-plate-shaped inorganic pigment and a binder. The smoothness of the image-receiving surface as determined according to TAPPI Standard T479 om-81 is 200 to 1,000 sec/10 ml, and the air permeability of the image-receiving sheet, as determined according to ASTM D726 Method B is below 500 sec/100 ml.

Abstract: A process for the production of heat-sensitive recording materials is described, comprising the steps of (1) applying to a support a coating composition comprising a color former, a color developer, and at least one of a water-soluble binder and a water-dispersible binder, to form a layer, and (2) irradiating the layer with electron beams. Images recorded on the heat-sensitive recording material exhibit superior stability. The color density of the recorded images remains stable even when the recording material is moistened with water or placed in a high humidity atmosphere. Further, even moistened recorded images do not disappear when rubbed with a finger.

Abstract: A method of producing cast coated papers having a more uniform gloss, where the coated papers are produced by the rewet casting process, by using as the adhesive in the coating composition a copolymer latex containing as one of the copolymerized components an unsaturated carboxylic acid, and by adding to the coating, as an auxiliary agent, a metallic salt from a certain group.

Abstract: A method of producing coated printing paper by the use of a blade coater. A flexible blade is pressed against a paper web carried by a backing roll, by a support member disposed on the opposite side of the blade so that the blade is bent to a specific curve. The bent blade serves to remove the excess coating applied to the paper web, with improved results. The dwell time that the coating is in contact with the paper before the excess is removed by the blade is kept to a very short period.

Abstract: A method of producing cast coated paper by a rewet or gel-casting method, which comprises wetting the back surface of the paper with water in an amount of 1 to 30 g/m.sup.2 at or before a pressing nip for pressing said coated layer against the highly polished finishing surface of a drum, thereby effectively preventing the cast coated paper from forming a CD curl (cross direction curl).

Abstract: An apparatus for forming labels from paper that has a label forming layer and a transfer carbon layer. The label layer has marks thereon having a known relationship to the intended edges of the label. A photoelectric detector activates a label cutting mechanism in response to the marks. The apparatus further includes a winding means for collecting the transfer carbon paper as well as paper trimming subsystems for facilitating the separation of the label layer from the transfer carbon layer.

Abstract: A heat-sensitive material comprising a support having formed thereon a heat-sensitive recording layer, which has a high whiteness and is suitable for use in high-speed recording, is disclosed. The heat-sensitive recording layer comprises a colorless or pale-colored basic dye and a color developing material that, when heated, reacts with the basic dye to form a color, wherein the heat-sensitive recording layer further comprises at least one heat-fusible material having a melting point in the range of 70.degree. C. to 140.degree. C. and selected from the compounds represented by following formulae (I) to (VI): ##STR1## wherein R.sub.1, R.sub.2, R.sub.5, R.sub.6, and R.sub.7 independently represent a phenyl group, a benzyl group, or a tolyl group, each of which groups may be substituted with a halogen atom; and R.sub.3 and R.sub.

Abstract: An improved aqueous coating composition for the production of cast coated paper is disclosed. The pigment component of the coating contains at least 5% by weight of cubic calcium carbonate having a mean particle size of 0.1 to 1.0 micron. When this coating composition is used the operating speed of the cast coating process is remarkably improved and a cast coated paper having excellent whiteness, gloss and printability is obtained.

Abstract: A heat-sensitive recording material comprising a support having a recording layer provided thereon, the recording layer comprising a colorless or pale-colored basic dye and a color developing material, wherein the recording layer further comprises at least one heat-fusible material represented by the formula (I) or (II): ##STR1## wherein R.sub.1 to R.sub.17 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group.

Abstract: A method and circuit for controlling the temperature of heat generating elements of a thermal transfer type thermal printing head is presented. The temperature of the thermal printing head is compared with preset low and high temperatures, within this range a normal thermal printing is effected. When the printer head temperature is high above the high preset temperature, a blower is energized in order to air-cool the printer head surface. When the printer head temperature goes lower than the preset low temperature, then the printing head is lifted up apart from the platen and thereafter all of the heat generating elements are heated up. The latter heating operation can be carried out prior to the start of the thermal transfer operation or during the thermal transfer operation by intermittently halting the operation.

Abstract: A heat-sensitive recording material comprised of a heat-sensitive layer on a support is disclosed. The layer comprises a colorless or pale-colored basic dye and a color developing material that, when heated, reacts with the basic dye to form a color. The color developing material is made of a compound having the general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently represent hydrogen or a hydroxyl group.

Abstract: A thermal recording paper having formed on a paper support a color generating layer containing a color former and a color developer that contacts the color former to generate a color, wherein the back side of the paper is treated with an inorganic salt, an anionic high molecular weight electrolyte, an electroconductive metallic compound, alumina sol, or silica sol, and has a surface electrical resistivity of not more than 5.times.10.sup.11 ohms at 25.degree. C. and 40% RH.

Abstract: A method of producing medium-grade coated paper for rotogravure printing, which paper, when printed, has fewer missing gravure dots and reproduction of gravure dots is improved.The method comprises applying the following coating composition (A) or (B) to either surface or both surfaces of base paper, the fiber content of which comprises 10 to 100 parts, by weight, high-yield pulp(s) having a 42-mesh fiber fraction content of below 30%, and 0 to 90 parts, by weight, chemical pulp(s): The coating composition (A) comprises pigments containing natural ground calcium carbonate with a specific surface area of 1.5 to 2.5 m.sup.2 /g in a proportion of 5 to (95S-137.5)% by weight ("S" represents a specific surface area (m.sup.2 /g) of natural ground calcium carbonate.), and adhesive of either alkali-sensitive synthetic resin emulsion or a mixture of alkali-nonsensitive synthetic resin emulsion and viscosity increasing agent(s).

Abstract: The method of making oil-containing microcapsules comprises the step of (1) preparing an aqueous system comprising an aqueous solution of gelatin and at least one anionic colloid material and oil droplets dispersed in said solution (2) causing coacervation in said aqueous system at a temperature above the gelation point of said gelatin to form a coacervate suspension in which each of said oil droplets is surrounded by a coacervate and (3) cooling said coacervate suspension to a temperature below the gelation points of said gelatin to form multi-nucleus capsules. During the step of cooling the coacervate suspension, aggregation of particles of oil droplets each having a coacervate therearound is controlled by an agitation flow so as to allow formation of multi-nucleus microcapsules having an average diameter within the range of 3 to 20 microns. The gelatin has an average viscosity not larger than 35 millipoise in terms of the value measured by the bloom type pipette method at 40.degree..+-.0.5.degree. C.

Abstract: The pressure sensitive recording sheet is partially desensitized by applying an improved desensitizer to a predetermined area thereof. The improved desensitizer comprises a reaction product produced by the reaction of ammonia, amines, diamines or polyamines with glycidyl esters or glycidyl ethers. The improved desensitizer is hydrophobic and soluble in an oil vehicle.