| Patent Number |
Title Of Patent |
Date Issued |
| D391404 |
Sheet material with random contrasting flake pattern |
March 3, 1998 |
|
| 5876643 |
Electromagnetic interference shielding |
March 2, 1999 |
| A foamed aqueous dispersion of a mixture of particulate plastics material is formed when the fibers are between 5% and 35% of the volume of the mixture, where no more than about 7% of the volume of the mixture is conductive fibers between about 7 and 20 mm long, and where any other f |
| 5639324 |
Method of making laminated reinforced thermoplastic sheets and articles made therefrom |
June 17, 1997 |
| Laminated reinforced thermoplastic sheets are made by preparing first and second porous sheets, each having 20% to 60% by weight of reinforcing fibers having a high modulus of elasticity and 40% to 80% by weight of a thermoplastic material differing from the thermoplastic material in the |
| 5572433 |
Detection of marks repetitively placed at lengthwise intervals along a web |
November 5, 1996 |
| A system is disclosed for detecting watermarks or other marks made along a web of paper at regular intervals. The watermarks are detected by a video camera activated by a frame grabbing pulse in a control loop. The video for each frame grab pulse signal is digitized and processed to dete |
| 5558931 |
Fibre reinforced thermoplastics material structure |
September 24, 1996 |
| A fibre reinforced thermoplastics material structure having a first layer which is fully consolidated with uniformly dispersed fibres and a second layer which is formed as an absorbent matrix. |
| 5495751 |
Streaming potential measuring cell |
March 5, 1996 |
| A cell for measuring electrokinetic potential, such as a streaming potential, includes a housing having an interior chamber divided into an upper compartment and a lower compartment by a filter mesh on which is formed a pad of a fibrous dispersion to be measured. The cell is of parti |
| 5364830 |
Record material using vinyl carbinol color formers |
November 15, 1994 |
| Pressure or heat sensitive record materials with color-former sublimation problems reduced or eliminated whilst not reducing the color forming capability per unit weight of color former by providing what are in effect dimers of vinyl carbinols, with the vinyl carbinol residues, linked |
| 5352495 |
Treatment of a surface by laser energy |
October 4, 1994 |
| In treating the surface of a material with laser energy by sweeping a laser beam over the surface, a substantial uniformity of energy delivery is achieved across a major portion of the transverse width of the beam by using an unfocussed beam of a ring mode configuration and preferably on |
| 5350500 |
Electrokinetic potential measurement |
September 27, 1994 |
| The measurement of electrokinetic potential is of importance in paper-making. A measuring cell (12) for a specific potential known as streaming potential of the kind disclosed in EP B1 0 079 726 is now provided with measuring electrodes (40, 42) of a metal which forms a reversible el |
| 5304242 |
Color developer composition |
April 19, 1994 |
| A colour developing composition for use in pressure-sensitive (carbonless) copying paper sets comprises an inorganic pigment extender (e.g. kaolin, talc or calcined kaolin) and a hydrated silica/hydrated alumina composite. The composition is produced by precipitating the hydrated silica/ |
| 5290672 |
Base paper for photographic prints |
March 1, 1994 |
| Resin coated photographic base paper having improved stiffness is made by co-extruding a face side resin coating having a first layer of pigmented LDPE and over it a thin layer of a stiff polymer, especially polycarbonate. An intermediate layer of a strongly adhesive polymer may be i |
| 5281266 |
Solvent compositions for use in pressure-sensitive copying paper |
January 25, 1994 |
| A solvent composition for use in pressure-sensitive copying papers comprises a mixture of vegetable oil and a mono- or di-functional ester of a fatty acid or other acid composed of a non-aromatic saturated or unsaturated straight or branched hydrocarbon chain and a single terminal ca |
| 5261954 |
Authenticatable security paper and authenticating composition therefor |
November 16, 1993 |
| A security paper authenticating system comprises, in combination, a security paper carrying both starch and an iodate salt, typically potassium iodate, and an authenticating composition comprising an acidic solution of an iodide salt, typically potassium iodide, the system being such |
| 5242749 |
Fibre reinforced plastics structures |
September 7, 1993 |
| An air permeable sheet-like structure comprising 5% to 50% by weight of reinforcing fibres, and between about 5 and about 50 millimeters long, and from 50% to 95% by weight of wholly or substantially unconsolidated particulate non-cross-linked elastomeric material, and in which the f |
| 5215627 |
Method of making a water laid fibrous web containing one or more fine powders |
June 1, 1993 |
| A method of making a fibrous web containing at least two particulate materials and which includes mixing the dry particulate materials together in a substantially dry condition, using the dry mix to form at least part of an aqueous dispersion of fibres, and draining the dispersion to for |
| 5209947 |
Process for the production of record material |
May 11, 1993 |
| A color developing material is produced by:a) gradually adding a metal silicate solution to a solution of an aluminum salt which is initially at a pH below 4 until the pH of the resulting mixture is approximately 4, thereby to induce some precipitation and to form a sol;b) gradually addi |
| 5206380 |
Divinyl carbinol or carbinol derivative chromogenic compounds |
April 27, 1993 |
| A chromogenic compound for use in pressure- or heatsensitive record material has the general formula (I):in which:R.sub.1 and R.sub.2 are the same or different and each is a group of one of the formulae (II): ##STR1## in which the benzene ring of the group of formula (IIa) is option |
| 5190909 |
Record material utilizing a vinyl carbinol or derivative thereof as a chromogenic compound |
March 2, 1993 |
| Pressure- or heat-sensitive record material utilizes a chromogenic material of the formula (I) (Ia or Ib): ##STR1## in which: one of A.sub.1 and A.sub.3 is an optionally-substituted carbocyclic aryl group and the other of A.sub.1 and A.sub.3 is either an optionally-substituted ar |
| 5188871 |
Authenticatable security paper |
February 23, 1993 |
| A security paper authenticating system comprises, in combination, a security paper carrying both starch and an iodate salt, typically potassium iodate, and an authenticating composition comprising an acidic solution of an iodide salt, typically potassium iodide, the system being such |
| 5188778 |
Process for the surafce enhancement of articles of fibre reinforced plastics material |
February 23, 1993 |
| A process for preparing a permeable sheet of glass fibre reinforced thermoplastic material for moulding into a shaped product which includes binding thereto a surface layer of particulate material which is compatible with or inert to the thermoplastic content of said sheet and which |
| 5177051 |
Pressure-sensitive copying paper |
January 5, 1993 |
| An extracted and isolated soy protein polymer is used for prevention of premature coloration in CFB pressure-sensitive copying paper which is neutral- or alkaline-sized with an alkyl ketene dimer and which utilizes an acid clay color developer composition. The soy protein polymer may be |
| 5162289 |
Pressure-sensitive copying paper |
November 10, 1992 |
| A subcoat of plastic pigment particles and a binder is provided beneath the microcapsule coating of otherwise conventional pressure-sensitive copying paper of the CB or CFB type. The plastic pigment particles may be hollow or solid. Inorganic pigment particles are preferably also present |
| 5143891 |
Divinyl carbinol or carbinol derivative chromogenic compounds and their use in record material |
September 1, 1992 |
| A chromogenic compound for use in pressure- or heat-sensitive record material has the general formula (I):in which: R.sub.1 and R.sub.2 are the same or different and each is a group of one of the formula (II): ##STR1## in which the benzene ring of the group of formula (IIa) is option |
| 5130289 |
Pressure sensitive record material |
July 14, 1992 |
| Acid sized carbonless base paper incorporating a sulphate based filler, particularly calcium sulphate, is less base reactive than otherwise similar paper made using conventional clay (kaolin) fillers. Carbonless paper, particularly CB paper, made from such base is less susceptible to |
| 5085936 |
Watermarked paper sheet for use in xerographic imaging processes |
February 4, 1992 |
| A watermarked paper sheet for use in a xerographic ion deposition or magnetographic printing process, in which the sheet has print receiving and reverse sides, the print receiving side of the sheet having a surface resistivity of between 5.times.10.sup.10 and 5.times.10.sup.12 ohms per |
| 5071821 |
Thermal record material |
December 10, 1991 |
| Thermally sensitive record material (thermal paper) using 2,2-bis(4-hydroxyphenyl)-4-methylpentane as co-reactant with conventional electron donating chromogenic compounds and a combination of a long chain fatty acid amide was melting between 80.degree. and 140.degree. C. and a sensi |
| 5062923 |
Rope system for a paper machine coating or size press section |
November 5, 1991 |
| In a papermachine coating or size press section a rope system is provided for feeding the web through the machine either initially or after a break. In an abrasive environment continuously running ropes can lead to excessive wear on the ropes. In the present invention a rope system for a |
| 5053449 |
Plastics material |
October 1, 1991 |
| An air permeable sheet-like structure comprising 20% to 60% by weight of single discrete reinforcing fibres having a high modulus of elasticity (as herein defined), and being between about 7 and about 50 millimeters long and 40% to 80% by weight of wholly or substantially unconsolidated |
| 5049420 |
Process for applying microcapsule-containing compositions to paper |
September 17, 1991 |
| Microcapsules are applied in metered quantity to a paper web passing through an ingoing nip between a hard applicator roll and a soft backing roll. Metering is achieved by means of a deformable metering roll in adjustable pressure contact with the applicator roll and rotating in an o |
| 5035844 |
Process for the production of microcapsules |
July 30, 1991 |
| In a process for the production of microcapsules by coavervation of gelatin, carboxymethyl cellulose (CMC) and a second anionic polymer such as a polyvinylmethylether/maleic anhydride copolymer or an ethylene/maleic anhydride/copolymer, the weight ratio of gelatin:CMC is chosen to be in |
| 4981636 |
Fibre reinforced plastics structures |
January 1, 1991 |
| An air permeable sheet-like structure comprising 5% to 50% by weight of reinforcing fibres, and between about 5 and about 50 millimeters long, and from 50% to 95% by weight of wholly or substantially unconsolidated particulate non-cross-linked elastomeric material, and in which the f |
| 4978489 |
Process for the manufacture of a permeable sheet-like fibrous structure |
December 18, 1990 |
| A process for the manufacture of a stiff permeable sheet-like fibrous structure which includes forming a web with 20% to 60% single fibres having a high modulus of elasticity (as herein defined) and between 7 and 50 millimeters long, and 40% to 60% by weight of a wholly or substantially |
| 4970192 |
Pressure-sensitive copying paper |
November 13, 1990 |
| Microcapsule-coated paper for use in a pressure-sensitive copying set contains a higher than conventional filler loading, namely 15% to 23%, based on the total weight of the paper. The use of filler loading levels within this range increases the maximum number of legible copies obtai |
| 4969975 |
Process for forming a sheet of material |
November 13, 1990 |
| A process for forming a homogeneous sheet from particulate elements, (as herein defined), at least some of which have an inherent vertical mobility (as herein defined) in water at normal temperature and pressure of from about 1 to about 21 cms/sec, which comprises the steps of forming a |
| 4964935 |
Method of making fibre reinforced thermoplastics material structure |
October 23, 1990 |
| A fibre reinforced thermoplastics material structure having a first layer which is fully consolidated with uniformly dispersed fibres and a second layer which is formed as an absorbent matrix. |
| 4962072 |
Pressure sensitive record material |
October 9, 1990 |
| Record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of colour former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises a binder for the pigment together with a synt |
| 4961080 |
Laser marker with mask scanning |
October 2, 1990 |
| A laser beam is used to mark a longitudinally moving web of paper both at intervals along its length and at plural locations across its width so that each of the sheets finally cut from the web bears a mark. The web passes over a cylinder having windows bearing masks carrying a logo or t |
| 4959264 |
Release paper for making artificial leather |
September 25, 1990 |
| A release paper for the manufacture of artificial leather, characterized by the release coating of the paper being essentially of a flexible poly(4-methyl pentene-1) resin (TPX) loaded with particulate mineral filler. |
| 4957805 |
Method of making laminated reinforced thermoplastic sheets and articles made therefrom |
September 18, 1990 |
| Laminated reinforced thermoplastic sheets are made by preparing first and second porous sheets, each having 20% to 60% by weight of reinforcing fibers having a high modulus of elasticity and 40% to 80% by weight of a thermoplastic material differing from the thermoplastic material in the |
| 4944843 |
Process and apparatus for forming particulate layers |
July 31, 1990 |
| A layer of particulate material is formed by forming a foamed dispersion of a particulate material, supplying the foamed dispersion to a predetermined zone of a plane through which a foraminous element is moving, applying a vacuum to said plane across the zone on the other side of the fo |
| 4925615 |
Method of molding fiber reinforced plastic articles |
May 15, 1990 |
| A process for moulding articles of fibre reinforced plastics material which includes pre-heating a sheet of consolidated thermoplastics material which has dispersed therein from 20% to 70% by weight of reinforcing fibres which have a high modulus of elasticity (as herein defined) and bet |
| 4925530 |
Loaded paper |
May 15, 1990 |
| Aqueous suspensions of papermaking fibres and filler are each separately treated with an anionic or a cationic polymer, after which the filler (preferably) or the papermaking fibre is treated with a polymer of opposite charge to that used in the initial treatment. The filler and pape |
| 4909390 |
Moisture resistant carton |
March 20, 1990 |
| A pack of paper suitable for use in xerographic, ion deposition of magnetographic printing processes, the pack including a stack of paper sheets having a moisture content of not more than 6% and a reclosable carton made of semi-stiff sheet material and comprising a container portion |
| 4898037 |
Method and apparatus for determining the propensity of a paper or board to dust |
February 6, 1990 |
| Disclosed is a method of testing the propensity of a paper or board to dust. The method is one which includes pressing a reference surface to the surface to be tested at a predetermined pressure. The dust adhering to the reference surface is then measured such that an indicative reading |
| 4882114 |
Molding of fiber reinforced plastic articles |
November 21, 1989 |
| A shaped article of fiber reinforced material is made by forming a foamed aqueous dispersion having single discrete fibers, and unconsolidated particulate thermoplastic or thermosetting material, laying down and draining the dispersion to form a web, transferring the web to an oven and |
| 4874919 |
Laser apparatus for repetitively marking a moving sheet |
October 17, 1989 |
| The energy of a laser beam (32) is used to form images at intervals along a lengthwise moving web (10). The images are formed along a plurality of axes spaced transversely of the web so that after slitting and cutting an image appears on each sheet. The laser beam (32) is directed across |
| 4868048 |
Conductive sheet material having an aqueous conductive composition |
September 19, 1989 |
| An aqueous conductivising composition for conductivising paper or other sheet material, for example for producing a conductive base for use in dielectric paper or other electrostatic imaging material, is produced by (a) removing sodium magnesium trifluoride impurity (neighborite) from a |
| 4863783 |
Security paper |
September 5, 1989 |
| Paper embodying for purposes of identification one or more pigments, inconspicuous in daylight but visible on inspection in darkened surroundings or after illumination at predetermined wavelength from an artificial source, wherein the pigment is in the form of granules which are of 3 |
| 4851384 |
Record material |
July 25, 1989 |
| A long chain fatty acid salt, for example calcium, sodium or aluminium stearate, is included in small amounts (e.g. 2 to 10% by weight) in an otherwise conventional color developer composition of which the major active ingredient is an adsorbent inorganic material. Record material co |
| 4840706 |
Method and apparatus for measuring water content |
June 20, 1989 |
| A modified infra-red scanning gauge used in measuring the moisture content of a paper-web during manufacture or when subject to a coating practice, has a measurement channel and a reference channel. The measurement channel is based on the infra-red absorption spectrum of water which has |
