Hiroharu Matsukawa, Keiso Saeki: Pressure-sensitive copying sheet. Fuji Photo Film, Sughrue Rothwell Mion Zinn & Macpeak, May 4, 1976: US03955025 (14 worldwide citation)

A pressure-sensitive recording sheet which comprises a support having thereon a color former-containing microcapsule coating, the microcapsule coating comprising at least two microcapsule layers with the mean particle size of the microcapsules in the microcapsule layer closest to the support being l ...

George W Levensalor: Barrier coat for groundwood carbonless coated paper. Great Northern Nekoosa Corporation, Hill Gross Simpson Van Santen Steadman Chiara & Simpson, September 5, 1978: US04111461 (10 worldwide citation)

Carbonless pressure sensitive copying sheet and a method of making the same, the sheet containing sufficient amounts of groundwood to normally cause yellowing when contacted with a color forming coating containing a color forming agent encapsulated in a polyamide resin. The yellowing characteristics ...

Takao Hayashi, Hiroharu Matsukawa: Method for fanning each set of multi-ply sheets. Fuji Photo Film, Sughrue Rothwell Mion Zinn and Macpeak, August 9, 1977: US04041193 (9 worldwide citation)

A method for fanning multi-ply sheets into units thereof, which comprises applying the adhesive composition to one side of a stack of multi-ply sheets, e.g., pressure-sensitive copying sheet units, and separating each unit of the sheets.

Orita Michio, Yahagi Masakichi: Pressure-sensitive copying sheet utilizing stabilized crystal violet lactone, method of making and method of making composition. Nisso Kako, February 15, 1972: US3642514 (7 worldwide citation)

A chlorinated diphenyl solvent solution of Crystal Violet Lactone as well as an emulsion for use in pressure-sensitive copying papers which contain microcapsules wherein said solvent solution is encapsulated as an internal liquid phase may be substantially prevented from becoming blue stained by the ...

Hiroshi Iwasaki, Shinsuke Irii: Microcapsules, method for their production and pressure sensitive copying sheet. Kanzaki Paper Manufacturing, Morgan Finnegan Pine Foley & Lee, November 8, 1983: US04413843 (6 worldwide citation)

The method of making microcapsules comprises performing polycondensation of an aminoaldehyde resin prepolymer in an aqueous dispersion including particles of hydrophobic core material in the presence of anion-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said part ...

Terayama Mutsuo, Yamamoto Kenji: Pressure sensitive copying paper. Yamamoto Kagaku Gosei Kabushiki Kaisha, Armstrong Nikaido & Wegner, October 29, 1974: US3844817 (4 worldwide citation)

An excellent pressure sensitive copying sheet is provided by applying as a color former certain encapsuled fluoran compounds, i.e., fluoran compounds linking in the 7-position with at least one of the two nitrogen atoms in a piperazine ring and having a dialkylamino group in the 3-position to either ...

Yamamoto Kenji, Sasaki Nobuharu, Terayama Mutsuo: 7-piperidinofluoran. Yamamoto Kagaku Gosei, April 3, 1973: US3725416 (4 worldwide citation)

Compounds and a pressure-sensitive copying sheet containing said compounds as a color-forming agent art provided said compounds have the following general formula: ##SPC1##Wherein each of R.sub.1 and R.sub.2 is independently alkyl of up to 4 carbon atoms; and each of X and Y is independently hydroge ...

Masao Kanda, Makoto Yoshida: Method of producing pressure-sensitive copying sheets. Fuji Photo Film, Sughrue Mion Zinn Macpeak and Seas, November 9, 1982: US04358067 (3 worldwide citation)

A method for producing a pressure-sensitive copying sheet which comprises winding the pressure-sensitive copying sheet having a microcapsule coating film comprising microcapsules having an average particle size of 3-8 microns and a hydrophobic oil containing 3-6% by weight of a color former at 35 kg ...

Takajiro Kawakami, Minesilo Mizuno, Akira Okushi, Michio Yasuda: Method and apparatus for manufacturing pressure sensitive copying sheet. Kanzaki Paper Manufacturing, Armstrong Nikaido Marmelstein & Kubovcik, April 18, 1978: US04085237 (3 worldwide citation)

The continuously fed paper sheet is subjected to the successive steps of coating an acceptor composition at its one side, drying, calendering with a calender comprising a metal roll and an elastic roll having a Shore hardness within the range of 65 to 90, further coating a color former composition o ...

Pressure-sensitive record element. Nashua, July 5, 1972: GB1280769-A (3 worldwide citation)

1280769 Carboxymethyl cellulose composition NASHUA CORP 24 March 1970 [9 June 1969] 14082/70 Heading C3F [Also in Division D2] A pressure-sensitive copying sheet comprises a backing sheet and a surface layer that comprises a continuous phase of the aluminium salt of carboxy-methyl-cellulose, with an ...