US3303045A - Pressure sensitive inked fabric and method of making - Google Patents
Pressure sensitive inked fabric and method of making Download PDFInfo
- Publication number
- US3303045A US3303045A US313803A US31380363A US3303045A US 3303045 A US3303045 A US 3303045A US 313803 A US313803 A US 313803A US 31380363 A US31380363 A US 31380363A US 3303045 A US3303045 A US 3303045A
- Authority
- US
- United States
- Prior art keywords
- filaments
- pressure
- fabric
- composition
- caliper
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J31/00—Ink ribbons; Renovating or testing ink ribbons
- B41J31/02—Ink ribbons characterised by the material from which they are woven
- B41J31/04—Ink ribbons characterised by the material from which they are woven woven from synthetic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/16—Molding foamed polypropylen articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31844—Of natural gum, rosin, natural oil or lac
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31931—Polyene monomer-containing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2008—Fabric composed of a fiber or strand which is of specific structural definition
Definitions
- the present invention relates to novel inked fabrics for duplicating purposes such as typewriter ribbons, chain printer ribbons and the like, and to the novel method for preparing such inked fabrics.
- Conventional inked fabric ribbons comprise a number of filaments of natural or synthetic polymer which are matted into fabrics or which are more commonly wound together to form multi-filament strands which are woven into fabrics and impregnated with a conventional fluid ink comprising oil and coloring matter.
- Such ribbons are constantly being improved to some degree from the standpoint of increasing their ink capacity without degrading their imaging properties with respect to sharpness and cleanliness, but such improvements are relatively minor in view of the basic limitations arising from the size and number of filaments which can be used in such conventional ribbons and the fact that any variation in the denier or caliper of a fabric ribbon generally results in an improvement of the writing properties and a reduction of the ink capacity, or vice versa.
- the porosity of the present ribbons permits the type bar or similar imaging device to compress the ribbon so that the ribbon conforms to the shape of the image on the imaging device in the impressed areas and the duplicate image formed on the copy sheet is of exceptional sharpness and cleanliness and free of background staining.
- FIGURE 1 is a diagrammatic side view, to an enlarged scale, of a porous filament from which the woven fabric ribbons of the present invention are woven, and
- FIG. 2 is a diagrammatic side view, to a diminished scale, of an inked woven fabric ribbon prepared according to the present invention.
- the present porous filaments may be formed s9 as to be several times lighter in weight or denier than conventional filaments of equal caliper, and thus fabrics formed therefrom are also several times lighter in weight or denier than conventional fabrics of equal caliper or thickness.
- the filaments used for weaving, matting or otherwise forming the ink-impregnated fabrics of the present invention may be based upon any of the synthetic plastic materials which are conventionally extruded in the form of thin filaments.
- the syn thetic plastic material Prior to the extrusion process, the syn thetic plastic material is uniformly compounded with an amount of a pore-forming agent which may be a liquid or a gas but is preferably a finely powdered solid.
- a pore-forming agent which may be a liquid or a gas but is preferably a finely powdered solid.
- the formed filaments have a porous or heterogeneous structure due to the fact that the pore-forming agent is liberated in the course of the extrusion process to leave pores or vacuities or open spaces and passages throughout the filaments.
- Filaments formed in this manner are from two to ten or more times lighter than solid filaments of similar caliper or thickness but formed in conventional manner in the absence of pore-forming agents.
- Such light filaments may be woven or matted into fabrics of extreme lightness and high ink capacity.
- the porous filaments may first be longitudinally stretched to form two to five or more times their extruded length in order to reduce their caliper to any desired thickness and also to smooth the filament surface to some extent and reduce the size of any surface imperfections caused by the release of the poreforming agent without destroying the pore structure of the filaments.
- Fabrics woven from such porous stretched filaments are found to have high strength even though the filaments are of extremely fine caliper, and such fabrics are found to possess exceptionally good imaging properties with respect to sharpness and clarity.
- the filaments used according to this invention may be formed of any of the conventional extrudable film-forming synthetic plastic materials including the polyolefins such as polyethylene and polypropylene; vinyl resins such as polystyrene, polyvinyl chloride, polyvinyl acetate and copolymers thereof, polyvinylidene chloride and the like; polyamides such as nylon; polyethylene terephthalate polyester (Dacron); polyacrylonitrile (Orlon); and cellulosic plastics such as rayon acetate and the like.
- polyolefins such as polyethylene and polypropylene
- vinyl resins such as polystyrene, polyvinyl chloride, polyvinyl acetate and copolymers thereof, polyvinylidene chloride and the like
- polyamides such as nylon
- Polyacrylonitrile (Orlon) polyacrylonitrile
- cellulosic plastics such as rayon acetate
- the pore-forming agents used according to the invention may be gaseous materials such as Freon, nitrogen, ammonia, carbon dioxide and the like; volatile liquids which are nonsolvents for the particular plastic used in combination therewith, such as water, toluene, ethanol, ammonium hydroxide and the like; or more preferably solid materials which decompose at the elevated temperatures of the extrusion process to liberate such gaseous or volatile liquid materials.
- the pore-forming agents are always liberated in the extrusion process in the form of gases. They are uniformly dispersed in the extrusion composition prior to extrusion and are maintained in a finely dispersed state due to the elevated pressures maintained in the extrusion machine.
- the gases are liberated to leave behind a porous network within the formed fibers.
- the pore-forming agent is a volatile liquid or heat-decomposable solid
- the temperature at which the extrusion composition is maintained within the extrusion machine to melt the synthetic plastic generally between about C. and 300 C., is sulficient to vaporize or decompose the agent to form the gases which are maintained dispersed throughout the composition due to the existing pressure which may range anywhere from slightly above atmospheric pressure to a pressure of 40 or 50 atmospheres.
- the preferred pore-forming agents are solid powder compositions which are commercially available and which decompose at elevated temperatures to evolve a gas.
- Illustrative materials include p,p0xy-bis (benzenesulfonyl hydrazide) which is sold by Naugatuck Chemical Co. under the trademark Celogen, N,N dimethyl-N,N' dinitroso terephthalamide, diazoaminobenzene, dinitrosopentamethylenitetramine and various other known blowing agents which decompose at temperatures above about 90 C. to evolve a gas such as nitrogen, a nitrogen oxide, carbon dioxide, water vapor or the like.
- the amount of pore-forming agent used depends to a large degree upon the nature of the plastic and pore-forming materials used and the strength and ink capacity desired.
- the pore-forming agent may be added in amounts ranging from about 0.01 to 15 parts by weight based upon the total weight of the extrusion composition.
- the prefer-red range is from about 1 to about '5 parts by weight.
- the present filaments are formed by adding the desired amount of pore-forming agent, preferably in the form of finely divided solid particles, to the plastic material which is also preferably in solid particulate form.
- the mixture is agitated to obtain uniform dispersion and is then introduced into the extrusion machine where the high temperatures melt the plastic material and reduce the poreforming agent to a gas which is maintained dispersed within the plastic material by the elevated pressure in the extrusion machine.
- the mixture is then extruded in conventional manner through small orifices and the gaseous agent escapes from the extruded filaments leaving behind a porous ink-receptive network within each filament.
- the filaments are then passed through a liquid coolant such as water or a salt solution and may thereafter be woven or matted into fabrics.
- a liquid coolant such as water or a salt solution
- the filaments may be stretched by passing them over rollers, contacting them with steam or other warm atmosphere, and then causing a tension to be drawn between the rollers to stretch the filaments to the desired degree whereby the caliper and denier of the filaments is reduced while the porosity thereof is also reduced but is still maintained.
- Such stretching processes are conventional in the art with solid filaments.
- the porous filaments are either extruded or thereafter stretched so as to form filaments having a denier ranging between about 0.5 and 4. Such filaments are then matted to for-m fabrics or more preferably are twisted together in groups of from about to 40 to form multifilament strands which are then woven together or in admixture with strands of conventional solid filaments to form fabrics of exceptional lightness and ink capacity.
- the fabric is then impregnated in conventional manner with a conventional liquid ribbon ink composition such as oil and coloring matter and will absorb from two to four or more times as much ink as conventional ribbons of equal caliper.
- a conventional liquid ribbon ink composition such as oil and coloring matter and will absorb from two to four or more times as much ink as conventional ribbons of equal caliper.
- the ink is held not only on the surface of the filaments and in the spaces between the filaments and strands, as is the case with conventional ribbons, but also within the porous network of each of the filaments.
- the ink so retained is squeezed from the filaments under pressure and the excess ink is then reabsorbed by the filaments and distributed by capillary action so that the imaging strength of the ribbon tends to remain uniform and the effective life of the ribbon is extended due to the migration of ink from the unused to the used parts of the ribbon.
- the present invention is concerned primarily with the production of woven typewriter ribbons which generally have a width of about 0.5 inch, it should be understood that the invention also applies to the production of non-woven matted or felted fabric ribbons and to ribbons for use in other duplicating machines such as chain printers and the like in which case the ribbons are of the required width which ranges in many cases up to 13 or more inches.
- a novel pressure-sensitive inked fabric material comprising a multiplicity of interconnected filaments consisting essentially of synthetic plastic material, said filaments being stretched to increase their strength and to reduce their caliper and surface irregularities and containing an internal porous network of open interconnected cells and having within the cells thereof a liquid, pressure-exudable ink composition said fabric material having an ink capacity at least twice as great as conventional fabrics of equal caliper and having improved imaging properties due to the strength and compressibility of the stretched porous filaments under the effect of imaging pressure.
- a novel pressure-sensitive inked fabric material according to claim 1 in which the filaments are matted together in the fabric.
- a novel pressure-sensitive inked fabric material according to claim 1 in which the filaments are woven together in the fabric.
- a novel pressure-sensitive inked fabric material according to claim 1 in which the filaments are present in multi-filament threads which are woven together in the fabric.
- a novel pressure-sensitive inked fabric material according to claim 6 in which the filaments have a denier of from about 0.5 to 4 and the threads contain from about 10 to 40 filaments each.
- the method of making pressure-sensitive inked fabric materials which comprises the steps of preparing an extrudable fiber-forming composition by uniformly mixing a composition consisting essentially of synthetic plastic and from 0.01 to 15 parts by weight of a blowing agent which is a gas at temperatures above about C., heating said composition to a temperature above about C.
- said filaments containing an internal porous network of open interconnected cells, longitudinally stretching said filaments to increase their strength, reduce their caliper and reduce their surface irregularities, forming said filaments into a fabric, and impregnating said fabric with a liquid ink composition which is absorbed within the cells of the synthetic plastic filaments and which is exudable therefrom under the effects of imaging pressure, said fabric material having an ink capacity at least twice as great as conventional fabrics of equal caliper and having improved imaging properties due to the strength and compressibility of the stretched porous filaments under the effects of imaging pressure.
- the method of making pressure-sensitive inked fabric materials which comprises the steps of preparing an extrudable fiber-forming composition by uniformly mixing a composition consisting essentially of synthetic plastic and from 0.01 to 15 parts by weight of a solid particulate blowing agent which evolves a gas when heated to temperatures above about 90 C., heating said composition to a temperature above about 125 C.
- said filaments containing an internal porous network of open interconnected cells, longitudinally stretching said filaments to increase their strength, reduce their caliper and reduce their surface irregularities, forming said filaments into a fabric, and impregnating said fabric with a liquid ink composition which is absorbed within the cells of the synthetic plastic filaments and which is exudable therefrom under the effects of imaging pressure, said fabric material having an ink capacity at least twice as great as conventional fabrics of equal caliper and having improved imaging properties due to the strength and compressibility of the stretched porous filaments under the effects of imaging pressure.
- the method of making pressure-sensitive inked fabric materials which comprises the steps of preparing an extrudable fiber-forming composition by uniformly mixing a composition consisting essentially of synthetic plastic and from 0.01 to 15 parts by weight of a blowing agent which is a gas at temperatures above about 90 0., heating said composition to a temperature above about 125 C.
- said filaments containing an internal porous network of open interconnected cells, longitudinally stretching said filaments to increase their strength, reduce their caliper and reduce their surface irregularities, twisting said filaments together to form multi-filament threads, weaving said filaments to form a fabric, and impregnating said woven fabric with a liquid ink composition which is absorbed within the cells of the synthetic plastic filaments and which is exudable therefrom under the effects of imaging pressure, said fabric material having an ink ca pacity at least twice as great as conventional fabrics of equal caliper and having improved imaging properties due to the strength and compressibility of the stretched porous filaments under the effects of imaging pressure.
- the method of making pressure-sensitive inked fabric materials which comprises the steps of preparing an extrudable fiber-forming composition by uniformly mixing a composition consisting essentially of solid particulate synthetic plastic and from 0.01 to 15 parts by weight of a solid particulate blowing agent which evolves a gas when heated to temperatures above about C., heating said composition to a temperature above about C.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Impression-Transfer Materials And Handling Thereof (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1050711D GB1050711A (sv) | 1963-10-04 | ||
US313803A US3303045A (en) | 1963-10-04 | 1963-10-04 | Pressure sensitive inked fabric and method of making |
CH942764A CH443363A (de) | 1963-10-04 | 1964-07-17 | Druck- bzw. schlagempfindliches Farbband und Verfahren zu dessen Herstellung |
DE19641436635 DE1436635A1 (de) | 1963-10-04 | 1964-09-23 | Druckempfindlicher,eingefaerbter Stoff und Verfahren zu seiner Herstellung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US313803A US3303045A (en) | 1963-10-04 | 1963-10-04 | Pressure sensitive inked fabric and method of making |
Publications (1)
Publication Number | Publication Date |
---|---|
US3303045A true US3303045A (en) | 1967-02-07 |
Family
ID=23217216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US313803A Expired - Lifetime US3303045A (en) | 1963-10-04 | 1963-10-04 | Pressure sensitive inked fabric and method of making |
Country Status (4)
Country | Link |
---|---|
US (1) | US3303045A (sv) |
CH (1) | CH443363A (sv) |
DE (1) | DE1436635A1 (sv) |
GB (1) | GB1050711A (sv) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3516896A (en) * | 1966-05-31 | 1970-06-23 | Jean Leon Laurent | Fabric with elastic warp,treated for the purpose of improving speed |
US3520766A (en) * | 1967-02-14 | 1970-07-14 | Columbia Ribbon Carbon Mfg | Ink and dye receptive fabric and process for making the same |
US3542909A (en) * | 1966-08-02 | 1970-11-24 | Shell Oil Co | Production of fibrous filamentous products |
US3620802A (en) * | 1969-12-08 | 1971-11-16 | Columbia Ribbon Carbon Mfg | Duplicating ribbons and process |
US3957936A (en) * | 1971-07-22 | 1976-05-18 | Raduner & Co., Ag | High temperature process for modifying thermoplastic filamentous material |
US4054550A (en) * | 1974-04-11 | 1977-10-18 | Monsanto Limited | Process for producing cigarette filters |
US4201813A (en) * | 1976-01-14 | 1980-05-06 | Brumlik George C | Cellular linear filaments with transverse partitions |
US4307152A (en) * | 1977-12-12 | 1981-12-22 | Akzona Incorporated | Hydrophilic polyester fiber and process for making same |
DE3409788A1 (de) * | 1983-08-01 | 1985-02-21 | Albany International Corp., Menands, N.Y. | Papiermaschinenbespannung |
US4522955A (en) * | 1981-05-29 | 1985-06-11 | Sumitomo Chemical Company, Limited | Highly foamed polypropylene product and an extrusion process for forming the product |
US4858629A (en) * | 1986-05-09 | 1989-08-22 | S.P.T. S.R.L. | Increased volume synthetic fibres, procedure for producing them and their use, in particular for filters |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK492778A (da) * | 1978-11-03 | 1980-05-04 | Eternit Fab Dansk As | Kompositmateriale |
DE3214305C2 (de) * | 1981-06-27 | 1984-08-02 | Pelikan Ag, 3000 Hannover | Überlappend überschreibbares Farbband |
IE74876B1 (en) * | 1989-03-06 | 1997-08-13 | Fujitsu Isotec Ltd | Ink ribbon for printer and ink therefor |
US5259875A (en) * | 1989-03-06 | 1993-11-09 | Fujitsu Isotec Limited | Ink ribbon for printer and ink therefor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1427330A (en) * | 1922-05-08 | 1922-08-29 | Rousset Jules | Manufacture of hollow artificial textile articles |
US2167990A (en) * | 1936-02-28 | 1939-08-01 | Underwood Elliott Fisher Co | Typewriter ribbon |
US3022880A (en) * | 1959-11-16 | 1962-02-27 | Columbia Ribbon & Carbon | Novel transfer media |
US3117018A (en) * | 1958-11-03 | 1964-01-07 | Strauss Eugen | Color transfer medium and method of producing the same |
-
0
- GB GB1050711D patent/GB1050711A/en not_active Expired
-
1963
- 1963-10-04 US US313803A patent/US3303045A/en not_active Expired - Lifetime
-
1964
- 1964-07-17 CH CH942764A patent/CH443363A/de unknown
- 1964-09-23 DE DE19641436635 patent/DE1436635A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1427330A (en) * | 1922-05-08 | 1922-08-29 | Rousset Jules | Manufacture of hollow artificial textile articles |
US2167990A (en) * | 1936-02-28 | 1939-08-01 | Underwood Elliott Fisher Co | Typewriter ribbon |
US3117018A (en) * | 1958-11-03 | 1964-01-07 | Strauss Eugen | Color transfer medium and method of producing the same |
US3022880A (en) * | 1959-11-16 | 1962-02-27 | Columbia Ribbon & Carbon | Novel transfer media |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3516896A (en) * | 1966-05-31 | 1970-06-23 | Jean Leon Laurent | Fabric with elastic warp,treated for the purpose of improving speed |
US3542909A (en) * | 1966-08-02 | 1970-11-24 | Shell Oil Co | Production of fibrous filamentous products |
US3520766A (en) * | 1967-02-14 | 1970-07-14 | Columbia Ribbon Carbon Mfg | Ink and dye receptive fabric and process for making the same |
US3620802A (en) * | 1969-12-08 | 1971-11-16 | Columbia Ribbon Carbon Mfg | Duplicating ribbons and process |
US3957936A (en) * | 1971-07-22 | 1976-05-18 | Raduner & Co., Ag | High temperature process for modifying thermoplastic filamentous material |
US4054550A (en) * | 1974-04-11 | 1977-10-18 | Monsanto Limited | Process for producing cigarette filters |
US4201813A (en) * | 1976-01-14 | 1980-05-06 | Brumlik George C | Cellular linear filaments with transverse partitions |
US4307152A (en) * | 1977-12-12 | 1981-12-22 | Akzona Incorporated | Hydrophilic polyester fiber and process for making same |
US4371485A (en) * | 1977-12-12 | 1983-02-01 | Akzona Incorporated | Process for making hydrophilic polyester fiber |
US4522955A (en) * | 1981-05-29 | 1985-06-11 | Sumitomo Chemical Company, Limited | Highly foamed polypropylene product and an extrusion process for forming the product |
DE3409788A1 (de) * | 1983-08-01 | 1985-02-21 | Albany International Corp., Menands, N.Y. | Papiermaschinenbespannung |
US4858629A (en) * | 1986-05-09 | 1989-08-22 | S.P.T. S.R.L. | Increased volume synthetic fibres, procedure for producing them and their use, in particular for filters |
Also Published As
Publication number | Publication date |
---|---|
DE1436635A1 (de) | 1969-01-30 |
CH443363A (de) | 1967-09-15 |
GB1050711A (sv) | 1900-01-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION (IBM C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GREENE, IRA S., TRUSTEE OF COLUMBIA RIBBON AND CARBON MANUFACTURING CO. INC.;REEL/FRAME:003933/0208 Effective date: 19811102 |
|
AS | Assignment |
Owner name: GREENE, IRA S 275 MADISON AVE.NEW YORK,N.Y.10016 Free format text: COURT APPOINTMENT;ASSIGNOR:COLUMBIA RIBBON AND CARBON MANUFACTURING CO INC;REEL/FRAME:004035/0217 Effective date: 19820629 |