US2715363A - Printing on polyethylene - Google Patents
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- US2715363A US2715363A US209075A US20907551A US2715363A US 2715363 A US2715363 A US 2715363A US 209075 A US209075 A US 209075A US 20907551 A US20907551 A US 20907551A US 2715363 A US2715363 A US 2715363A
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- polyethylene
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- printing
- heat
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- 239000004698 Polyethylene Substances 0.000 title claims description 42
- -1 polyethylene Polymers 0.000 title claims description 42
- 229920000573 polyethylene Polymers 0.000 title claims description 42
- 238000007639 printing Methods 0.000 title claims description 33
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 229920003023 plastic Polymers 0.000 description 49
- 239000004033 plastic Substances 0.000 description 49
- 239000000203 mixture Substances 0.000 description 22
- 230000005855 radiation Effects 0.000 description 17
- 230000010354 integration Effects 0.000 description 9
- 239000002985 plastic film Substances 0.000 description 6
- 229920006255 plastic film Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009969 flowable effect Effects 0.000 description 4
- 239000012260 resinous material Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
Definitions
- This invention relates to a' process for printing on surfaces of: plastic material such, for example, as plastic films, sheet stock or molded products, and it relates particularly to printing on such plastic surfaces as are based upon polyethylene or other resinous materials of like character.
- Polyethylene and other resinous materials of like character are unlike most of the other resinous materials when considering the problem of printing because the surfaces of poiyethylene are so smooth as to militate against ordinary physical anchorage of the ink composition and solvent systems, which are sometimes employed to soften or etch the surface of the plastic to enable integration of the ink composition, have little, if any, effect because polyethylene is relatively inert to known solvent systems. content with inadequate integrationof printing or coating on polyethylene.
- such printed or coated surfaces have been temporary in nature because they can be easily rubbed, scratched or lifted off.
- a test which is often employed with printing materials of the type described makes use of an adhesive tape, such as Scotch Tape, for testing the adherence of the printing ink to the surface. In the past, the Scotch Tape test has been effective to remove substantially all printing applied to surfaces of polyethylene.
- a further object is to provide a simple and expedient method for printing on polyethylene surfaces and it is a related object to provide a printing method which may be adapted for continuous and high'speed operation.
- a further object is to provide a printing process of the type described which is not deleterious or harmful to the characteristics and strength of the material upon which printing is carried out.
- Figure 2 is aschernatic view illustrating the technique for printing, plastics with the arrangement shown in Figure 1;
- Figure 3 is a schematic view in section showing the printed plastic
- Figure 4 is. a plan view showingcontinuous operation embodying features of. this invention for printing plastic film.
- Figure 5 illustrates the concept employed in printing on molded plastic surfaces, such as a blown plastic bottle.
- Ink composition in sufficient quantity may be directly applied to the plastic surface by ordinary printing processes, such as by silk screen printing, printing roll, offset printing or the like, and then the plastic surfacealong with the printing ink thereon may be radiated at some The radiations are reflected or otherwise dissipated by the uninked areas and those radiations absorbed by the material in the ink composition are converted into heat. The heat thus developed reacts to soften the plastic surface contacted by the ink to permit the desired degree of integration. This is to be distinguished from the drying or setting of ink compositions onto surfaces such as plastic surfaces by exposure to elevated temperature.
- the ink composition has been previously dried or set on the polyethylene, in the practice of applicants invention, it will still require the further steps described and claimed herein to effect integration of the polyethylene and the printing ink composition applied thereon.
- radiation of the plastic surface follows almost immediately after application, some of the generated heat may be employed for drying or setting the ink but much more will be needed to carry the reaction an additional distance to effect proper integration of the ink with theplastic surface.
- the phenomenon of heat generation by radiation absorption in ink materials in accordance with this invention may be practiced with radiations rich in infrared. These include rays having a wavelength ranging from 8,000 to 40,000 angstroms. Radiant energy capable of the phenomenon of the type describedmay be developed most effectively in sufiiciently high concentration by an ordinary flash bulb or by a tungsten filament lamp, carson are lamp, photographers flash lamp and the like.
- the amount of heat developed upon absorption of radiant energy in the materials of the ink composition depends chiefly upon the duration of exposure coupled with the intensity of the usable radiant energy from the light beams.
- the amount of heat developed also depends upon the color in the ink composition and the character of the materials of which it is formed. Satisfactory use, for example, is made with ink compositions formulated of carbon black and the like.
- printing as described herein relies on integration of the ink composition with the heat softened plastic surface, as distin uished from-prior systems wherein integration is accomplished by way of solvent attack.
- the printed plastic produced in accordance with this invention may be handled almost immediately after printing and, therefore, the process is amenable to high-speed continuous operation. In prior systems, it was necessary to force the evaporation of solvent or to await the natural evaporation thereof before'the plastic material could be handled, otherwise the ink composition would smear and offset.
- colors other than black may be printed onto plastic surfaces in the manner described so long asingredients therein are capable of absorbing radiant energy and converting it into heat.
- selected dyes and catalysts may be incorporated into the ink composition for the purpose of increasing the absorption of radiant energy and accelerating the conversion of the absorbed radiant energy into heat.
- Organic or inorganic converters capable of changing unused light rays into heat-generating rays for the purpose of developing higher temperature in shorter time may also be incorporated.
- ink composition is printed or otherwise arranged on a polyethylene film 11.
- Radiations 12 from a tungsten arc lamp 13 are directed upon the printed plastic surface, as shown in Figure 2, so that the radiations are substantially completely reflected by the uninked portions of the plastic while other radiations are absorbed by the material in the inked portion and converted into heat.
- the heat causes softening of the plastic surface upon which the ink is disposed and it may also cause the reduction of the ink composition to flowable condition so that the ink may flow into the softened plastic surface and become integrated therewith.
- the ink 15 becomes imbedded in the plastic film to impart legibility.
- the ink so deposited is capable of resisting all presently known tests for its physical removal.
- a film of plastic material may be fed continuously between cooperating rolls 31 and 32, one of which is an inking roll that applies ink 33 ontothe surface of the plastic, as by an offset process.
- the plastic film with the ink thereon is then advanced over another roll 34 during which the ink surface is radiated from a light source 35 rich in infra-red, the radiations being absorbed by material in the ink composition and converted into heat.
- the ink becomes thoroughly imbeclded and integrated into the surface of the plastic material and becomes a permanent part thereof.
- the roll 34 may be cooled by water, air, or othermeans so as to maintain the inner surface of the plastic in non-flowable condition. Integration of the ink image with the plastic may be improved by the use of a pressure roller cooperating with the roller 34 to engage the printed side of the plastic sheet upon radiation.
- the temperature developed upon radiation is relatively unimportant except for the fact that it should be sufiicient to soften the surface of the plastic at the point of contact with the ink so that the ink can be imbedded herein. It has been found that temperatures in the range of 200 to 550 F. in the inked areas may be developed upon exposure of fractions of a second up to two or three seconds by the techniques described and especially by the use of a photo-flash lamp. Such temperatures are sufficient to achieve the desired results with most plastics. In the event that greater temperature is desired, the exposure of the web to radiant energy may be extended or the intensity of the light beam may correspondingly be increased.
- ink 40 may be applied to a surface of a plastic bottle 41 blown from polyethylene or other like plastic materials, and then the plastic surface radiated by flashing of a photographers flash lamp whereby radiations rich in infra-red are generated.
- the radiations are reflected by the uncoated'surfaces of th plastic material and absorbed by the ink and converted into heat.
- the heat causes softening of the plastic surface on which the ink is disposed so that the ink may flow and secure anchorage into the wall of the bottle.
- cooling medium such as water may be poured into the bottle to maintain the major portion of, the plastic surface at a temperature below flowable condition.
- Printing in this manner on blown plastic containers is an important advance because the heat generated is local in nature and afiiects only a small portion of the container such that the system will not set up conditions causing collapse of the bottle or the like.
- Other thermal systems could not be employed because the highly oriented plastic would be reduced to flowable condition to the extent that plastic deformation would take place and the product would be unsuitable for the purpose intended.
Description
g- 1955 K. s. HOOVER 2,715,363
PRINTING ON POLYETHYLENE Filed Feb. 2, 1951 7 K V A f2 ,2 WM 1% IN VEN TOR.
ATTORNEYS.
United States Patent PRINTING ON POLYETHYLENE Keith S. Hoover, Elmhurst, 111., assignor to A. B. Dick Company, Niles, 111., a corporation of Illinois Application'February 2, 1951, Serial No. 209,075
4 Claims. (Cl. 101'--426) This invention relates to a' process for printing on surfaces of: plastic material such, for example, as plastic films, sheet stock or molded products, and it relates particularly to printing on such plastic surfaces as are based upon polyethylene or other resinous materials of like character.
Polyethylene and other resinous materials of like character are unlike most of the other resinous materials when considering the problem of printing because the surfaces of poiyethylene are so smooth as to militate against ordinary physical anchorage of the ink composition and solvent systems, which are sometimes employed to soften or etch the surface of the plastic to enable integration of the ink composition, have little, if any, effect because polyethylene is relatively inert to known solvent systems. content with inadequate integrationof printing or coating on polyethylene. In the past, such printed or coated surfaces have been temporary in nature because they can be easily rubbed, scratched or lifted off. A test which is often employed with printing materials of the type described makes use of an adhesive tape, such as Scotch Tape, for testing the adherence of the printing ink to the surface. In the past, the Scotch Tape test has been effective to remove substantially all printing applied to surfaces of polyethylene.
It is an object of this invention to provide a method for permanently printing plastic surfaces based upon polyethylene or other resinous materials of like character.
A further object is to provide a simple and expedient method for printing on polyethylene surfaces and it is a related object to provide a printing method which may be adapted for continuous and high'speed operation.
A further object is to provide a printing process of the type described which is not deleterious or harmful to the characteristics and strength of the material upon which printing is carried out.
These and other objects and advantages of this invention willhereinafter appear and for purposes of illustration, but not of limitation, embodiments of the invention are shown. in the accompanying drawing in WhiCh Figure l is a schematic sectional elevational View of an arrangement of elements in accordance with the practice of this invention;
Figure 2'is aschernatic view illustrating the technique for printing, plastics with the arrangement shown in Figure 1;
Figure 3 is a schematic view in section showing the printed plastic;
Figure 4 is. a plan view showingcontinuous operation embodying features of. this invention for printing plastic film; and
Figure 5 illustrates the concept employed in printing on molded plastic surfaces, such as a blown plastic bottle.
Inaccordance with this invention, a coating or printing ink composition in the desired arrangement is printed As'a result, the industry has had to be subsequent time.
2,715,363 Patented Aug. 16,. 1955 ice or applied directly onto the surface of the polyethylene plastic to be printed and then radiant energy is directed onto the inked plastic whereby radiations are absorbed by the material in the printing, ink and converted into heat. The heat generated in the ink composition is sufficient to modify the surface of the polyethylene plastic material so that the ink may become imbedded and/or integrated into the plastic surface and become a permanent part thereof.
Ink composition in sufficient quantity may be directly applied to the plastic surface by ordinary printing processes, such as by silk screen printing, printing roll, offset printing or the like, and then the plastic surfacealong with the printing ink thereon may be radiated at some The radiations are reflected or otherwise dissipated by the uninked areas and those radiations absorbed by the material in the ink composition are converted into heat. The heat thus developed reacts to soften the plastic surface contacted by the ink to permit the desired degree of integration. This is to be distinguished from the drying or setting of ink compositions onto surfaces such as plastic surfaces by exposure to elevated temperature. In the event that the ink composition has been previously dried or set on the polyethylene, in the practice of applicants invention, it will still require the further steps described and claimed herein to effect integration of the polyethylene and the printing ink composition applied thereon. When radiation of the plastic surface follows almost immediately after application, some of the generated heat may be employed for drying or setting the ink but much more will be needed to carry the reaction an additional distance to effect proper integration of the ink with theplastic surface.
The phenomenon of heat generation by radiation absorption in ink materials in accordance with this invention may be practiced with radiations rich in infrared. These include rays having a wavelength ranging from 8,000 to 40,000 angstroms. Radiant energy capable of the phenomenon of the type describedmay be developed most effectively in sufiiciently high concentration by an ordinary flash bulb or by a tungsten filament lamp, carson are lamp, photographers flash lamp and the like. The amount of heat developed upon absorption of radiant energy in the materials of the ink composition depends chiefly upon the duration of exposure coupled with the intensity of the usable radiant energy from the light beams. The amount of heat developed also depends upon the color in the ink composition and the character of the materials of which it is formed. Satisfactory use, for example, is made with ink compositions formulated of carbon black and the like.
As previously pointed out, printing as described herein relies on integration of the ink composition with the heat softened plastic surface, as distin uished from-prior systems wherein integration is accomplished by way of solvent attack. The printed plastic produced in accordance with this invention may be handled almost immediately after printing and, therefore, the process is amenable to high-speed continuous operation. In prior systems, it was necessary to force the evaporation of solvent or to await the natural evaporation thereof before'the plastic material could be handled, otherwise the ink composition would smear and offset.
In accordance with the practice of this invention, only that portion of the plastic surface which is inked becomes heated up While the remainder, which usually covers a major portion of the surface, is relatively unaf fected. This is to be compared to prior thermal systems for drying or setting the ink wherein the entire surface of the plastic is necessarily exposed to elevated temperature. Such overall heating of the plastic surface is undesirable because, under such conditions, the, plastic may become capable of flow and molecular rearrangement. If it is under molecular tension, shrinkage occurs and wrinkling and buckling are usually experienced. On the other hand, when only the inked portion of the surface is' heated up to integrate the ink composition; as in the practice of this invention, the remainder of the surface, which isunafiected,substantially maintains its original character; Blemisheswhich might occur in the inked portions which are heated up are substantially concealed by the imbedded ink composition. It is for this reason, also, that it is preferred to employ means for developing suflicient heat substantially instantaneously so as to minimize' the possibility of migration of heat to adjacent areas of the plastic material or generation of heat in areas other than that covered by the printing ink composition. This permits the production of copy having better definition. It will be apparent that colors other than black may be printed onto plastic surfaces in the manner described so long asingredients therein are capable of absorbing radiant energy and converting it into heat. By way of further improvement, selected dyes and catalysts may be incorporated into the ink composition for the purpose of increasing the absorption of radiant energy and accelerating the conversion of the absorbed radiant energy into heat. Organic or inorganic converters capable of changing unused light rays into heat-generating rays for the purpose of developing higher temperature in shorter time may also be incorporated. As shown in Figure 1, ink composition is printed or otherwise arranged on a polyethylene film 11. Radiations 12 from a tungsten arc lamp 13 are directed upon the printed plastic surface, as shown in Figure 2, so that the radiations are substantially completely reflected by the uninked portions of the plastic while other radiations are absorbed by the material in the inked portion and converted into heat. The heat causes softening of the plastic surface upon which the ink is disposed and it may also cause the reduction of the ink composition to flowable condition so that the ink may flow into the softened plastic surface and become integrated therewith. Asschematically illustrated in Figure 3, the ink 15 becomes imbedded in the plastic film to impart legibility. The ink so deposited is capable of resisting all presently known tests for its physical removal.
As shown in Figure 4, a film of plastic material may be fed continuously between cooperating rolls 31 and 32, one of which is an inking roll that applies ink 33 ontothe surface of the plastic, as by an offset process. The plastic film with the ink thereon is then advanced over another roll 34 during which the ink surface is radiated from a light source 35 rich in infra-red, the radiations being absorbed by material in the ink composition and converted into heat. By this technique, the ink becomes thoroughly imbeclded and integrated into the surface of the plastic material and becomes a permanent part thereof. As a precaution against deleterious effects of the heat generated, the roll 34 may be cooled by water, air, or othermeans so as to maintain the inner surface of the plastic in non-flowable condition. Integration of the ink image with the plastic may be improved by the use of a pressure roller cooperating with the roller 34 to engage the printed side of the plastic sheet upon radiation. I
Since only a very small portion of the plastic film becomes heated, the temperature developed upon radiation is relatively unimportant except for the fact that it should be sufiicient to soften the surface of the plastic at the point of contact with the ink so that the ink can be imbedded herein. It has been found that temperatures in the range of 200 to 550 F. in the inked areas may be developed upon exposure of fractions of a second up to two or three seconds by the techniques described and especially by the use of a photo-flash lamp. Such temperatures are sufficient to achieve the desired results with most plastics. In the event that greater temperature is desired, the exposure of the web to radiant energy may be extended or the intensity of the light beam may correspondingly be increased.
As shown in Figure 5, ink 40 may be applied to a surface of a plastic bottle 41 blown from polyethylene or other like plastic materials, and then the plastic surface radiated by flashing of a photographers flash lamp whereby radiations rich in infra-red are generated. The radiations are reflected by the uncoated'surfaces of th plastic material and absorbed by the ink and converted into heat. The heat causes softening of the plastic surface on which the ink is disposed so that the ink may flow and secure anchorage into the wall of the bottle. In the event that the oriented nature of the plastic of which the bottle is formed tends to cause buckling of the plastic bottle responsive to the heat absorbed, cooling medium such as water may be poured into the bottle to maintain the major portion of, the plastic surface at a temperature below flowable condition. Printing in this manner on blown plastic containers is an important advance because the heat generated is local in nature and afiiects only a small portion of the container such that the system will not set up conditions causing collapse of the bottle or the like. Other thermal systems could not be employed because the highly oriented plastic would be reduced to flowable condition to the extent that plastic deformation would take place and the product would be unsuitable for the purpose intended.
It will be apparent from the description that a new and novel means has been provided for printing on polyethylene and the like. The technique described is capable of continuous operation at high speed and involves little by way of additional equipment, so that it can be employed at distant stations and in small operations by all who desire to print on plastic surfaces. The application of pressure at point of transfer or soon thereafter will aid the integration of the ink composition with the plastic.
It will be understood that numerous changes may be made in the details of the construction, arrangement, and operation without departing from the spirit of the invention, especially as defined in the following claims.
I claim:
1. In the method of printing on polyethylene, the steps of applying ink containing infra-red ray absorbing, heat. generating material in the desired image on the surface of polyethylene which is relatively noninfra-red ray absorbing, and directing radiations having high intensity of infra-red onto the ink imaged polyethylene in amount sufiicient rapidly to build up'a heat pattern in the inked areas which softens the underlying portion of the polyethylene to achieve anchorage of the ink image thereto while the non-imaged portions of the polyethylene remain substantially unaffected.
2. In the method of printing on polyethylene, the steps of applying ink containing infra-red ray absorbing, heat generating material in the desired image on the surface of polyethylene which'is relatively non-infrared ray absorbing, directing radiationshaving high intensity of infra-red onto the ink imaged polyethylene in amounts sutficient rapidly to build up a heat pattern in the inked areas which softens the underlying portion of the polyethylene to achieve anchorage of the ink image thereto while the non-imaged portions of the polyethylene remain substantially unaffected, and applying pressure to the inked surface of the polyethylene upon radiation to effect integration of the imaged ink portion with the underlying softened polyethylene material.
3. Inthe method of printing on polyethylene, the steps of applying ink containing infra-red absorbing, heat generating material in the desired image on the surface of polyethylene which is, relatively non-infra-red ray absorbing, directing radiations having high intensity of infra-red onto the ink-ima'gedpolyethylene in amounts suflicient-rapidlytobuild up aheatpattern in the inked a eas which softens the underlying portion of the poly ethylene to achieve anchorage of the ink image thereto while the non-imaged portions of the polyethylene remain substantially unaffected, and cooling the opposite side of the polyethylene to limit the amount of heat penetration into the polyethylene material.
4. A printed polyethylene in which the polyethylene is printed by the method of claim 1.
2,236,754 Gurwick Apr. 1, 1941 6 Hess Jan. 6, 1942 Boutwell Aug. 15, 1944 Prance Oct. 29, 1946 Chavannes Oct. 25, 1949 Bardash Dec. 20, 1949 Murray Apr. 11, 1950 Murray Apr. 11, 1950 Murray May 8, 1951 Kreidl Mar. 31, 1953 FOREIGN PATENTS Great Britain May 10, 1949
Claims (1)
1. IN THE METHOD OF PRINTING ON POLYETHYLENE, THE STEPS OF APPLYING INK CONTAINING INFRA-RED RAY ABSORBING, HEAT GENERATING MATERIAL IN THE DESIRED IMAGE ON THE SURFACE OF POLYETHYLENE WHICH IS RELATIVELY NONINFRA-RED RAY ABSORBING, AND DIRECTING RADIATIONS HAVING HIGH INTENSITY OF INFRA-RED ONTO THE INK IMAGED POLYETHYLENE IN AMOUNT SUFFICIENT RAPIDLY TO BUILD UP A HEAT PATTERN IN THE INKED AREAS WHICH SOFTENS THE UNDERLYING PORTION OF THE POLYETHYLENE TO ACHIEVE ANCHORAGE OF THE INK IMAGE THERETO WHILE THE NON-IMAGED PORTIONS OF THE POLYETHYLENE REMAIN SUBSTANTIALLY UNAFFECTED.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US209075A US2715363A (en) | 1951-02-02 | 1951-02-02 | Printing on polyethylene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US209075A US2715363A (en) | 1951-02-02 | 1951-02-02 | Printing on polyethylene |
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US2715363A true US2715363A (en) | 1955-08-16 |
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US209075A Expired - Lifetime US2715363A (en) | 1951-02-02 | 1951-02-02 | Printing on polyethylene |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2811106A (en) * | 1955-06-13 | 1957-10-29 | American Cyanamid Co | Method of printing polyethylene for bulk packaging |
DE1054467B (en) * | 1956-02-22 | 1959-04-09 | Glaswerke Ruhr Ag | Screen printing device for thermoplastic colors |
US2920009A (en) * | 1955-03-23 | 1960-01-05 | Minnesota Mining & Mfg | Decalcomania and method of using same |
US2936261A (en) * | 1955-05-18 | 1960-05-10 | Gen Electric | Sealing irradiated polyethylene |
US2954311A (en) * | 1957-09-25 | 1960-09-27 | Weel Walter H Vander | Method for copying indicia by particle transfer |
US2997418A (en) * | 1956-10-18 | 1961-08-22 | Gen Electric | Cold welding of organopolysiloxanes |
US2997419A (en) * | 1956-10-18 | 1961-08-22 | Gen Electric | Cold welding of polyester resins |
US3054175A (en) * | 1957-01-18 | 1962-09-18 | Fluckizer & Cie | Process for the manufacture of dials having recessed markings or markings formed in relief |
US3075868A (en) * | 1957-09-09 | 1963-01-29 | Continental Can Co | Method of bonding polymer plastics to substrate webs of dissimilar materials |
US3153106A (en) * | 1961-10-11 | 1964-10-13 | Glanzstoff Ag | Production of novel effect fabrics and filaments and yarns therefor |
US3233019A (en) * | 1962-08-07 | 1966-02-01 | Du Pont | Process of multiple neck drawing while simultaneously infusing modifying agent |
US3237973A (en) * | 1962-10-10 | 1966-03-01 | Pateco | Magnetically orientable wrapping materials and method of making and using same |
US3273498A (en) * | 1964-03-23 | 1966-09-20 | Continental Can Co | Forming colored patterns upon polyolefin surfaces |
US3647506A (en) * | 1967-07-14 | 1972-03-07 | Forschungsgemeinschaft Fur Tec | Method of and apparatus for burning graduations symbols and lettering into glass articles |
US4286957A (en) * | 1979-01-10 | 1981-09-01 | Essilor International "Cie Generale D'optique" | Process of integrating a photochromic substance into an ophthalmic lens and a photochromic lens of organic material |
US4419304A (en) * | 1980-07-15 | 1983-12-06 | Western Electric Company, Inc. | Method for forming seals with heat shrinkable materials |
US4511520A (en) * | 1982-07-28 | 1985-04-16 | American Can Company | Method of making perforated films |
US4668239A (en) * | 1982-05-12 | 1987-05-26 | K-T, Inc. | Method of applying a dye image to a plastic member |
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US2355949A (en) * | 1941-08-29 | 1944-08-15 | Clarence E Boutwell | Method of making composite printing plates |
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US2486259A (en) * | 1947-09-06 | 1949-10-25 | Marc A Chavannes | Method for printing on thermoplastic sheetlike material |
US2491947A (en) * | 1948-06-11 | 1949-12-20 | Modern Art Printing Company | Apparatus and method of printing |
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US2552209A (en) * | 1947-09-17 | 1951-05-08 | Eastman Kodak Co | Fusion photothermography |
US2632921A (en) * | 1949-01-18 | 1953-03-31 | Werner H Kreidl | Method for improving the bonding properties of polyethylene plastics |
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- 1951-02-02 US US209075A patent/US2715363A/en not_active Expired - Lifetime
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US2268985A (en) * | 1937-12-29 | 1942-01-06 | Interchem Corp | Method and apparatus for drying printing ink |
US2236754A (en) * | 1939-06-24 | 1941-04-01 | Shellmar Products Co | Printing transparent material |
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US2503758A (en) * | 1947-08-16 | 1950-04-11 | Eastman Kodak Co | Fusion photothermography |
US2503759A (en) * | 1947-08-16 | 1950-04-11 | Eastman Kodak Co | Evaporography |
US2486259A (en) * | 1947-09-06 | 1949-10-25 | Marc A Chavannes | Method for printing on thermoplastic sheetlike material |
US2552209A (en) * | 1947-09-17 | 1951-05-08 | Eastman Kodak Co | Fusion photothermography |
US2491947A (en) * | 1948-06-11 | 1949-12-20 | Modern Art Printing Company | Apparatus and method of printing |
US2632921A (en) * | 1949-01-18 | 1953-03-31 | Werner H Kreidl | Method for improving the bonding properties of polyethylene plastics |
Cited By (18)
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---|---|---|---|---|
US2920009A (en) * | 1955-03-23 | 1960-01-05 | Minnesota Mining & Mfg | Decalcomania and method of using same |
US2936261A (en) * | 1955-05-18 | 1960-05-10 | Gen Electric | Sealing irradiated polyethylene |
US2811106A (en) * | 1955-06-13 | 1957-10-29 | American Cyanamid Co | Method of printing polyethylene for bulk packaging |
DE1054467B (en) * | 1956-02-22 | 1959-04-09 | Glaswerke Ruhr Ag | Screen printing device for thermoplastic colors |
US2997418A (en) * | 1956-10-18 | 1961-08-22 | Gen Electric | Cold welding of organopolysiloxanes |
US2997419A (en) * | 1956-10-18 | 1961-08-22 | Gen Electric | Cold welding of polyester resins |
US3054175A (en) * | 1957-01-18 | 1962-09-18 | Fluckizer & Cie | Process for the manufacture of dials having recessed markings or markings formed in relief |
US3075868A (en) * | 1957-09-09 | 1963-01-29 | Continental Can Co | Method of bonding polymer plastics to substrate webs of dissimilar materials |
US2954311A (en) * | 1957-09-25 | 1960-09-27 | Weel Walter H Vander | Method for copying indicia by particle transfer |
US3153106A (en) * | 1961-10-11 | 1964-10-13 | Glanzstoff Ag | Production of novel effect fabrics and filaments and yarns therefor |
US3233019A (en) * | 1962-08-07 | 1966-02-01 | Du Pont | Process of multiple neck drawing while simultaneously infusing modifying agent |
US3237973A (en) * | 1962-10-10 | 1966-03-01 | Pateco | Magnetically orientable wrapping materials and method of making and using same |
US3273498A (en) * | 1964-03-23 | 1966-09-20 | Continental Can Co | Forming colored patterns upon polyolefin surfaces |
US3647506A (en) * | 1967-07-14 | 1972-03-07 | Forschungsgemeinschaft Fur Tec | Method of and apparatus for burning graduations symbols and lettering into glass articles |
US4286957A (en) * | 1979-01-10 | 1981-09-01 | Essilor International "Cie Generale D'optique" | Process of integrating a photochromic substance into an ophthalmic lens and a photochromic lens of organic material |
US4419304A (en) * | 1980-07-15 | 1983-12-06 | Western Electric Company, Inc. | Method for forming seals with heat shrinkable materials |
US4668239A (en) * | 1982-05-12 | 1987-05-26 | K-T, Inc. | Method of applying a dye image to a plastic member |
US4511520A (en) * | 1982-07-28 | 1985-04-16 | American Can Company | Method of making perforated films |
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