|Publication number||US3732061 A|
|Publication date||May 8, 1973|
|Filing date||Jun 3, 1971|
|Priority date||Jun 3, 1971|
|Publication number||US 3732061 A, US 3732061A, US-A-3732061, US3732061 A, US3732061A|
|Original Assignee||Champion Int Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (3), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
UIlitd States Patent 1 91 Hackley 1 1 May 8, 1973 54] REINFORCED PAGE AND METHOD OF 3,637,983 1/1972 PRINTING ON SAME 2,059,148 10/1936 2,375,582 5/1945 Inventor: Kenneth Lewis y, Oxford, 2,422,935 6/1947 Straubel et a1. ..402 79 Ohio . Primary ExaminerJohn J. Camby  Assigneez Champion International Corp0ra- Knightsbridge Ohio Attorney-Daniel P. Worth  Filed: June 3, 1971  ABSTRACT [211 App]. No.: 149,431 A reinforced page suitable for insertion in a notebook or the like has along one edge a plastic with a metal or metallized surface for reinforcement. Holes extend  US. Cl ..432/10, 432/226 through the metal and plastia Tha method of Printing 51 Int. (:1 ..F27b 9 14 with such a page involves passing the page through a  Fleld of Search "263/6 E, 52, 50; Printing or copying device Where it is exposed to heat 402/79 such as a xerographic dry copier, with the metal surface facing toward the heat source.  References Cited 5 Claims, 2 Drawing Figures UNITED STATES PATENTS 3,591,400 7/1971 Palmquist et a1. ..263/50 REINFORCED PAGE AND METHOD OF PRINTING ON SAME SUMMARY OF INVENTION This invention relates to improvements in reinforced pages. One aspect of the invention relates to improvements in reinforced pages for insertion in a looseleaf notebook and the like having on one side plastic with a metal surface and a hole or other opening therein. The method of printing involves passing the page with the metal-surfaced plastic facing toward a source of heat of the sort which may be found in a xerographic dry copier or the like.
BACKGROUND OF INVENTION It is known to make reinforced pages of the sort to be bound into looseleaf notebooks. These pages have reinforcements along the edges where holes are punched for connection to a ring or post binder. The reinforcing strip has been paper, plastic or the like secured by a pressure sensitive or hot melt adhesive to the main page member.
It has been discovered that the reinforcing strip separates during transport of the page through a printing machine of the xerographic dry printing type (e.g., as made by the Xerox Corporation) where the page is subjected to extreme heat during certain phases of printing. The adhesives, being thermoplastic in character or otherwise softenable by heat, permit this. Where the reinforcing strip is plastic the problem is made worse by softening or partial melting of the strip itself and consequent adhesion or sticking to parts of the printing apparatus.
These problems arise because the temperatures to which the page may be exposed might run as high as 600 700 F the plastic film (often polyester) has a softening point in the range from 175 300 F and the adhesive conventionally used to secure film or reinforcing paper to the page panel member has a melting temperature of about 350 F. and may soften at a much lower temperature. The reinforcing strip may delaminate when the adhesive softens. The softening arises from a combination of the temperature and the length of time the page is exposed to that temperature in the printing process.
The present invention has for an objective providing a reinforced page member whereby it may be passed through a xerographic dry printing machine without the reinforcement coming loose due to the heat. Another objective of the present invention is to provide improved reinforcing means to a page of the kind here involved that will not require any substantial changes in the machinery for manufacturing reinforced pages.
A page or divider of the sort normally used for a notebook or post binder insert has a reinforcement along one edge comprising a plastic strip coated or surfaced with metal through which holes are punched. For convenience I may term this metallized plastic. The holes of course are for attachment to the looseleaf binder or the like. The metallized strip acts to reflect the heat while the page is passing through a xerographic dry printing machine, e.g., of the sort made by the Xerox Corporation. The reflection of heat by the strip reflects heat during the time that the page is transported through the xerographic printer. The strip, of course, is positioned so that the metallized surface faces toward the source of heat during printing in order to assure the use of its reflective power.
The method of printing with the present invention involves passing a page having an edge reinforcement of metallized plastic and with holes through such reinforcement through a printing machine, preferably a xerographic printer, having a source of high heat therein, the metal surface of the reinforcement being positioned to reflect heat from said source.
The invention will be better appreciated from the following specification when read in conjunction with the annexed drawing and claims wherein:
FIG. 1 schematically illustrates a xerographic dry printer with a page going therethrough to receive printing thereon;
FIG. 2 is an enlarged perspective partially cutaway schematic view of an edge reinforced page made according to the present invention.
Referring first to FIG. 1 there is shown a page 1 passing through a xerographic dry printer. When the page passes a printing station, images 2 are applied thereto by a drum 3 which has a toner or dry printing powder 4 held in patterns thereon by electric charges, the patterns and images having been formed in a wellknown manner using the images 2 written on a master sheet 5, photoconductive surfaces on the drum 3 of material or materials which are electrically charged or discharged by light from a source 6 (e.g., a light bulb) directed to said drum surface, the toners of powders 4 highly responsive to the electric charges remaining on charged parts of the drum surface until printed on the paper 1, and an infrared or similar heat source 7 to melt the resin contained in the dry printing powder or toner. The melting of the resin causes the printing powder which is black to adhere to the sheet and form a relatively permanent and stable image 2. All of this is wellknown in the art and the several means for practicing same are known in the art. They form no part of the invention but instead form some of the means creating problems here. The present invention as already noted is directed at obviating some of these problems such as those wherein the edge reinforcement of the page comes loose or is warmed up to the point that it sticks to some of the printing apparatus.
It has been found that the use of a metallized plastic strip 11 (FIG. 2) is effective to reflect sufficient heat from the infrared or other heating source so that the adhesive and the tape surface do not become softened to the point where the reinforcement is lost or there is adhesion and sticking to the parts of the printing machine. As best seen in FIG. 2, the present invention involves a sheet of paper 12 of whatever dimensions are appropriate for fitting a notebook, post binder or like assemblage. having a reinforcement secured to one edge by an adhesive 14. The adhesive is a thermoplastic adhesive, preferably can be conventional hot melt adhesive but other adhesives can be used, e.g., a heat curable (thermosetting) adhesive, or a catalytically cured adhesive. The strip itself is preferably polyester film (preferably Mylar).
On the outer face of the polyester film is a coating or layer of metal 15. This preferably is a commercially available type of vacuum deposited aluminum, but other reflective materials can be used, e.g., copper, silver, gold. Electrolessly plated metals are also feasible but expense may make them less desirable:
nickel and copper are the most desirable of this catego ry. It is a characteristic of these metallized films that the metal does not reduce film flexibility but provides sufi'icient reflectivity to shield film and adhesive against any significant softening during printing.
A suitable metallized polyester film is Scotchpar XM 130092 comprising 1 mil (0.001 inch) polyester film metallized on one side and made by Minnesota Mining and Manufacturing Company. A suitable hot melt adhesive is glue No. 6018 made by the Manufacturing Chemical Company of Camden, New Jersey. These used in combination with a conventional paper page basis weight 20 pounds per 17 inch X 22 inch ream of 500 sheets (51 pounds per 500 sheet ream 25 X 38 inches) can be fed through a Model 2400 or 3600-l Xerox machine made by the Xerox Corporation at rates of 2400 and 3600 copies per hour, respectively, without being softened. This feed rate provides one of the longest exposure times to infrared or heat source in commercial equipment of this type.
Although metallized plastic is preferred, on some occasions a thin metal foil may be adhered to the paper as reinforcement. Generally the plastic film is stronger, doesnt tear as easily, is less likely to cut a user, and handles better during manufacture.
The edge reinforcement also has a hole or holes 16 punched therethrough for securing the page to the ring binder or post binder of the book into which the reinforced page is inserted.
EXAMPLE I A sheet which had a strip of 9/16 inch wide No. XMl30092 (see above) metallized plastic (polyester) film tape and a strip of unmetallized plastic of the same material was fed through a Model 2400 Xerox which runs temperatures on the order of 340 375. No. 6018 (see above) hot melt glue was employed, being held at a pot or application temperature of about 350 F. for manufacturing purposes. The unmetallized tape was melted loose, curled up and stopped the machine.
The strip of metallized was unaffected. The sheet was retrieved from the heat fusing section of the machine after the stoppage.
EXAMPLE n A number of metallized samples of reinforced pages were fed through a Xerox machine Model 2400. None of them failed. Additional samples that were not metallized came apart during similar tests run at about the same time on the same machine.
The readers attention is directed to the expired US. Pat. No. 2,502,785 which teaches a piece of metal foil secured to one edge of a filing card, or business machine card. This patent discloses little tabs of card material 5, 6, 7 (reference numbers of said patent) which can be pulled loose to expose the metal underneath. There is no hole punched through the metallic member 8.
The invention claimed is:
l. A method of printing on a reinforced page having adhered thereto by an adhesive an edge reinforcement with holes therethrough, comprising passing said page through a xerographic dry printing machine, applying an image on at least a portion of such page, and exposing said edge reinforcement to a source of heat in said machine, providing a metal or metallized surface on said edge reinforcement whereby heat from said source is reflected, and maintaining said metallized surface facing toward said source of heat and between said source and said page during the time said page is exposed to said source.
2. A printing method according to claim 1 wherein said edge reinforcement is aluminum foil.
3. A printing method according to claim 1 wherein said adhesive is a thermoplastic adhesive.
4. A printing method according to claim 1 wherein said adhesive is pressure sensitive.
5. A printing method according to claim 1 wherein said edge reinforcement is polyester film.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2059148 *||Aug 24, 1934||Oct 27, 1936||Nat Blank Book Co||Paper sheet for loose leaf book pages|
|US2375582 *||Mar 1, 1944||May 8, 1945||Pitt William P||Sheet for loose-leaf book pages|
|US2422935 *||Sep 5, 1944||Jun 24, 1947||Gen Fireproofing Co||Lug for guide cards|
|US3591400 *||Oct 6, 1967||Jul 6, 1971||Minnesota Mining & Mfg||Heat-reflective fabrics|
|US3637983 *||Jun 1, 1970||Jan 25, 1972||Nelson Victor R||Drier for sheet material|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4979919 *||Apr 16, 1990||Dec 25, 1990||Hitachi, Ltd.||Method and apparatus for manufacturing cathode-ray tubes|
|US7503369 *||Feb 3, 2005||Mar 17, 2009||Luyu Yang||Electric paper reinforcer/hole puncher (EPRHP)|
|US20060171773 *||Feb 3, 2005||Aug 3, 2006||Luyu Yang||Electric paper reinforcer / hole puncher (EPRHP)|
|U.S. Classification||432/16, 432/226|
|International Classification||G03G7/00, G03B27/30, G03B27/02|
|Cooperative Classification||G03G7/00, G03B27/306|
|European Classification||G03B27/30H, G03G7/00|