Patent Grant
7288163
The present invention relates to printing sheet constructions which are adapted to be fed into printers or copiers and indicia printed on different portions thereof and the portions thereafter separated into separate printed media, such as business cards. It further is concerned with methods for making those printing sheet constructions and also the separate printed media.
Small size media, such as business cards, ROLODEX-type card file cards, party invitations and visitors cards, because of their small format, cannot be fed into and easily printed using today's ink jet printers, laser printers, photocopiers and other ordinary printing and typing machines. Therefore, one known method of producing small size media has been to print the desired indicia on different portions of a large sheet such as 8½ by 11 or 8½ by 14 or A4 size sheets, and then to cut the sheets with some type of cutting machine into the different portions or individual small size sheets or media with the printing on each of them. However, this method is disadvantageous because the user must have access to such a cutting machine, and the separate cutting step is cost and time inefficient.
To avoid this cutting step, another prior art product has the portions of the sheet which define the perimeters of the media (e.g., the business cards) formed by preformed perforation lines. (See, e.g., PCT International Publication No. WO 97/40979.) However, a problem with this product was that since these cards must be durable and professional looking, they had to be made from relatively thick and heavy paper. And the thick, heavy perforated sheets are relatively inflexible, such that they cannot be fed from a stack of such sheets using automatic paper feeders into the printers and copiers. One proposed solution to this feeding problem is disclosed in U.S. Pat. No. 4,704,317 ('317) to Hickenbotham. (This patent and all other patents and other publications mentioned anywhere in this disclosure are hereby incorporated by reference in their entireties.) The method of the '317 patent reduces the stiffness of the corners of the sheet as by scoring, slitting, die cutting or calendering. However, a number of problems with this method prevented it from becoming generally commercially acceptable.
Another attempted solution to the sheet feeding problem is that disclosed in U.S. Pat. No. 5,571,587 ('587) to Bishop et al. (See also U.S. Pat. No. 4,447,481 to Holmberg et al.) Pursuant to the '587 patent the sheetstock has a relatively thin portion on at least one of the longitudinal edges thereof which facilitates feeding the sheetstock into a printer or copier. The thin portion is removed from the sheet after printing. The individual printed cards are then separated from one another by pulling or tearing along the preformed microperforated lines. While the perforation ties remaining along the edges of the printed cards thereby formed are small, they are perceptible, giving the card a less than professional appearance and feel.
A card sheet construction which uses clean cut edges instead of the less desirable perforated edges is commercially available from Max Seidel and from Promaxx/“Paper Direct”, and an example of this product is shown in the drawings by
One of the problems with the prior art sheet product 100 is that printers have difficulty picking the sheets up, resulting in the sheets being misfed into the printers. In other words, it is difficult for the infeed rollers to pull the sheets past the separation tabs within the printers. Feeding difficulties are also caused by curl of the sheetstock 102 back onto itself. The “curl” causes the leading edge of the sheet to bend back and flex over the separation tabs. Since the sheetstock 102 is a relatively stiff product, it is difficult for the infeed rollers of the printer 120 to handle this problem.
Another problem with the prior art sheet 100 is a start-of-sheet, off-registration problem. In other words, the print is shifted up or down from its expected desired starting position below the top of the sheet. This off-registration problem is often related to the misfeeding problem discussed in the paragraph above. This is because if the printer is having difficulty picking up the sheet, the timing of the printer is effected. And this causes the print to begin at different places on the sheet, which is unacceptable to the users.
Directed to remedying the problems in and overcoming the disadvantages of the prior art, disclosed herein is a dry laminated sheet construction including printable media, such as business cards, ROLODEX type cards, party invitations, visitor cards or the like. A first step in the formation of this dry laminated sheet construction is to extrusion coat a low density polyethylene (LPDE) layer on a densified bleached kraft paper liner, thereby forming a film-coated liner sheet. Using a layer of hot melt adhesive, a facestock sheet is adhered to the film side of the liner sheet to form a laminated sheet construction web. A more generic description of the “dry peel” materials—the LPDE, and densified bleached kraft paper liner—is a film forming polymer coated onto a liner stock. The facestock sheet, the film layer and the adhesive layer together define a laminate facestock. (See U.S. Pat. No. 4,863,772 (Cross); see also U.S. Pat. No. 3,420,364 (Kennedy), U.S. Pat. No. 3,769,147 (Kamendat et al), U.S. Pat. No. 4,004,058 (Buros et al), U.S. Pat. No. 4,020,204 (Taylor et al), and U.S. Pat. No. 4,405,401 (Stahl)). The sheet construction (which also includes a facestock bonded to the film forming polymer) separates at the film-liner interface rather than the facestock-film interface, when the final construction is subjected to a peeling force.
According to one embodiment of this invention, a web of laminate facestock is calendered along one or both edges thereof to assist in subsequent printer feed of the printable media sheets. The calendered edges help prevent the multiple sheet feed-through, misfeed and registration problems of the prior art. Lines are die cut through the laminate facestock and to but not through the liner sheet. These facestock cut lines define the perimeters of blank business cards (or other printable media) and a surrounding waste paper frame. These die cut lines do not cause sheets to get caught in one another. This allows sheets to be effectively fed into printers. Lines are then cut through the liner sheet, but not through the laminate facestock, to form liner sheet strips on the back face of the laminate facestock. The liner sheet cut lines can each be straight lines or they can be curving, wavy lines. The lines can be horizontally (or vertically) straight across the sheet or diagonally positioned thereon. According to one alternative, the lines can extend only part way across the sheet, such as from both side edges, to only a central zone of the sheet. Further steps in the process are to sheet the web into individual sheets, stack and package them and distribute the packaged sheets through retail channels to end users.
The laminated (business card) sheets are unpackaged by the user and stacked into the feed tray of a printer or copier and individually and automatically fed, calendered edge first into a printer (and particularly a horizontal feed ink jet printer) or copier where indicia is printed on each of the printable media (or blank business cards) on the sheet. After the printing operation, each of the printed media (or business cards) is peeled off of the liner sheet strips and out from the waste paper frame. The support structure formed by the strips and the frame is subsequently discarded. Alternatively, the support structure is peeled off of the printed business cards. The product, in either event, is a stack of cleanly printed business cards, each having clean die cut edges about its entire perimeter.
In other words, the adhesive layer securely bonds the facestock sheet to the LPDE film layer on the liner sheet. It bonds it such that the overall sheet construction separates or delaminates at the film-liner sheet interface, when the user peels the printed business cards and liner strips apart. That is, it does not separate at the facestock sheet interface. Additionally, the film-coated liner sheet does not significantly affect the flexibility of the sheet as it is fed through the printer. Rather, it is the thickness of the facestock which is the more significant factor. Thus, the facestock sheet needs to be carefully selected so as to not be so stiff that feeding or printing registration problems result.
Pursuant to some of the preferred embodiments of the invention, every other one of the strips is peeled off and removed from the sheet during the manufacturing process and before the sheet is fed into a printer or copier. The remaining strips cover a substantial number of the laminated facestock cut lines and extend onto the waste paper frame to hold the business card blanks and the sheet together as they are fed into and passed through the printer or copier. The remaining strips (and thus the facestock cut lines) preferably extend width-wise on the sheet or are perpendicular to the feed direction of the sheet to make the laminated sheet construction less stiff and more flexible as it passes into and through the printer or copier. By starting off with a single continuous liner sheet to form the strips, the final stripped product is flatter than the prior art products. Thus, it is less likely that the sheets will bow and snag together.
Other embodiments do not remove any of the strips before the sheet is fed into the printer or copier. In other words, the entire back side of the laminated facestock is covered by the liner sheet having a series of liner-sheet cut lines.
A further definition of the method of making this invention includes forming a roll of a web of dry laminate sheet construction comprising a liner sheet on a facestock sheet. The web is unwound under constant tension from the web and the edges of the web are calendered. The facestock sheet of the unwound web is die cut without cutting the liner sheet to form perimeter outlines of the printable media (business cards). The liner sheet is then die cut, without cutting the facestock sheet, to form liner strips. Alternating ones of the interconnected liner strips are removed as a waste liner matrix and rolled onto a roll and disposed of. The web is then sheeted into eleven by eight-and-a-half inch sheets, for example, or eight-and-a-half by fourteen or in A4 dimensions; the sheets are stacked, and the stacked sheets are packaged. The user subsequently removes the stack of sheets from the packaging and positions the stack or a portion thereof in an infeed tray of a printer or copier for a printing operation on the printable media or individually feeds them into the printer or copier. After the printing operation, the printed media are separated from the rest of the sheet, as previously described.
Sheet constructions of this invention appear to work on the following ink jet printers: HP550C, HP660C, HP722C, HP870Cse, Canon BJC620, Canon BJC4100, Epson Stylus Color II and Epson Stylus Color 600.
Another advantage of the embodiments of the present invention wherein alternate strips of the liner are removed before the printing operation is that a memory curl is less likely to be imparted or induced in the business cards from the liner sheet. Memory curl occurs when the facestock is removed from a full liner sheet. The liner strips are better than liner sheets since they reduce the amount of memory curl that occurs during removal of the facestock.
A further embodiment of this invention has a strip of the laminated facestock stripped away at one end of the sheet to leave a strip of the liner sheet extending out beyond the end of laminated facestock. This liner strip defines a thin infeed edge especially well suited for feeding the sheets into vertical feed printers and appears to work better than calendering the infeed edge. The opposite (end) edge of the laminated facestock can also be stripped away to leave an exposed liner sheet strip. Alternatively, the opposite edge of the laminated facestock can be calendered. The calendered edge appears to work better for feeding the sheets into horizontal feed printers. And instructions can be printed on the sheet (or on the packaging or on a packaging insert) instructing the user to orient the sheet so that the exposed liner strip defines the infeed end when a vertical feed printer is used and to orient the sheet so that the calendered edge defines the infeed end when a horizontal feed printer is used.
In fact, this inventive concept of the exposed liner strip at one end and the calendered edge at the other end can be used for other sheet constructions adapted for feeding into printers for a printing operation thereon. An example thereof is simply a face sheet adhered to a backing sheet. The backing sheet does not need to have cut lines or otherwise formed as strips. And the face sheet does not need to have cut lines; it can, for example, have perforated lines forming the perimeters of the business cards or other printable media.
Other objects and advantages of the present invention will become more apparent to those persons having ordinary skill in the art to which the present invention pertains from the foregoing description taken in conjunction with the accompanying drawings.
A number of different embodiments and manufacturing processes of the dry laminated business card sheet constructions of this invention are illustrated in the drawings and described in detail herein. A representative or first sheet construction is illustrated generally at 200 in
Referring to
A preferred example of this dry laminate facestock construction 224 is the “Dry Tag” product such as manufactured at the Fasson Roll Division of Avery Dennison Corporation. The facestock sheet 212 can alternatively be fluorescent paper, high gloss paper or thermal transfer label paper. A preferred high photo glossy paper which can be used is the glossy cardstock which is available from Rexam Graphics of Portland, Oreg. and has a thickness of approximately eight mil.
Preferred thicknesses of each of the layers of the laminate facestock construction 224 are as follows: the liner sheet 208—3.0 mil; the LDPE film layer 204—0.80 to 1.0 mil; the adhesive layer 216—0.60 to 0.75 mil; and the facestock sheet 212—8.3 or 8.5 to 9.0 mil. Alternatively, the liner sheet 208 plus the film layer 204 can have a 3.5 mil thickness. Another alternative is for the thicknesses of the facestock sheet 212 and the liner sheet 208 to be approximately 6.0 and 3.0 mil, respectively, or approximately 7.0 and 2.0 mil, respectively. The LDPE layer 204 will not significantly affect the flexibility of the sheet construction; rather, it is the thickness of the facestock 212 which is the more significant factor. To assist the picking up and feeding of the laminate facestock construction 224 into the printer or copier 230, the leading edge 234 can be, according to one definition of this invention, calendered or crushed, as shown in
In addition to calendering the leading edge 234 of the laminate facestock construction 224, further processing steps are needed to form the sheet construction 200. One key step is to form cut lines 240 on and through the laminate facestock. Referring to
The facestock cut lines 240 extend through the laminate facestock construction 224 and to but not through the liner sheet 208. If the facestock cut lines 240 passed through the liner sheet 208, the laminate facestock construction 224 would fall apart into the rectangular media 280 and the frame 260, each separate from the other. The separate small media cannot be passed effectively through the printer or copier 230 for a printing operation on them. Instead, the facestock cut lines 240 do not pass through the liner sheet 208. However, the continuous liner sheet 208, while it would hold the (ten) rectangular media 280 and the frame 260 together during the printing operation, may make the sheet construction 200 too rigid, lacking the flexibility to pass through the curving feed paths in printers or copiers. In some of the figures which show the back or liner face of the sheet construction, the facestock cut lines 240 are shown in dotted lines to depict their relationship with the liner sheet strips as discussed below. Although the facestock cut lines 240 and the liner-sheet cut lines discussed below are preferably formed by die cutting, other techniques such as laser cutting or using a circular cutting blade as would be known by those skilled in the art are within the scope of this invention.
Therefore, pursuant to the present invention, liner-sheet cut lines 300 are formed on the liner sheet 208, through the liner sheet and to but not through the laminate facestock 224. They divide the liner sheet 208 into liner strips 304. The liner-sheet cut lines 300 provide flexibility to the sheet construction 200 and according to some of the embodiments of this invention, adequate flexibility. However, for others the flexibility is not enough, so these embodiments provide that some of the strips are removed from the laminate facestock 224 to form the sheet construction which is passed through the printer or copier 230. More importantly, by removing some of the liner strips, the amount of memory curl induced in the (printed) media is reduced. The remaining strips 308, however, must be sufficient to hold the cut laminate facestock 224 together during the printing operation. In other words, the shape and location of the remaining strips 308 are selected on the one hand to provide sufficient sheet flexibility and to minimize memory curl and on the other hand to provide sufficient sheet integrity. In particular, according to preferred embodiments, the remaining strips cover all of the facestock cut lines 240 which are parallel to the infeed edge of the sheet. Where the sheet is to be fed in the portrait direction into the printer or copier 230, the covered facestock cut lines extend width-wise on the sheets.
The embodiment of
While sheet constructions 200, 350 show the liner-sheet cut lines and thus strips 308, 340 extending straight across the sheet, sheet construction 380 has its liner-sheet cut lines 384 extending diagonally across the back of the laminate facestock. This construction is shown in
The liner-sheet cut lines 300, 384 are discussed above and as shown in the corresponding drawing figures are all straight lines. However, it is also within the scope of the invention to make them curving or wavy, and a sheet construction embodiment having wavy or curving lines 412 is illustrated generally at 416 in
It is also within the scope of the present invention for the liner-sheet cut lines and thus the liner strips to not extend from one side or edge of the sheet to the other. A sheet construction embodying such a configuration is shown in
Flexibility of the sheet constructions at both ends thereof is important. Accordingly, referring to
A preferred embodiment of the liner sheet or the liner-sheet cut lines 300 and liner strips is illustrated by sheet construction shown generally at 482 in
Accordingly, the sheet construction 482 of
Each of the thin strips 494 and each of the central wide strips 490 extend a distance past the vertical frame cut lines, but not to the edge of the sheet. In other words, a liner edge or margin is left on both sides extending between the end wide strips 486. What this means is that the liner sheet “strips” which are removed after the liner-sheet cut lines are made and before the sheet construction is sent to the user for a printing operation are interconnected into a web or matrix. That is, all of the liner portions (or strips) between the thin strips 494 and the adjacent wide strips 486, 490 and between the adjacent thin strips are connected to the borders or margins and thereby to each other in a continuous web or matrix. Thus, by grabbing any portion of this matrix, and preferably a corner thereof, the entire matrix can be pulled off of the laminate facestock in essentially one step. As will be described with reference to
Both end edges are crushed or calendered as can be seen in
A schematic view of the system and process for manufacturing the laminate sheet construction 482 of
The web 554 is then pulled to the turning station shown generally at 580 where a turn bar 584 turns the web over so that the liner side is facing up and the facestock side is facing down for delivery to the calendering station. At the calendering station shown generally at 588 and including an anvil 592 and a calendering die 596, both edges of the web on the facestock side thereof are crushed for about 7/16 inch from a 13.4 mil thickness to approximately 10.4 mil.
The web 554 is pulled further to the two die cutting stations. The face cutting station shown generally at 600 includes an anvil 604 and a face cutting die 608, with the anvil positioned on top. At this station the face of the web 554 is cut up to the liner but without cutting the liner to create the business card shapes on the face with cut lines, as previously described. At the liner cutting station as shown generally at 620, the anvil 624 is positioned below the liner cut die 628, in a relative arrangement opposite to that at the face cutting station 600. The liner at this station 620 is die cut up to the face without cutting the face. At these die cutting stations 600, 620 a bridge bears down on the die bearers, which forces the die blades to cut into a predetermined portion of the caliper or thickness of the web. This portion is called a step, and is the difference between the bearer and the end of the die cutting blades. The smaller the step, the deeper the cut into the web, as would be understood by those skilled in the die cutting art.
The liner cutting forms the waste matrix 640 of the liner sheet. This matrix 640 is grabbed and pulled off of the web 554 and wound onto a roll 644 at the waste matrix station, which is shown generally at 648. The finished web 652 is thereby formed and delivered to the sheeting station. The calendering station 588, the face cutting station 600, the liner cutting station 620 and the waste matrix station 648 can essentially be arranged in any order except that the waste matrix station must follow the liner cutting station.
The sheeting station which is shown generally at 660 includes an anvil 664 and a sheeter cylinder 668. The eleven-inch wide web 652 is sheeted into eight-and-a-half inch sheets 672. Of course, if different sizes of sheets 672 (or 482) are desired (such as 8½ by 14 inch or A4 size) then the width of the web and/or the sheeting distance can be altered or selected as needed. The final sheet constructions 672 (or 482) are shown stacked in a stack 680 at the stacking station, which is illustrated generally at 684. Each stack 680 of sheets can then be packaged and distributed to the end user through normal retail distribution channels.
The end user then unpackages the sheets and stacks them in a stack 686 in the infeed tray 694 of a printer (particularly an ink jet printer) or copier 230, such as shown in
The individual printed media or business cards 700 are then peeled off of the rest of the sheet construction in an operation as shown in
A further preferred embodiment of the present invention is shown generally at 710 in
Two alternative systems or method for stripping the laminate facestock strip are illustrated in
The other method or system does not use the separate stripping station 728. Instead the stripping is conducted in the facility 550. The die cut line 724 is made at the face cutting station 600. The facestock strip is then removed at the removal station shown generally at 740, which can be part of waste matrix station 648. At removal station 740, the face strip 744 is wrapped around a driven roll 748 and exhausted using an air line 752 into a vacuum system.
The arrangement of having one end of a sheet construction formed by stripping a strip (744) of a face sheet (such as laminate facestock) off of a backing sheet (such as a liner sheet) can be used not only on sheet construction 710 and the other previously-described sheet constructions but also on generally any multi-sheet construction.
An example thereof is the sheet construction shown generally at 780 in
From the foregoing detailed description, it will be evident that there are a number of changes, adaptations and modifications of the present invention which come within the province of those skilled in the art. For example, the printed media instead of being business cards can be post cards, mini-folded cards, tent cards or photo frames. However, it is intended that all such variations not departing from the spirit of the invention be considered as within the scope thereof.
This is a continuation of copending patent application Ser. No. 09/158,308 filed Sep. 22, 1998.
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| Number | Date | Country | |
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| Parent | 09158308 | Sep 1998 | US |
| Child | 10366005 | US |
