The present invention relates generally to printing presses and more particularly to broadsheet newspaper printing presses.
The newspaper industry has been hit with high newsprint costs. Broadsheet newspapers, which typically are approximately 22 inches in height (11 inches when folded) and 15 inches wide, have for example switched to narrower widths such as 12 inches or to tabloid format.
Tabloid format has the disadvantage that sections are difficult to form without stitchers, and inserting is difficult as well.
Typical broadsheet newspapers also may run in straight or collect mode. A two-around printing plate cylinder has two printing plates mounted thereon. In collect mode, the two-around printing cylinder press results in an even number of sections, each former producing two sections.
Currently, three-section broadsheet newspapers are produced by straight mode production in conjunction with inserting as a post-press process, or by hand production.
The present invention provides a broadsheet newspaper printing press including an image carrier carrying three images around in broadsheet newspaper format. The image carrier transfers the three images to a web. A folder imparts a longitudinal fold to the web and cuts the web into broadsheet newspaper pages. The folder includes a cylinder cross-folding the broadsheet newspaper pages off center. The cross-fold may be located 41% or less from an edge of the newspaper or 59% or more from an edge of the newspaper. The cross-fold may also be located 9 inches or more from an edge of the newspaper. The cross-fold is preferably located 10.5 inches from an edge of the newspaper.
The present invention also provides a web offset broadsheet newspaper printing press including a plate cylinder carrying at least one printing plate and a blanket cylinder carrying at least one blanket. The plate cylinder carries at least three images around in broadsheet newspaper format. The at least one blanket contacts a web to print the at least three images on the web. A folder imparts a longitudinal fold to the web, and cuts the web into broadsheet newspapers, the folder includes a cylinder cross-folding the broadsheet newspapers off center.
The present invention further provides a method of printing a three section broadsheet newspaper including the steps of: imaging a web with three images from a single plate cylinder; collecting the three section newspaper in a folder; and offsetting a fold in the newspaper so a face of the newspaper has a height of at least 9 inches and is greater than a height of a flap in the newspaper.
The present invention even further provides a method for converting a two-around broadsheet newspaper press to a three-around broadsheet printing press including the steps of: providing three images around a plate cylinder having a same circumference as that used for the two-around broadsheet printing press, printing the three images on a web; forming broadsheet pages from the web; and cross-folding broadsheet pages at a location so that one side of the cross-folded broadsheet page has a length similar to one of the newspapers printed by the two-around broadsheet newspaper press, while the other side is shorter.
The present invention additionally provides a method for printing a broadsheet newspaper including the steps of: providing three images around an image carrier of a printing press, printing the three images on a web; forming broadsheet pages from the web; running a folder in collect mode to collect three sections of broadsheet pages, and cross-folding the sections off center.
Moreover, the present invention provides a method of printing a three section broadsheet newspaper including the steps of: imaging a web with three images from a single image carrier; collecting the three section newspaper in a folder; and offsetting a fold in the newspaper so the fold is between about 25 percent to about 41 percent from a top or bottom edge of the newspaper, a face of the newspaper having a height greater than a height of a flap in the newspaper.
A preferred embodiment of the present invention will be elucidated with reference to the drawings, in which:
The present applicant has developed a novel way to reduce newsprint costs, permit broadsheet newspapers to reduce newsprint costs, permit standard-sized inserts and permit three broadsheet sections to be created during a collect run.
The present invention is highly advantageous as a retrofit to existing two-around broadsheet presses. For example a 44 inch circumference plate cylinder that previously printed two 22-inch broadsheet sections can be converted to print three 14⅔-inch broadsheet sections, each with a 10.5-inch front side and a 4.17-inch back side for example. During a collect operation in the folder, three sections can be provided without the need for inserting.
By using the three-around plate cylinder instead of a two-around plate cylinder, more pages per plate cylinder may be printed and three sections per web may be formed. Page capacity of a broadsheet newspaper may be efficiently increased by providing 50 percent more pages per plate cylinder without resorting to additional printing towers and associated supporting equipment such as folders.
Web 100 may be slit by a slitter 120 into ribbons which are recombined, potentially with other ribbons 110, at a roller 130. Ribbons of web 100 then enter a folder 80 and pass to a former board 140 for folding the ribbons longitudinally. A cross cutter 150 of folder 80 then cuts ribbons into broadsheet newspaper pages which are gripped at a lead edge by a collect cylinder 160. The collect cylinder 160 has pins that selectively articulate to release a page for cross-folding, or retain a page to collect with other pages. Newspapers 92 are then tucked and cross-folded into a folding cylinder, for example, jaw cylinder 170. After folding, newspapers 92 are released to, for example, a fan wheel, a belt conveyor and a gripper pick-up, then delivered to a pocket conveyor 98, only the pocket conveyor being shown here for simplicity. The fan wheel and belt conveyor are shown for example in U.S. Pat. No. 6,733,341, hereby incorporated by reference herein.
A controller 90 may set the phasing between pins and tuckers of collect cylinder 160, and control the phasing of jaws of folding cylinder 170, so that a cross-fold distance can be set. Owing to the phasing control, the cross-fold may be set so a face of the newspaper has a height of, for example, at least nine inches. Preferably, the cross-fold is set so the face of the newspaper has a height of 10.5 inches. The cross-fold may be located 41% or less from an edge of the newspaper or 59% or more from the edge of the newspaper. The offset fold advantageously permits smaller format newspapers to receive standard inserts for example by providing a longer side. Alternatively, the cross-fold position may be set mechanically.
Broadsheet newspapers having a height of 14.67 inches, for example, thus can be formed, while still permitting the newspaper to receive standard advertising inserts. Newsprint savings of (22−14.67)/22 or 33 percent advantageously can be achieved while retaining the advantages of a broadsheet format. One advantage includes permitting sectioning without stitching or separate inserting, by using a collect mode. The three-around press of the present invention thus can provide three broadsheet sections, for example a main section, sports section and business section, without any further inserting.
For example, as shown in the prior art,
In
A plate cylinder and printing plate mounted thereon typically has a circumference of 44 inches. The typical two-around plate cylinder shown in
In the preferred embodiments of the present invention shown in
In collect production,
In accordance with a preferred embodiment of the present invention,
During collect production, the layout is shown in
A suitable folder may include collect and jaw folding cylinder geometries such as a 4-part collect, 4-part jaw, or a 7-part collect, 7-part jaw, and may include articulating pins for collecting and releasing the newspaper sections.
Web 100 has been printed with images C, B and A, slit into ribbons 104, 106 and combined to form corresponding sections C, B and A upstream (
As shown in
Controller 90 (
While folder 80 has been shown with a collect cylinder including four pin sets and four tuckers, other configurations including seven pin sets and seven jaw configurations are also possible. Moreover, while the folder has been shown with a collect cylinder with pins and tuckers, other configurations such as a folder employing rotary tuckers and folding rollers, a so-called rotary blade folder, is possible. In that case, the jaw cylinder is replaced by folding rollers which receive the folded signatures from a collect cylinder. U.S. Pat. No. 6,688,224 for example is hereby incorporated by reference herein as showing a rotary blade folder.
Furthermore, the printing press shown in
Further preferred embodiments provide a cross-fold may be located 41% or less from an edge 93 of the newspaper or 59% or more from the edge 93 of the newspaper. Thus, height H1 may be 59% or more or 41% or less of total newspaper height, H0, respectively. Consequently, height H2 may be 41% or less or 59% or more of total newspaper height H0, respectively. Cross-fold 94 may also be located 9 inches or more from an edge of the newspaper. The cross-fold is preferably located 10.5 inches from the edge of the newspaper as shown in
As shown in
Newspaper 92 may be completely unfolded as shown in
A three-around printing press may be advantageous when printing in straight mode because production speeds are higher resulting in three newspapers per press revolution rather than one or two, as in the cases of traditional presses having only one or two pages around.
A three-around printing press may be advantageous when printing in collect mode, because sections are produced in multiples of three (3, 6, 9, etc. . . . ), rather than in multiples of two (2, 4, 6, etc. . . . ) as in traditional two-around presses. Furthermore, some newspaper presses have capabilities for full color on only some of the webs. In these cases, having three pages around increases the color page capacity of the press by 50 percent over a two-around press.
Retrofitting of existing presses to adapt to the three-around style may occur by adding, filling or removing existing printing plate lock-ups as necessary. Printing plate lock-ups may be filled, for example, by adding fiberglass, or another suitable material, to fill the voids, in order to provide a suitable surface for printing an image. Alternatively, a metal bar may be welded into the cylinder to fill the void. The remaining voids may be filled with resin to provide a suitable surface.
Alternatively, the lock-up apparatus may be physically removed from the cylinder. The cylinder may then be filled or repaired so a printing plate can be mounted thereon for successful imaging. For one plate around printing cylinders, printing plates will now be imaged with three images as opposed to one or two images. In addition, a new printing plate cylinder designed to print three images may be employed.
In the preceding specification, the invention has been described with reference to specific exemplary embodiments and examples thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of invention as set forth in the claims that follow. The specification and drawings are accordingly to be regarded in an illustrative manner rather than a restrictive sense.
This claims priority to U.S. Provisional Application No. 61/126,434, filed on May 5, 2008 and U.S. Provisional Application No. 61/135,705 filed on Jul. 23, 2008, the entire disclosures of which are hereby incorporated by reference herein.
Number | Date | Country | |
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61135705 | Jul 2008 | US | |
61126434 | May 2008 | US |