Patent Application
20170328009
Tissue products are often provided in roll form, such as paper towels and toilet paper. Such rolled tissues products are most commonly white. Some consumers enjoy tissue products with visible designs or decorative patterns. Such designs may be delivered to the tissue product via ink, dye, or other technique.
It has been discovered that in the case of certain products, consumers like a decorative design that is flush with at least one edge of the tissue sheet, such as a decorative pattern that is flush with at least one edge of a paper towel. Consumers associate such a design as evoking the character of durable cloth towels, and/or as better coordinating with colors and patterns present in kitchen decor.
One common method of manufacturing rolled tissue products is to print the tissue, to then wind the tissue into a long “log,” usually with a cardboard core therein, and to then slice the log into individual rolls. In existing rolled printed tissue product converting processes, the roll is left unprinted in areas where the log is cut, due to the difficulty in precise cross-direction registration of the wound tissue, and due to the desire to not have partially cut off transversely registered graphics. Printing the entire tissue web is one solution, but such an approach lacks the ability to deliver a towel with graphics tailored to make one or more border regions resemble cloth towels or to properly coordinate with kitchen decor.
Therefore, there is a need for a method of manufacturing rolled tissue products having a flush printed border from long “logs.”
The invention is direct to a method of manufacturing rolls of printed tissue, each roll having a roll height. The method includes providing a tissue web having a machine direction and a transverse cross-machine direction. The method further includes printing a central pattern on the tissue web to create a central printed lane extending in the machine direction, the central printed lane having a first edge and a second edge, both parallel to the machine direction, the central printed lane being bordered along the first edge by a first unprinted lane and along the second edge by a second unprinted lane. The central printed lane has a central printed lane width that extends between the first edge and the second edge, and the central printed lane width is less than 1.5 times the roll height. The method further includes printing a first distal pattern on the tissue web to create a first distal printed lane bordered by the first unprinted lane, and printing a second distal pattern on the tissue web to create a second distal printed lane bordered by the second unprinted lane. The method further includes winding the tissue web into a log. The method further includes cutting the log parallel to the machine direction with a cutter through a central cut line to produce first and second rolls of tissue, each roll having a proximal end and a distal end, the central cut line positioned transversely between the first edge and the second edge of the central printed lane, wherein the cutter contacts ink when cutting the log. A first printed portion from the central printed lane abuts the proximal end of the first roll of tissue, and a second printed portion from the central printed lane abuts the proximal end of the second roll of tissue. The first distal printed lane resides near but does not abut the distal end of the first roll of tissue, and the second distal printed lane resides near but does not abut the distal end of the second roll of tissue.
The invention relates to methods of manufacturing rolls of printed tissue, such as paper towels, toilet tissue, or paper napkins. Methods of making such tissue, including wet-laid methods and air-laid methods, are known in the art. Each roll has a roll height 50.
Referring to
The method in particular embodiments further includes printing a central pattern 16 on the tissue web 10 to create a central printed lane 18 extending in the machine direction 12. In
The method in particular embodiments further includes printing a first distal pattern 30 on the tissue web 10 to create a first distal printed lane 32 bordered by the first unprinted lane 24, and further includes printing a second distal pattern 34 on the tissue web 10 to create a second distal printed lane 36 bordered by the second unprinted lane 26. In
The method further includes winding the tissue web 10 into a log 37. Winding techniques are known in the art. The method further includes cutting the log 37 parallel to the machine direction 12 with a cutter 38 through a central cut line 40 to produce a first roll of tissue 42 and a second roll of tissue 43. Each roll 42, 43 has a proximal end 44 and a distal end 45. The central cut line 40 is positioned transversely between the first edge 20 and the second edge 22 of the central printed lane 18. The cutter 38 contacts ink when cutting the log 37. In particular embodiments, the method further includes cutting the log 37 along a first distal cut line 52 to define the distal end 45b of the first roll 42, and cutting the log 37 along a second distal cut line 54 to define the distal end 45a of the second roll 43. In particular embodiments, the cut made along the first distal cut line 52 can define a third roll of tissue 56 (depicted in
In particular embodiments, a first printed portion 46 from the central printed lane 18 abuts the proximal end 44b of the first roll of tissue 42, and a second printed portion 48 from the central printed lane 18 abuts the proximal end 44a of the second roll of tissue 43. “Abuts” means that at least some printed color (e.g., ink) is flush with the relevant end of the roll of tissue. In particular embodiments, the first distal printed lane 32 resides near but does not abut the distal end 45b of the first roll of tissue 42, and the second distal printed lane 36 resides near but does not abut the distal end 45a of the second roll of tissue 43. In particular embodiments, the first distal printed lane 32 is at all points spaced at least one inch from the distal end 45b of the first roll 42, and the second distal printed lane 36 is at all points spaced at least one inch from the distal end 45a of the second roll. Such spacing minimizes the probability that the distal printed lanes 32, 36 will be inadvertently cut by a cutter.
As shown in
Each pattern is printed using a printer 15. Printing apparatus suitable for use as the printer 15 are known in the art, and include such examples as flexographic printers, ink jet printers, laser printers, rotogravure printers, and other printing apparatuses suitable for printing tissue webs.
Referring to
The alternative embodiment of the method further includes printing a first pattern 116 on the tissue web 10 to create a first printed lane 118 extending in the machine direction 12. The first printed lane 118 has a first edge 120 and a second edge 121, both of which are parallel to the machine direction 12. The first printed lane 118 is bordered along the first edge 120 by a first unprinted lane 122, and is bordered along the second edge 121 by a second unprinted lane 123. The first printed lane 118 has a first printed lane width 124 that extends between the first edge 120 and the second edge 121. In particular embodiments, the first printed lane width 124 is less than two times the roll height 50, more particularly less than 1.5 times the roll height, still more particularly less than one roll height, yet more particularly less than 0.75 times the roll height, and still more particularly less than half of one roll height.
The alternative embodiment of the method further includes printing a second pattern 117 on the tissue web 10 to create a second printed lane 119 extending in the machine direction 12. The second printed lane 119 has a third edge 125 and a fourth edge 126, both of which are parallel to the machine direction 12. The second printed lane 119 is bordered along the third edge 125 by a third unprinted lane 127 and along the fourth edge 126 by a fourth unprinted lane 128. The second printed lane 119 has a second printed lane width 129 that extends between the third edge 125 and the fourth edge 126. In particular embodiments, the second printed lane width 129 is less than two times the roll height 50, more particularly less than 1.5 times the roll height, still more particularly less than one roll height, yet more particularly less than 0.75 times the roll height, and still more particularly less than half of one roll height.
The alternative embodiment of the method further includes printing a third pattern 130 to create a third printed lane 131 extending in the machine direction 12, and printing a fourth pattern 132 to create a fourth printed lane 133 extending in the machine direction 12. The third printed lane 131 and the fourth printed lane 133 are each transversely between the first printed lane 118 and the second printed lane 119. The third printed lane 131 is bordered by the first unprinted lane 122 and the fourth printed lane 133 is bordered by the third unprinted lane 127. The third printed lane 131 is separated from the fourth printed lane 133 by a fifth unprinted lane 134.
The embodiment further includes winding the tissue web 10 into a log 137. The method further includes cutting the log 137 parallel to the machine direction 12 with first, second, and third cutters 138, 139, 140 through first, second, and third cut lines 142, 143, 144, respectively, to produce first, second, third, and fourth rolls of tissue 146, 151, 156, 161. The first cut line 142 is positioned in the first printed lane 118, and the first cutter 138 contacts ink when cutting the log 137. The second cut line 143 is positioned in the second printed lane 119, and the second cutter 139 also contacts ink when cutting the log 137. The third cut line 144 is positioned in the fifth unprinted lane 134, and the third cutter 140 does not contact ink when cutting the log 137.
In the embodiment, a first half 149 of the first pattern 116 abuts a first end 147 of the first roll 146. A second half 154 of the first pattern 116 abuts a first end 152 of the second roll 151. A first half 159 of the second pattern 117 abuts a first end 157 of the third roll 156. Finally, a second half 164 of the second pattern 117 abuts a first end 162 of the fourth roll 161.
The first roll 146 has a second end 148, the second roll 151 has a second end 153, the third roll 156 has a second end 158, and the fourth roll 161 has a second end 163. No pattern abuts any second end 148, 153, 158, 163 of any of the first, second, third, and fourth rolls 146, 151, 156, 161.
In particular embodiments of the alternative embodiment, as shown in
Referring to
While the invention has been described in detail with respect to the specific aspects thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing, may readily conceive of alterations to, variations of, and equivalents to these aspects. Accordingly, the scope of the present invention should be assessed as that of the appended claims.
