US 9,393,754 B2Granted

Single facer

AssigneeMitsubishi Heavy Industries Printing & Packaging Machinery, Ltd.

InventorTakashi Nitta

Life of this patent

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Abstract

Reconditioning is performed such that the curvature of the arcuate surface of the crest on the upper corrugating roll is increased as compared before conditioning. Further, reconditioning is performed such that the curvature of the arcuate surface of the crest on the lower corrugating roll is increased as compared before conditioning. In this step, polishing is performed so as to maintain the maximum diameter of the crest on the upper corrugating roll as much as possible. Thereby, since the length of the inclined surface of the corrugating roll connecting between a crest and a trough of the upper and lower corrugating rolls and is reduced, the rate of the increase in the consumption of corrugated mediums of fluted corrugated mediums for double-faced corrugated cardboard sheets shaped by the upper and lower corrugating rolls and after reconditioning can be reduced.

Claims2

Dependent claims

A single facer comprising:

a first corrugating roll and a second corrugating roll being intermeshing with each other to shape a fluted corrugated medium, the first and second corrugating rolls each having a fluted outer periphery surface;
a gluing unit that applies glue to a flute tip of the fluted corrugated medium;
and
a pressure unit that presses the glued fluted corrugated medium and a back liner to bond them together, in conjunction with the first corrugating roll which is located at a corrugated medium feed direction downstream side,
wherein a curvature of an arcuate surface of a crest on the second corrugating roll, which is located at a corrugated medium feed direction upstream side, is configured to be greater than a curvature of an arcuate surface of a crest on the first corrugating roll, and
wherein the single facer is capable of manufacturing a double-faced corrugated cardboard sheet wherein a curvature of an arcuate surface of the fluted corrugated medium shaped in a joint portion with a front liner is greater than a curvature of an arcuate surface of the fluted corrugated medium shaped in a joint portion with the back liner protecting an article to be packaged.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/047,253Filed 7 Oct 2013 · division
Priority: JP 2010-04170126 Feb 2010
Published: US 2014/0034245 A16 Feb 2014
Granted: 19 Jul 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B31F 1/20
Mechanical deformation without removing material, e.g. in combination with laminating: corrugating; Corrugating combined with laminating to other…
B31F 1/26
Making webs in which the channel of each corrugation is transverse to the web feed: by interengaging toothed cylinders cylinder constructions
B31F 1/2895
Combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard: from corrugated webs having corrugations of…
B31F 1/32
Corrugating; Corrugating combined with laminating to other layers: corrugating already corrugated webs

Family

PCT/JP2010/072408Parent of this division · filed 13 Dec 2010
US 2014/0034245 A1Pre-grant publication · published 6 Feb 2014
Application13/389,853Parent of this division
US 8,806,753 B2Parent of this division
US 2012/0193033 A1Published application
US 9,393,754 B2This patent

From the US filing history. Foreign family members aren’t listed.