US 5,295,434 AGranted

Process for making preliminarily printed formed body

AssigneeToyo Seikan Kaisha, Ltd.

InventorsAkihiko Machii, Atsuo Masaki, Yutaka Okunishi, Masao Ishinabe, Katsuhiro Imazu

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Abstract

Disclosed is a process for making a preliminarily printed formed body, which is characterized in that a halftone separated rectangular printing plate is once made from a rectangular original, halftone dots of each halftone-separated image are developed on an annular plane by picture element units finer than the halftone dots to deform the shapes of the dots, an annular halftone dot image is formed based on the changes of the shapes of the halftone dots and a halftone printing plate for the annular halftone dot image is made, and this halftone printing plate is applied to a blank to be formed. According to this process undesirable formation of a striped pattern caused by the elongating flow of the blank in the height direction and the contracting flow of the blank in the circumferential direction is prevented and a strange feeling is not given to the printed image, and a faithful printed image can be reproduced.

Claims7

Dependent claims

A process for making a printed draw-formed body having a printed image on the side wall portion thereof by draw-forming a preliminarily printed blank, which comprises:

separating an image on an original to be printed into halftone dots;
converting each of the halftone dots into an aggregate of picture element signals with rectangular coordinates, said elements being finer than the halftone dots;
developing the respective halftone dots by units of picture element signals onto an annular plane corresponding to the rectangular coordinates and transforming the halftone dots of the rectangular coordinates into deformed halftone dots on the annular plane comprising an aggregate of the picture element signals and having an expanded size in the circumferential direction and a contracted size in the radial direction so that a compression in the circumferential direction and an elongation in the radial direction due to the plastic flow of the blank caused at the draw-forming step are compensated;
making a printing halftone plate based on picture element signals with the transformed coordinates;
and
printing a blank using the obtained printing plate.

3 more elements

Dependencies are inferred from the claim text.