Printing – Special article machines
Patent
1997-10-27
1998-10-20
Burr, Edgar
Printing
Special article machines
101 381, 1013491, B41F 1700
Patent
active
058231064
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a printing apparatus for container having a circular cross section. The printing apparatus comprises transferring ink on a cylindrical container having a constricted portion, particularly a cylindrical container having a shoulder portion, a circular sectional constricted portion having a shorter radius than the radius of the shoulder portion and a barrel portion having the same diameter as the shoulder portion.
BACKGROUND ART
The present applicant discloses in the Japanese Patent Application Publication No. 63-37707 a technique relating to simultaneously print in multiple colors as shown in FIG. 6 on a shoulder portion 4, a constricted portion 5 and a barrel portion 6 of a container 1 having a cap 2, a tapered mouth portion 3, the cylindrical shoulder portion 4, the constricted portion 5 of a circular cross section, and the barrel portion 6 which has the same diameter as the diameter of the shoulder portion.
This well known technique above described is structured so that a transfer surface member for the constricted portion can be protruded from a flat surface of a transfer drum with cams and springs, but the structure is very complicated.
It is an object of the present invention to provide a simultaneous printing apparatus of a simple structure for circular cross sectional containers which simultaneously prints in multiple colors on the container having the constricted portion whose surface is recessed from the surface of the barrel portion.
DISCLOSURE OF THE INVENTION
In a printing apparatus for circular sectional containers of the present invention, the printing is performed by transferring ink on a circular cross sectional cylindrical container having a constricted portion recessed inside along a direction of radius thereof, and the apparatus is provided with imprint rolls for each print portion having a different length of radius of the circular cross sectional container, and the imprint rolls are placed around the transfer drum in decreasing order in length of the radius of each corresponding portion for being printed along the direction of rotation of the transfer drum and the imprint roll for a portion having the longest length of radius of the container is placed at the most upstream in the direction of rotation of the transfer drum. The transfer drum is provided with fixed transfer surface members and movable transfer surface members. The movable transferring surface members are biased along a protruding direction by a resilient means.
For the resilient means, it is preferable to use, for instance, a spring.
In performing the present invention, when the shoulder portion, the barrel portion, and the constricted portion of the container having a circular cross section are different in each radial length, a transfer surface member for a portion of the circular sectional container having the longest radial length is treated as a fixed transfer surface member and other transfer surface members are treated as movable transfer surface members. In such cases, a protruding length for each movable surface member is adjusted by a resilient means, for instance, a spring. And the imprint rolls may be arranged in decreasing order of radius of each corresponding container portion so that ink is first transferred by an imprint roll for a transfer surface member for the container portion having the longest radial length.
It is preferable to form a protruded portion of the movable transfer surface member according to the shape of a corresponding portion of the container to be printed. Or the protruded portion is preferably shaped into a corner cut shape, a chamfered shape, a round corner shape, and a curved shape to prevent friction or interference with other portions on pressing with the imprint roll.
It is also preferable to be composed of an elastic material such as rubber for a surface portion of the fixed transfer surface member and the movable transfer surface member which contact with the container.
In a printing apparatus for a circular cross sectiona
REFERENCES:
patent: 435459 (1890-09-01), Berge
patent: 3221643 (1965-12-01), Rudolph et al.
patent: 3486442 (1969-12-01), Weber
patent: 3695176 (1972-10-01), Van Der Roer
patent: 4195566 (1980-04-01), Ozawa et al.
No Shinichiro
Watanabe Shinichiro
Burr Edgar
Ghatt Daue A.
Kabushiki Kaisha Yakul't Honsha
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