US 6,877,973 B2Granted

Method and apparatus for manufacturing a lens sheet

AssigneeDai Nippon Printing Co., Ltd.

InventorsKazuyuki Matsumoto, Hitomu Watanabe

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Abstract

An apparatus for manufacturing a lens sheet comprises an application device, a substrate supply device, a pressing device and an irradiation device. The application device applies ionizing radiation curing type resin in the form of liquid on the upper surface of a forming die for a lens sheet to form an uncured resin body on the upper surface of the forming die. The substrate supply device places a substrate on the uncured resin body. The pressing device presses the substrate against the uncured resin body to flatten the uncured resin body, so as to form a uncured resin layer, while spreading the uncured resin body to an outside periphery of the forming die. The irradiation device irradiates ionizing radiation on the uncured resin layer through the substrate to cure the uncured resin layer.

Claims4

Dependent claims

An apparatus for manufacturing a lens sheet comprising;

an application device for applying ionizing radiation curing type resin in a form of liquid on an upper surface of a forming die for a lens sheet to form an uncured resin body on the upper surface of said forming die;
a substrate supply device for placing a substrate on said uncured resin body;
a pressing device for pressing said substrate against said uncured resin body to flatten said uncured resin body, so as to form a uncured resin layer, while spreading said uncured resin body to an outside periphery of said forming die;
an irradiation device for irradiating ionizing radiation on said uncured resin layer through said substrate to cure said uncured resin layer;
and
a circulation device for circulating the ionizing radiation curing type resin, when the application of the ionizing radiation curing type resin by said application device is temporarily stopped, while adjusting the temperature thereof.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/001,145Filed 24 Oct 2001
Priority: JP P2000-34353610 Nov 2000
Published: US 2002/0056930 A116 May 2002
Granted: 12 Apr 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B29C 43/36
Component parts, details or accessories; Auxiliary operations: moulds for making articles of definite length, i.e. discrete articles
B29C 33/36
Movable, e.g. to or from the moulding station: continuously movable in one direction, e.g. in a closed circuit
B29C 43/021
Of articles of definite length, i.e. discrete articles: characterised by the shape of the surface
B29D 11/00269
Production of simple or compound lenses: fresnel lenses