The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11752714 B1

Date of Patent:

Sep. 12, 2023

Filed:

Jun. 10, 2020

Light guide film production device

Applicant:

Nanjing Bready Electronics Co., Ltd., Nanjing, CN;

Inventor:

Yong Liu, Nanjing, CN;

Assignee:

NANJING BREADY ELECTRONICS CO., LTD., Nanjing, CN;

Attorney:

HAUPTMAN HAM, LLP

Primary Examiner:

Seyed Masoud Malekzadeh

Int. Cl.

CPC ...

B29D 11/00 (2006.01); B29C 48/90 (2019.01); B65H 20/04 (2006.01); B29C 48/36 (2019.01); B29C 48/88 (2019.01); B29C 48/08 (2019.01); B29C 48/00 (2019.01);

U.S. Cl.

CPC ...

B29D 11/00663 (2013.01); B29C 48/0019 (2019.02); B29C 48/90 (2019.02); B65H 20/04 (2013.01); B29C 48/0022 (2019.02); B29C 48/08 (2019.02); B29C 48/36 (2019.02); B29C 48/919 (2019.02); B29C 48/9135 (2019.02); B65H 2301/5144 (2013.01);

Abstract

The present invention relates to the technical field of optical film production, and provides a light guide film production device, including a feeding unit, a fusion stirring unit, an extrusion molding unit, a cooling shaping unit, a guide leveling unit, a flattening unit, and a finished product winding unit. The cooling shaping unit is provided with a first water tank to perform heat exchange on an extruded light guide film for heat recovery, so that edge film pressing mechanisms press pressure blocks at the edge film positions using the memory effect of a memory alloy. Circulating water of the first water tank subjected to heat exchange is delivered to a second water tank disposed in the flattening unit, so that a first conveyor belt made of the memory alloy in a third drive device drives a second rolling roller set to rotate to realize secondary utilization of recovered heat. In the present invention, an air delivery mechanism with one airflow pipe to the cooling shaping unit, and the other airflow pipe to the flattening unit is further provided. According to the present invention, the heat of the light guide film production process is used to improve the quality of the light guide film and reduce the energy consumption of the light guide film production process.

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