Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2008-08-08
2011-10-25
Heitbrink, Jill (Department: 1743)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C425S207000, C425S587000
Reexamination Certificate
active
08043549
ABSTRACT:
An object is to reduce the axial dimension of an injection apparatus (31), facilitate the work of removing and inserting a screw (20), and improve the quality of molded products. The injection apparatus (31) comprises a heating cylinder (17), a screw (20), and a drive apparatus. The screw (20) includes a plasticizing portion which includes a body portion (45a) and a flight (53) projectingly formed on an outer circumferential surface of the body portion (45a). An index ε, which is obtained by dividing a value obtained by adding a screw stroke S and a screw effective length L together by the screw stroke S, satisfies the relation 2.0<ε<4.5. Even when the screw (20) is shortened, resin can be melted satisfactorily. Accordingly, the axial dimension of the injection apparatus (31) can be reduced.
REFERENCES:
patent: 3689184 (1972-09-01), Morse
patent: 5486327 (1996-01-01), Bemis et al.
patent: 2004/0228946 (2004-11-01), Yokoyama
patent: 2006/0197254 (2006-09-01), Onishi
patent: 102005020156 (2006-11-01), None
patent: 03-114720 (1991-05-01), None
patent: 5-261781 (1993-10-01), None
patent: 9-104056 (1997-04-01), None
patent: 9-314625 (1997-12-01), None
patent: 2004-291409 (2004-10-01), None
patent: 2005-131855 (2005-05-01), None
Goto Daisuke
Kamiya Munekatsu
Marumoto Hirotsugu
Takeuchi Shigeru
Washida Kohei
Heitbrink Jill
Spiral Logic Limited
Squire Sanders & Dempsey (US) LLP
Sumitomom Heavy Industries, Ltd.
LandOfFree
Injection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Injection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4280463