Bottles and jars – Attachment or adjunct – Container support
Patent
1995-02-17
1996-07-16
Shoap, Allan N.
Bottles and jars
Attachment or adjunct
Container support
215398, 264516, B65D 2310
Patent
active
055359019
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a synthetic resin bottle with a handle comprising a handle and a bottle body which are separately molded and securely joined together, wherein the bottle body is formed by biaxial oriented blow molding, and its production method.
BACKGROUND ART
Japanese Published Unexamined Utility Model Laid Open No. 1988 (S63)-147429 disclosed a typical large-sized synthetic resin bottle with a handle in which a handle and a bottle body are separately molded and joined together.
The conventional bottle comprises as follows. The bottle body is formed by biaxial oriented blow molding. During the blow molding, a recessed portion is vertically formed in an arc-like configuration at a rear portion of the bottle body, an engaging convexity extending in a vertical direction is formed in an arc-like configuration at the center of the recessed portion, grooves of which both ends are closed are vertically formed in an arc like configuration on the both side surfaces of the engaging convexity.
The handle comprises a pair of front frames formed in an arc-like configuration and a grip portion connecting the upper ends and the lower ends of the front frames and is formed by injection molding. During the injection molding, engaging projections are formed at the both sides of the front frames.
By strongly pushing the handle from the rear side to the recessed portion of the bottle body, the engaging projections of the handle are constrained to pass over engaging portions disposed on the tip of the engaging convexity so that the handle is joined to the bottle body not to be detachable.
The conventional technique as mentioned above has problems as follows.
Since the joint of the handle to the bottle body requires strong putting force, an equipment used for joining the handle to the bottle body is required, thereby increasing the production cost.
The thickness of the bottle body is thin because the bottle body is formed by biaxial oriented blow molding. Therefore, when the strong putting force is applied to the body to join the handle thereto, there is a possibility of irregular deformation such as buckling deformation of the bottle body by this force, thereby sometime producing a rejected article when joining the handle.
Since the thickness of the bottle body is thin because the bottle body is formed by biaxial oriented blow molding, it is easy to produce an elastic deflection by the load on the portion engaged with the handle. The joining force between the bottle body and a handle becomes weak due to the elastic deflection so that there is a possibility that the handle comes off the bottle body.
The joint of the handle to the bottle body is maintained only by the engagement of the engaging projections to the grooves, which is provided by that the engaging projections are constrained to pass over the engaging portions, so that it is easy to produce looseness on the joint between the bottle body and the handle. This causes the unstable handling of the bottle on grasp of the handle.
The bottle body and the handle are separately molded and the bottle body is formed by biaxial oriented blow molding while the handle is formed by injection molding, thereby dimensional accuracies between the bottle body and the handle are quite different from each other. Therefore, it is easy to produce looseness on the joint between the bottle body and the handle.
It is impossible to form the engaging portion of the bottle body sharp because of the biaxial oriented blow molding so that it is difficult to provide a strong and stable joint of the handle to the bottle body.
Because the recessed portion of the bottle body for joining the handle has a structure curved inwardly, the recessed portion is less durable against the loading applied to the bottle body during using than the other portion of the bottle body.
In particular, in state of heat filling of the content, the bottle body is slightly softened by the heat of the content so that the durability against the loading is relatively greatly weakened. Thereby,
REFERENCES:
patent: 4363415 (1982-12-01), Rainville
patent: 4915241 (1990-04-01), Morimura et al.
patent: 4952133 (1990-08-01), Hasegawa et al.
patent: 5092476 (1992-03-01), Yasuda et al.
patent: 5167970 (1992-12-01), Yoshino et al.
patent: 5170533 (1992-12-01), Barry
Iizuka Takao
Ishii Hiroichi
Nozawa Takamitsu
Shimada Shinji
Shioiri Fujio
McDonald Christopher J.
Shoap Allan N.
Yoshino Kogyosho Co. Ltd.
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