Primary mold of bottle body with handle and method of manufacturing bottle body with handle
AssigneeYoshino Kogyosho Co., Ltd.
InventorsMasao Akutsu, Akiho Ohta
Life of this patent
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Abstract
A primary molded bottle body 1 is blow molded with a bottomed and tubular lower body blank portion 9 suspended and continuously provided from the bottom of an upper body portion 2. The upper body portion 2 comprises a mouth tube 8 continuously provided through a shoulder portion 7 to the top end of a body wall 3 provided at the back portion thereof with a handle piece 4. Only the lower body blank portion 9 of primary molded bottle body 1 is blow molded by biaxial stretching into a lower body portion 9' to obtain a bottle body 1', so that a large-sized bottle body with a handle having the substantially equal strength to a biaxially stretched blow-molded bottle can be obtained.
Claims5
A bottle body with a handle formed in a primary mold, the bottle body comprising:
- a final upper body having a first wall thickness formed by a first blow molding operation, the final upper body comprising a shoulder portion in the shape of a truncated cone, a mouth tube integrally formed at a top of said shoulder portion, and a handle piece formed to bridge a backside of a cylindrical body wall;
- and
- a lower intermediate body blank portion formed by the first blow molding operation, said lower intermediate body blank portion being integrally formed at a bottom of said upper body and having a second wall thickness greater than said first wall thickness such that said lower intermediate body blank portion is suitable for subsequent additional blowing comprising biaxial stretch blow molding in a second blow operation to form a final configuration that is further stretched, said intermediate lower body blank portion having a bottom wall with a substantially hemi-spherical shape and diverging walls spreading outwardly toward said upper body and being shaped like a downwardly descending truncated cone having the hemi-spherical bottom wall at a point of truncation.
A method of manufacturing a molded bottle body with a blown integral handle, comprising:
- holding a primary molded bottle body in a first mold, said primary molded bottle body comprising an upper body that is a final product with an integral blown handle piece formed at a backside thereof during hollow molding, and a lower intermediate body blank portion integrally formed at a bottom of said upper body, said lower intermediate body blank portion having a thicker wall thickness than said upper body and being shaped like a cylinder with a bottom wall;
- and
- forming a final lower body by biaxial stretch blow molding said lower intermediate body blank portion while holding said upper body to prevent deformation thereof, said final lower body being shaped like a cylinder with a bottom wall and having a bottom portion with an annular leg portion at a bottom thereof.
A bottle body with an integral blown handle having an upper body with the handle formed and a lower body formed by the following process steps:
- holding a primary molded bottle body in a first mold, said primary molded bottle body comprising an upper body having a first wall thickness, said upper body being a final product with an integral blown handle piece formed at a backside thereof during hollow molding, and a lower intermediate body blank portion integrally formed at a bottom of said upper body, said lower intermediate body blank portion having a second wall thickness thicker than said first wall thickness, said lower intermediate body blank portion being shaped like a truncated cone with a bottom wall;
- and
- forming a final lower body by biaxial stretch blow molding said lower intermediate body blank portion while holding said upper body to prevent deformation thereof, said final lower body being shaped like a cylinder with a bottom wall and having a bottom portion with an annular leg portion at a bottom thereof.
Dependencies are inferred from the claim text.