Method and apparatus for embossing the inside surface of a cup-shaped article

Embossing apparatus for impressing a design on a cylindrical article, comprising:

• a closed top cylindrical guide housing operating in a reciprocating manner to provide drive motion for the embossing apparatus;
• a cylindrical punch clamp holder slideable and captured within said cylindrical guide housing and driven by a different drive motion;
• a punch adapted to transfer an emboss design to the cylindrical article;
• mounting means for mounting said punch in axial alignment with said punch clamp holder;
• pressure sleeve means slideable and captured within said punch clamp holder so as to be telescopic therewith, and including a pressure sleeve through which said punch is slideable, said pressure sleeve being adapted to engage said article;
• means integral with said pressure sleeve means including an end which is extendable through the top of said punch clamp holder for engagement with said guide housing so that on a downward motion of the guide housing said engagement causes said pressure sleeve to forcefully move said article for impression of an emboss design, and so that on an upward motion of said guide housing said pressure sleeve means telescopically extends down from said guide housing until said capture causes said pressure sleeve means to be lifted by an upward movement of said punch clamp holder;
• first means for reciprocally moving said punch to a first position and then stopped prior to the impression of the design on the article, and then for moving said punch to a second position for withdrawal from the article;
• and
• second means for reciprocally moving said pressure sleeve means generally independent of the movement of said punch, said second means being effective to move said pressure sleeve and thereby forcefully move the article to effect a transfer of the impression to the article while said punch remains fixed, and being effective to remain stationary while said punch is withdrawn from the article.

A method for embossing the inside surface of a cup-shaped article, comprising the steps:

• spatially fixing a female die with a reduced diameter interior part;
• disposing a male part having an external embossing design stationary with respect to said reduced diameter part to form an annular opening having a dimension to form an interference fit of said article therebetween;
• said male part disposing step comprising lowering said male part to capture said article and move said article into a mouth of said die and to define said annular opening, and halting further downward movement of said male part once said annular opening is defined;
• and
• moving a sleeve part surrounding said punch downwardly to force said article through said annular opening to effect said embossing, said sleeve part remaining stationary thereafter for holding said article within said die while said male part is withdrawn from said article.

Embossing apparatus for impressing a design on a cup-shaped article, comprising:

• a cylindrical guide housing reciprocally moveable by a press slide, said guide housing having a bottom flanged part;
• a cylindrical punch clamp holder telescopically slideable within said guide housing, and having a top flanged part engageable with the bottom flanged part of said guide housing to arrest the telescopic movement therebetween;
• an emboss punch rotatably fixed to said punch clamp holder;
• a lever connected to a source of power for moving said punch clamp holder independently of said guide housing;
• and
• a cylindrical pressure sleeve captured within said punch clamp holder and adapted for slideable movement therein and around said emboss punch, said pressure sleeve being constructed to extend upwardly beyond said punch clamp holder in engagement with said press slide so that a downward movement thereof is effective to cause said pressure sleeve to force said article through an annular opening defined by a space between said emboss punch and an emboss die.