Patent ID: 7152447

Claim:
A roller type hemming apparatus comprising: a support member having a slide bore; a ball screw extending through said support member into said slide bore; a bearing engaged with said ball screw inside said slide bore; a guided slide member having a first portion received in said slide bore and a second portion extending outside of said slide bore; said slide member first portion having a receiver; a preloadable resilient member preloadable in said slide member receiver, said resilient member operably engaging said bearing; said bearing being disposed outside of said slide member receiver; a retaining plate having an opening therein, said retaining plate being mounted to said support member adjacent said slide bore for retaining said slide member first portion in said slide bore; and a hem roller rotatably mounted to the second portion of said slide member; whereby rotating said ball screw moves said bearing inside said slide bore, sliding said slide member to selectively compress and decompress said resilient member to establish a preload force and delimited range of deflection of said hem roller.