Abstract: A seaming mechanism for a machine of the type employed to secure a metallic head on a metallic drum by deforming and folding together adjacent, initially lapped, peripheral portions of the head and drum end; such mechanism embodying a pair of seaming rolls positioned for sequential movement into working engagement with such peripheral portions of the head and drum end, and corresponding seaming roll supporting arm units--actuated from a single, driven cam--operative to impart such sequential movement to said seaming rolls.

Abstract: A double-ended, drum seaming machine--which includes spaced, bed-supported columns carrying drum-engaging rotary chucks and drum seaming units--embodying a structural arrangement, in association with included stripper rods, which provides for pre-adjustment of the relative positions of the columns on the bed (according to drum length), and for predetermination of the limited-travel, working stroke of the individual columns between a retracted clearance position and an advanced position with the corresponding rotary chuck in drum head engagement.

Abstract: In the machine tool art, a dual cutter boring head which comprises a cylindrical body having side-by-side, tool-holding slides mounted diametrally thereon; the slides at their outer ends being fitted with cutters disposed exteriorly of the periphery of the body, and micro-adjustment mechanism within the confines of the body arranged to impart simultaneous, opposed, reversible motion to the slides whereby to precisely and equally adjust the slides and the cutters thereon outwardly or inwardly, selectively.

Abstract: A roll-type machine for forming a cylindrical metal body from an initially flat sheet of metal; such cylindrical body being for use in the manufacture of tanks for air, gas, or water. The machine includes a forming roll which is mounted and controlled in a manner to automatically retract from its normal, fixed working position immediately prior to completion of formation of the cylindrical metal body whereby to prevent otherwise attendant out-of-round deformation of said body.