A method and apparatus for screen printing a sequence of accurately registered images on a plurality of sheets or objects such as T-shirts use a primary register platen supported by a platen support table. The primary register platen may be moved in a horizontal plane relative to the platen support table, and repositionably secured thereto. Each object to be printed is temporarily fastened to separate secondary register platen, which may be quickly placed in a precisely repeatable overlying rela...

A ripper tip is removably attached to an end of a shank and has a point formed on each end thereof to facilitate reversal after one point has worn. Two pairs of apertures may be formed in a saddle mount portion of the ripper tip to align with respective bores formed in the shank to provide four adjusted positions therebetween.

A stenciling apparatus is provided with a screen formed as an endless band trained about and tensioned on four sprockets and driven by a shaft on which two of said sprockets are mounted. The sprockets are adjustable to vary the longitudinal and transversal tension of the screen. The objects to be printed on are brought into contact with the outer face of one flight of the screen band, while a scraper, in contact with the inner face of said flight, urges printing ink across the screen and onto th...

A silk screen printing machine which includes an inking blade having a concave trowel configuration for more efficiently applying ink to a silk screen stencil, and a pressure roller which cooperates with a paper-carrying drum to force ink through the stencil onto paper carried by the drum. A solvent feeding porous wiper, which continuously feeds a cleaning solvent by capillary action, bears against the periphery of the pressure roller to clean residual ink from this roller after it has pressed i...

A soil-working agricultural spring tooth having a flat, vertical upper end, and acute-angled tip at the lower end terminating in a vertical plane rearward of the upper end, a generally horizontal convoluted connector section depending from the upper end and extending rearwardly, and an arcuate working section of reversed curvature extending from the tip to a substantially horizontal transition section connecting to the connector section, the transition section being in the same general horizonta...

A safety trip mechanism for a plow which permits a plow to raise up, move rearwardly and pivot upon striking a buried object and which mechanism returns the plow to operative position after the object has been cleared.

A mechanism for loading and unloading the design cylinder in a rotogravure press unit including support bearings mounted in a pivotally supported housing in the side frames of the unit so as to be self aligning with the shaft of the design cylinder for freely supporting therebetween the design cylinder. A pair of supporting members having bifurcated heads for cradling therebetween the design cylinder, are pivotally secured to a pair of cranks mounted for pivotal movement adjacent the inside surf...

A plurality of transverse sets of front and rear gangs of hoe wheels are individually mounted on a tool bar by leaf springs which will transfer the weight of the tool bar to the gangs to provide down pressure and allow a high degree of flexibility between the sets of front and rear gangs and between the gangs of a single set so that the gangs can follow the ground contour and have excellent soil penetration.

A device for imprinting characters on extended lengths of tape and including a drive roll driven by the tape and a marking roll rotated by the drive roll such that the linear velocity at the periphery of the marking roll is the same as the linear velocity at the periphery at the drive roll. The tape is compressed against raised characters on the periphery of the marking roll by a backup roll and is similarly compressed against the drive roll by a pressure roll. Since the peripheries of the drive...

A fertilizer tank mounted on a two-wheeled frame with a tractor hitch includes the improvement of a hydraulically driven linkage for moving the tank forward and rearward on rails incorporated in the frame. The tank is moved on the frame to counterbalance implements that may be attached to the frame.