Abstract: A cotton gin bar including a roller assembly comprising a pair of discs rotatably arranged on the upper portion of the bar at the ginning point, the discs being operative on opposing sides of the bar for detaching lint from the seed. Each roller disc is provided with an annular rib and the gin bar is provided with an annular groove in which the rib is received, thereby defining a rotatable seal. The rotatable seal restricts the passage of small particles such as grit and lint which interfere with operation of the annular bearing on which the roller disc is mounted.

Abstract: A cotton ginning apparatus having a rotating ginning saw drum for engaging and holding the fibers of the seed cotton. A cylinder-like serrated kicker device extends across the path of the seed cotton being admitted for directing the seed cotton onto the ginning saw cylinder. The seed cotton, being held upon the ginning saw cylinder, is brought into engagement with a rotating spiral shaped gin roller. The gin roller has several spiral conveyor-like vanes which respectively have left and right-hand twists thereto that terminate midway between the outer ends thereof. The gin roller rotates with a greater surface velocity than that of the ginning saw cylinder, thus a lateral wiping action acts upon the seed cotton while the teeth of the ginning saw cylinder have a continuous pull on the fibers. The wiping action of the gin roller and the ever present pull on the fibers separates the seeds from the fiber, i.e., the removed seeds being carried inwardly to the center of the gin roller for discharge therefrom.