Abstract: A coating apparatus is described for coating the surface of a center or core of chewing gum with a sugarcoated layer. The apparatus includes a cylindrical fixed tub having a bottom and an inner fixed circumferential wall. A rotating plate is mounted on the bottom of the fixed tub so as to be coaxial with the fixed tub. The surfaces of the rotating plate and the fixed tub are determined to allow the smooth transfer of the gum centers from the rotating plate to the inner fixed circumferential wall of the fixed tub. The inner fixed circumferential wall of the fixed tub is configured with ridges so as to reduce the tendency of the gum centers to adhere to the wall and to increase the coating area and the drying area of the gum centers.

Abstract: A centrifugal barrel finishing apparatus centrifugally polishing, grinding or otherwise finishing workpieces includes a revolving member mounted on a first rotatable shaft so as to be rotated with the first shaft, a barrel mounted to be rotated about a second shaft, the barrel having both axial ends, a stopper mounted on the second shaft so as to be abutted against one axial end side of the barrel, and a fluid pressure cylinder including a piston and mounted on the second shaft so that the piston pushes the other axial end side of the barrel so that the barrel is held between the stopper and the cylinder.

Abstract: A barrel container for a dry barrel polishing machine includes a container body made of an elastic material and having an access opening through which polishing chips and workpieces are put into the container body. The container body has a wall with a through hole providing communication between an exterior and an interior of the container body, and a lid opening and closing the access opening.

Abstract: A spiral-flow barrel finishing machine having a cylindrical stationary barrel and a rotary barrel closed at the bottom thereof includes an escape layer or air layer provided between an inner side of a metallic wall of the stationary barrel and an outer side of a lining layer being formed thereon for allowing for outward thermal expansion of the lining layer. The escape layer is provided over a specific area between the inner side of the metallic wall of the stationary barrel and the outer side of the lining layer formed thereon.

Abstract: A centrifugal barrel finishing apparatus centrifugally polishing, grinding or otherwise finishing workpieces includes a revolving member mounted on a first rotatable shaft so as to be rotated with the first shaft, a barrel mounted to be rotated about a second shaft, the barrel having both axial ends, a stopper mounted on the second shaft so as to be abutted against one axial end side of the barrel, and a fluid pressure cylinder including a piston and mounted on the second shaft so that the piston pushes the other axial end side of the barrel so that the barrel is held between the stopper and the cylinder.

Abstract: A spiral-flow barrel finishing machine having a cylindrical stationary barrel and a rotary barrel closed at the bottom thereof includes an escape layer or air layer provided between an inner side of a metallic wall of the stationary barrel and an outer side of a lining layer being formed thereon for allowing for outward thermal expansion of the lining layer. The escape layer is provided over a specific area between the inner side of the metallic wall of the stationary barrel and the outer side of the lining layer formed thereon.

Abstract: A spiral-flow barrel finishing machine having a cylindrical stationary barrel and a rotary barrel closed at the bottom thereof includes an escape layer or air layer is provided between the inner side of the metallic wall of the stationary barrel and the outer side of a lining layer being formed thereon and for allowing for the outwardly thermal expansion of the lining layer.

Abstract: A barrel container for a dry barrel polishing machine includes a container body made of an elastic material and having an access opening through which polishing chips and workpieces are put into the container body, the container body having a wall with a through hole providing communication between an exterior and an interior of the container body, and a lid opening and closing the access opening.

Abstract: This invention relates to a spiral-flow barrel finishing machine having a cylindrical stationary metallic barrel equipped with a lining layer at a lower inside portion. A rotating barrel is equipped with a lining layer on a metallic rotational body and is loosely engaged with the lower part inside of the cylindrical stationary barrel so as to rotate freely. A constant clearance is kept between the inner wall of the stationary barrel and the outer wall of the rotating barrel, regardless of the temperature change and the moisture content change. A measure to allow for thermal expansion having a specific vertical width, properly corresponding to the vertical width of the clearance, is circularly arranged between the inner wall of the metallic stationary barrel and the outer wall of the lining layer on the metallic stationary barrel. This makes an allowance for thermal expansion of the lining layer on the stationary barrel toward wall side of the metallic stationary barrel.