Systems and methods for etching complex patterns on an interior surface of a hollow object are disclosed. A method generally includes positioning a laser system within the hollow object with a focal point of the laser focused on the interior surface, and operating the laser system to form the complex pattern on the interior surface. Motion of the laser system and the hollow object is controlled by a motion control system configured to provide rotation and/or translation about a longitudinal axis of one or both of the hollow object and the laser system based on the complex pattern, and change a positional relationship between a reflector and a focusing lens of the laser system to accommodate a change in distance between the reflector and the interior surface of the hollow object.

A mount flange for mounting a cutting blade on a spindle is provided. The cutting blade has a central engaging hole and a peripheral cutting edge. The mount flange includes a cylindrical boss portion having a front portion adapted to be inserted into the engaging hole of the cutting blade and a rear portion whose inner circumferential surface is adapted to be engaged with the spindle, and a flange portion projecting radially outward from the rear portion of the boss portion and having a front surface functioning as a mounting surface adapted to come into abutment against one side surface of the cutting blade. An annular space is formed in the mount flange so as to surround the spindle and open to the inner circumferential surface of the boss portion, thereby suppressing rearward warpage of the outer circumference of the flange portion due to the rotation of the spindle.

A mount flange for mounting a cutting blade on a spindle is provided. The cutting blade has a central engaging hole and a peripheral cutting edge. The mount flange includes a cylindrical boss portion having a front portion adapted to be inserted into the engaging hole of the cutting blade and a rear portion whose inner circumferential surface is adapted to be engaged with the spindle, and a flange portion projecting radially outward from the rear portion of the boss portion and having a front surface functioning as a mounting surface adapted to come into abutment against one side surface of the cutting blade. An annular space is formed in the mount flange so as to surround the spindle and open to the inner circumferential surface of the boss portion, thereby suppressing rearward warpage of the outer circumference of the flange portion due to the rotation of the spindle.

A cutting head for a centrifugal cutting apparatus includes a rim structure; and a plurality of cutting stations which are mounted onto the rim structure, each of said cutting stations comprising a cutting element for cutting food products at a leading end of the cutting station and a product sliding surface between the leading end and a trailing end of the cutting station. The cutting stations are assembled adjacent one another onto the rim structure in such a way that a gap is present between each pair of adjacent cutting stations through which a product slice exits the cutting head upon being cut by one of the cutting elements. The product sliding surface has a first wall curvature on a front part and deviates from the first wall curvature on a rear part.

A blade assembly includes a blade support frame, and a plurality of V-shaped blades removably fastened to the blade support frame. The blade support frame has a food flow path extending downstream, and a plurality of blade mounts distributed around the food flow path. Each V-shaped blade has a first end portion connected to one of the blade mounts, a second end portion connected to another of the blade mounts, and an intermediate portion extending from the first end portion to the second end portion into the food flow path. At the first and second end portions of each V-shaped blade, a respective one of the blade mounts overlies both the upstream edge and the downstream edge of the V-shaped blade to inhibit the V-shaped blade from rotating when impacted by food.

An accessory for an oscillating power tool is provided. The accessory has a functional portion for cutting, sanding, or smoothing an object and an attachment portion that comprises a central opening with longitudinal and/or latitudinal openings extending radially from the central axis and a plurality of secondary openings. The secondary openings are also dispersed around the central axis. The accessory can fit, with no loss of functionality, oscillating power tools' connectors from multiple manufacturers.

An accessory for an oscillating power tool is provided. The accessory has a functional portion for cutting, sanding, or smoothing an object and an attachment portion that comprises a central opening with longitudinal and/or latitudinal openings extending radially from the central axis and a plurality of secondary openings. The secondary openings are also dispersed around the central axis. The accessory can fit, with no loss of functionality, oscillating power tools' connectors from multiple manufacturers.

A cartridge type electrode cutting apparatus is configured for detachably attaching to a main body. The electrode cutting apparatus includes an upper unit disposed above an electrode sheet, a lower unit disposed under the electrode sheet, and a guide portion configured to guide upward and downward movement of the upper unit. The upper unit includes an upper cutter configured to cut the electrode sheet, an upper holder to which the upper cutter is fixed, and an upper frame to which the upper holder is mounted. The lower unit includes a lower cutter configured to cut the electrode sheet and a lower frame to which the lower cutter is fixed.

A cartridge type electrode cutting apparatus is configured for detachably attaching to a main body. The electrode cutting apparatus includes an upper unit disposed above an electrode sheet, a lower unit disposed under the electrode sheet, and a guide portion configured to guide upward and downward movement of the upper unit. The upper unit includes an upper cutter configured to cut the electrode sheet, an upper holder to which the upper cutter is fixed, and an upper frame to which the upper holder is mounted. The lower unit includes a lower cutter configured to cut the electrode sheet and a lower frame to which the lower cutter is fixed.

A power transmission unit for electrode cutting apparatuses includes a lift block, an upper frame, a connection shaft, and an elastic member. The lift block includes a structure configured to be mounted to a main frame so as to be movable upwards and downwards. An upper cutter holder is mounted to the upper frame and is fixed to an upper cutter configured to cut an electrode sheet. The connection shaft is configured to connect the lift block and the upper frame to each other. The elastic member is located at the upper part of the connection shaft.