An apparatus (100) for applying pressure to at least a portion of an edge surface (192), which bridges opposing faces (194) of a workpiece (190), comprises a frame (110), a first roller (120), a second roller (130), a rotation-control member (140), a first biasing member (150), and a second biasing member (160). The first roller (120) and the second roller (130) are coupled to the frame (110), are rotatable relative to the frame (110) about a first pivot axis (125), and are translationally fixed relative to the frame (110). The rotation-control member (140) is coupled to and is movable relative to the frame (110), controlling rotation of the first roller (120) and the second roller (130) relative to the frame (110). The first biasing member (150) is coupled to the first roller (120) and to the second roller (130) and is configured to operate in tension. The second biasing member (160) is positioned, in compression, between the frame (110) and the rotation-control member (140).

An apparatus (100) for applying pressure to at least a portion of an edge surface (192), which bridges opposing faces (194) of a workpiece (190), comprises a frame (110), a first roller (120), a second roller (130), a rotation-control member (140), a first biasing member (150), and a second biasing member (160). The first roller (120) and the second roller (130) are coupled to the frame (110), are rotatable relative to the frame (110) about a first pivot axis (125), and are translationally fixed relative to the frame (110). The rotation-control member (140) is coupled to and is movable relative to the frame (110), controlling rotation of the first roller (120) and the second roller (130) relative to the frame (110). The first biasing member (150) is coupled to the first roller (120) and to the second roller (130) and is configured to operate in tension. The second biasing member (160) is positioned, in compression, between the frame (110) and the rotation-control member (140).

An apparatus (100) for applying pressure to at least a portion of an edge surface (192), which bridges opposing faces (194) of a workpiece (190), comprises a frame (110), a first roller (120), a second roller (130), a rotation-control member (140), a first biasing member (150), and a second biasing member (160). The first roller (120) and the second roller (130) are coupled to the frame (110), are rotatable relative to the frame (110), and are translationally fixed relative to the frame (110). The rotation-control member (140) is movable relative to the frame (110), controlling rotation of the first roller (120) and the second roller (130) relative to the frame (110). The first biasing member (150) is configured to operate in compression along a second axis (102). The second biasing member (160) is positioned, in compression, between the frame (110) and the rotation-control member (140).

An apparatus (100) for applying pressure to at least a portion of an edge surface (192), which bridges opposing faces (194) of a workpiece (190), comprises a frame (110), a first roller (120), a second roller (130), a rotation-control member (140), a first biasing member (150), and a second biasing member (160). The first roller (120) and the second roller (130) are coupled to the frame (110), are rotatable relative to the frame (110), and are translationally fixed relative to the frame (110). The rotation-control member (140) is movable relative to the frame (110), controlling rotation of the first roller (120) and the second roller (130) relative to the frame (110). The first biasing member (150) is configured to operate in compression along a second axis (102). The second biasing member (160) is positioned, in compression, between the frame (110) and the rotation-control member (140).

Apparatus for compaction of containers, particularly beverage cans or tin cans from the foods sector, having two pressure rolls disposed at a parallel distance from one another, forming a gap, which rolls can rotate about their axis of rotation, in each instance, and rotate in opposite directions, wherein their mantle surface has multiple essentially strip-shaped elements, in each instance, which reach longitudinally from one face surface to the opposite face surface of the pressure rolls, wherein the strip-shaped elements of each pressure roll are strip-shaped active elements, which each diverge at a setting angle relative to a reference line that runs parallel to its axis of rotation in the mantle surface.

Apparatus for compaction of containers, particularly beverage cans or tin cans from the foods sector, having two pressure rolls disposed at a parallel distance from one another, forming a gap, which rolls can rotate about their axis of rotation, in each instance, and rotate in opposite directions, wherein their mantle surface has multiple essentially strip-shaped elements, in each instance, which reach longitudinally from one face surface to the opposite face surface of the pressure rolls, wherein the strip-shaped elements of each pressure roll are strip-shaped active elements, which each diverge at a setting angle relative to a reference line that runs parallel to its axis of rotation in the mantle surface.

In an embodiment of a core compressor, the core compressor includes a housing and a first pair of rollers and a second pair of rollers, both positioned in the housing. For each of the pair of rollers, an upper roller is positioned in vertical alignment relative to a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller of the first pair of rollers is located a first distance from the lower roller of the first pair of rollers. The upper roller of the second pair of rollers is located a second distance from the lower roller of the second pair of rollers. The first distance is greater than the second distance. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

In an embodiment of a core compressor, the core compressor includes a housing and a first pair of rollers and a second pair of rollers, both positioned in the housing. For each of the pair of rollers, an upper roller is positioned in vertical alignment relative to a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller of the first pair of rollers is located a first distance from the lower roller of the first pair of rollers. The upper roller of the second pair of rollers is located a second distance from the lower roller of the second pair of rollers. The first distance is greater than the second distance. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

A press cover has at least one polymer layer. The polymer layer includes, or is produced from, a polyurethane. The polyurethane has been formed from a prepolymer and a crosslinker. The prepolymer is a reaction product of phenylene 1,4-diisocyanate and at least one polyol. The crosslinker includes at least two components, namely, a first component having at least one diamine and a second component from the group of the carbonic esters.

A press cover has at least one polymer layer. The polymer layer includes, or is produced from, a polyurethane. The polyurethane has been formed from a prepolymer and a crosslinker. The prepolymer is a reaction product of phenylene 1,4-diisocyanate and at least one polyol. The crosslinker includes at least two components, namely, a first component having at least one diamine and a second component from the group of the carbonic esters.