摘要:
A cutting and transport roller and a process for cutting the material webs which rest on the peripheral surface of the cutting and transport roller. In so doing, the material webs are severed with the aid of a cutter, which is located inside the shell of the cutting and transport roller in its resting position and which exhibits at least one knife, which during the cutting process of the material web reaches through an opening in the shell of the cutting and transport roller. The cutting motion, which is executed by the cutting surfaces of the knife during the cutting process, exhibits rotary components, whereby the rotational motions of the knife run about an axis of rotation, which is either parallel or at an acute angle to a perpendicular line on the plane which is defined by the radial (r) and axial (z) coordinates of the cutting and transport roller.
摘要:
Mechanism for cutting and distributing portions of sheet, particularly paper towels, comprising at least one cylinder (9) which can rotate around its axis in a supporting structure (1, 2, 3) and drag an end portion (8) of at least one sheet, inside said cylinder (9) being arranged one or more movable blades (28) which can protrude outside the cylinder (9) for cutting said end portion (8) of the sheet and are fixed to a shaft (26) suitable for rotating around an axis parallel to the longitudinal axis of the cylinder (9), wherein said shaft (26) is provided with at least a first member (30) which protrudes from one side of the cylinder (9) and can be rotated for an arc of a circumference by at least a second member (25) which shifts in a direction parallel to the longitudinal axis of the shaft (26) of the movable blades (28) and rotates around this axis, the rotational-translational motion of this second member (25) being synchronized with the rotatory motion of the cylinder (9). The present invention also relates to a paper towel dispenser comprising said mechanism.
摘要:
Disclosed is a rotary apparatus suitable for processing and working a web or sheet of materials such as plastic films, non-woven substrates, metal foils, paper, diaper cores and the like. Such apparatus includes counter-rotating anvil and tool rolls through which the web or sheet of material to be worked is fed. The tool roll includes at least one processing tool for working the web or sheet of material. The force of the tool on the web or sheet being worked is regulated by a force applied to the processing tool or the anvil surface of the anvil roll by a force-transmitting chamber which includes a fluid. The force applied is adjusted by altering the pressure of the fluid within the force-transmitting chamber.
摘要:
Mechanism for cutting and distributing portions of sheet, particularly paper towels, comprising at least one cylinder (9) which can rotate around its axis in a supporting structure (1, 2, 3) and drag an end portion (8) of at least one sheet, inside said cylinder (9) being arranged one or more movable blades (28) which can protrude outside the cylinder (9) for cutting said end portion (8) of the sheet and are fixed to a shaft (26) suitable for rotating around an axis parallel to the longitudinal axis of the cylinder (9), wherein said shaft (26) is provided with at least a first member (30) which protrudes from one side of the cylinder (9) and can be rotated for an arc of a circumference by at least a second member (25) which shifts in a direction parallel to the longitudinal axis of the shaft (26) of the movable blades (28) and rotates around this axis, the rotational-translational motion of this second member (25) being synchronized with the rotatory motion of the cylinder (9). The present invention also relates to a paper towel dispenser comprising said mechanism.
摘要:
The invention is an apparatus for cutting metal sheet having two rotatable drums, wherein the metal sheet passes between the drums for cutting. Each of the drums has a cutting blade moved into and out of cutting position by an axial actuator rod. The cutting blade includes two sets of rollers bearing against one of a pair of profiled side surfaces of the axial actuator rod.
摘要:
A rotatable perforating roll, for use in a continuously operating paper-converting rewinder, comprises at least a first plurality of pockets and a second plurality of pockets, each of the pockets designed to receive at least one perforating surface therein. The pockets are spaced apart from one another along the roll's outer circumference such that the pockets of the first plurality are equally spaced from one another at a first angular distance, and the pockets of the second plurality are equally spaced from one another at a second angular distance different from said first angular distance, but the pockets of the first plurality are unequally spaced from the pockets of the second plurality.
摘要:
A high speed rotary cutter includes a toothed counterwheel which has plural radial slots extending in the axial directions. First cutting blades are slidably received in the radial slots, each of which has a first cutting edge on its outer end. The first cutting edge is inclined to the line which is perpendicular to the advancing direction of the continuous corrugated strip. The movement of the first cutting blade between a projected and restored position thereof is controlled by a fixed cam which is located inside of the toothed counterwheel. The rotary cutter also includes a second cutting blade which has a second cutting edge on its outer end and is aligned to the first cutting blade so that the continuous corrugated strip is sheared at the crossing point of the first and second cutting blades. The first and the second cutting blades are biased to be engaged with each other for cutting the fin. The crossing point of the first and second cutting edges moves to the rotation of the toothed counterwheel, so that the continuous corrugated strip is sheared at whole width.
摘要:
A high speed rotary cutter includes a rotary drum rotated at varying speeds in synchronization with an associated toothed counterwheel. The rotary drum includes at least one reciprocative cutter blade which is movable radially of the drum into and out of engagement with at least one fixed cutter blade provided on the toothed counterwheel. The movement of the reciprocative cutter blade between a projected and a retracted position thereof is controlled by a rotary cam which is located inside of the rotary drum coaxially therewith and which is driven by a servomotor. The rotary cutter also includes a control unit which controls the servomotor in such a manner that, during a cutting mode, the rotary cam is rotated with its cam nose engaged with the reciprocative cutter blade to urge it into engagement with the fixed cutter blade to shear a continuous corrugated strip. During a non-cutting mode, the cam nose is angularly offset from the reciprocative cutter blade to retract the latter within the drum, thereby allowing the strip to pass through the rotary cutter without undergoing shearing.
摘要:
An apparatus and method for transferring a moving web from one windup core to another windup core comprising a plurality of rotatable core chucks mounted on a revolvable turret, means for leading said web towards said cores, and means for forming and severing a leader strip of web material for subsequent securing to an empty cylindrical windup core.
摘要:
The present invention relates to a process and device for continuously and rotatably cutting a sheet transversely with respect to its direction of advance, wherein the device comprises a rotor provided with cutters and mounted to rotate about an axis eccentric with respect to that of a squirrel cage surrounding this rotor, the bars of the cage defining slots for the passage of the cutters as far as a flexible belt resting on an anvil member and wound on cylinders for driving the sheet to be cut. This device is particularly applicable to the cutting of laths from a sheet of wood as said latter is peeled, for the manufacture of packing cases or the like.