Abstract:
A cylinder sleeve, comprising a cylinder base sleeve consisting of cylindrical base layers arranged on top of each other, wherein said cylindrical base layers comprise one or more cylindrical polyurethane layers, wherein, independently of each other, at least 50 weight-% of each of said cylindrical polyurethane layers consist of polyurethane, and wherein the outermost cylindrical base layer is a cylindrical polyurethane layer; and one or more cylindrical layers, arranged on top of each other, wherein the innermost cylindrical layer is applied on the lateral surface of the cylinder base sleeve according to (a) and wherein the outermost layer of said one or more cylindrical layers is an adhesive layer for attaching a printing plate thereto, wherein the cylinder base sleeve according to (a) exhibits a carbon dioxide release coefficient RCO2 in the range of from 0 to 9.5 ppmv cm−3 d−1.
Abstract:
A printing plate unit to be demountably mounted on a printing plate mounting portion of a plate cylinder includes a printing plate and a printing plate coupling member. A length of the printing plate coupling member is larger than a width of the printing plate so that the printing plate coupling member is provided with a projecting portion projecting from the printing plate formed cylindrically in an axial direction. The printing plate unit is fitted to the printing plate mounting portion from one end side, and is demounted from the same one end side by gripping the projecting portion of the printing plate coupling member in a state both end portions of the printing plate formed into a cylindrical shape are coupled to each other by the printing plate coupling member.
Abstract:
An automatic handling and transport device for printing sleeves that includes a holding support (10) for printing sleeves (60) and a clamping carriage (20) connected to a motorized carriage (30) for a guided movement of the clamping carriage (20) between a gripping position for gripping sleeves (60) and a transport position, and a mobile handling unit (90) carrying the holding support (10). The holding support (10) has an inner core (12) attached to the mobile handling unit (90), and the holding support (10) is coupled to the core (12) or to the mobile handling unit (90) through adaptable support means (40), which provide a relative movement with respect to the core (12) to at least one of the two ends of the holding support (10). The connection of the clamping carriage (20) to the motorized carriage (30) comprises adaptable means (49) that allow a relative movement between the clamping carriage (20) and the motorized carriage (30).
Abstract:
The invention relates to a multi-layer, expandable sleeve (100) for a printing press cylinder and to a method of manufacturing this expandable sleeve. The sleeve has an inner layer (110) with a hard surface inner jacket (112), which defines a longitudinal axis (A) and the cavity for mounting on the cylinder, and an outer layer (130) with a cylindrical outer jacket (132) for carrying an outer shell, a printing plate or a separate outer sleeve, in particular. An intermediate layer (120), manufactured in the form of a lightweight honeycomb having honeycomb cells oriented radially (B) to the longitudinal axis (A), is provided between the inner jacket (112) and the outer jacket (132). The intermediate layer (120) includes at least one honeycomb layer (122-1, 122-2, 122-3, 122-4, 122-5) of fibre composite honeycomb consisting of fibre material embedded in a resin matrix that has been applied coaxially around the longitudinal axis (A).
Abstract:
A die unit fastened to an upper part of a stamping tool has a pressure plate, a stamping die, and a die-holding plate. In order to reduce the production cost, the pressure plate is arranged between the stamping die and the die-holding plate, wherein the pressure plate acts on a shoulder of the stamping die during a stamping stroke.
Abstract:
A system for mounting a flexographic printing plate to a cylinder includes a flexographic printing plate with a first alignment feature; a fixture with a second alignment feature which matches the first alignment feature; aligning the plate to the fixture using the first and second alignment features; mounting the cylinder in the fixture in alignment with the second alignment feature; and transferring the plate from the fixture to the cylinder maintaining registration.
Abstract:
A method and apparatus of securing and tensioning a printing form in an apparatus having a rotatable drum, comprising positioning a first portion of the printing form over a first set of pins that are coupled to a surface of the drum. The first portion of the printing form is then stamped onto the first set of pins thereby securing the first portion of the printing form to the drum. A rotatable member having a second set of pins is rotated so that the circumferential distance between the first set of pins and the second set of pins, is about equal to the length of the printing form. The drum is rotated until a second portion of the printing form is positioned above the second set of pins. The second portion of the printing form is then stamped onto the second set of pins.
Abstract:
A method and apparatus of securing and tensioning a printing form in an apparatus having a rotatable drum, comprising positioning a first portion of the printing form over a first set of pins that are coupled to a surface of the drum. The first portion of the printing form is then stamped onto the first set of pins thereby securing the first portion of the printing form to the drum. A rotatable member having a second set of pins is rotated so that the circumferential distance between the first set of pins and the second set of pins, is about equal to the length of the printing form. The drum is rotated until a second portion of the printing form is positioned above the second set of pins. The second portion of the printing form is then stamped onto the second set of pins.
Abstract:
A method of making a bridged blanket sleeve or bridged blanket mandrel for an offset printing machine or rotary printing machine includes forming an intermediate bridge section between an outermost single blanket layer and an innermost core layer or the outer surface of the mandrel. The intermediate section of the sleeve or mandrel so made can include one or more intermediate bridge layers. A bridged blanket sleeve or a bridged blanket mandrel for an offset printing machine or rotary printing machine includes an intermediate bridge section between an outermost single blanket layer and an innermost core layer or the outer surface of the mandrel. The intermediate section of the sleeve or mandrel can include one or more intermediate bridge layers.
Abstract:
A printing assembly includes a cylindrical sleeve having an inner surface and an outer surface. The inner surface defines a first channel and the outer surface defines a port fluidly connected to the first channel. The inner surface is configured for lateral movement along a nonporous surface in response to a first flow of pressurized air being directed into the first channel from the port. The inner surface is also configured to fixedly mate with the nonporous surface in response to removal of the flow.