The present invention relates to a method of guiding a web with a shifting path of the web to a substantially constant centration point. It comprises the steps of providing a web with a shifting path of the web from a source of the web, measuring upstream of said centration point, the position and/or orientation of said web by a sensor arrangement, and guiding said web to said centration point in accordance to the measurement results. The present invention advantageously relates to operations in the manufacturing of absorbent articles such as unwinding web rolls that are wound in a shifted manner, in particular spirally wound web rolls, and removing web from containers of loose web material. The invention also relates to a device for the execution of the method.

The present invention relates to a method of guiding a web with a shifting path of the web to a substantially constant centration point. It comprises the steps of providing a web with a shifting path of the web from a source of the web, measuring upstream of said centration point, the position and/or orientation of said web by a sensor arrangement, and guiding said web to said centration point in accordance to the measurement results. The present invention advantageously relates to operations in the manufacturing of absorbent articles such as unwinding web rolls that are wound in a shifted manner, in particular spirally wound web rolls, and removing web from containers of loose web material. The invention also relates to a device for the execution of the method.

In a method for high speed printing of web-based media, a medium is pulled along a media transport path to a pulling transport mechanism. The orientation of the medium with respect to the media transport path is sensed and this orientation is compared to a reference orientation to detect an orientation error. If an orientation error is detected, one or more of the following steps is performed: adjusting a print job for an image to be printed on the web medium; adjusting the transport speed; emitting a communication signal; and stopping the pulling transport mechanism and the image forming unit. It is the insight of the inventor that productivity may be increased by allowing a “tight winding” printing system to start printing at relatively high speed and reduce this speed only when significantly large deviations in the orientation of the web are detected.

A rotary frame construction for web transport control devices, includes a carrier frame and a rotary frame in parallel therewith and carrying input and output rollers for a web and pivotably mounted on the carrier frame about a rotation center defined by control surfaces of one frame, the control surfaces scanned by cam followers on the other frame, the frames held in parallel alignment by support rollers on one frame and run surfaces on the other frame, the frames pivotally connected with one another by a drive system, the control surfaces constituted by three control curves formed at outer edges of a cam plate rigidly held on one frame, two of the control curves located on one side of the cam plate and the third on the opposite side of the cam plate, and the other frame has three cam followers respectively associated with one of the control curves.

A rotary frame construction for web transport control devices, includes a carrier frame and a rotary frame in parallel therewith and carrying input and output rollers for a web and pivotably mounted on the carrier frame about a rotation center defined by control surfaces of one frame, the control surfaces scanned by cam followers on the other frame, the frames held in parallel alignment by support rollers on one frame and run surfaces on the other frame, the frames pivotally connected with one another by a drive system, the control surfaces constituted by three control curves formed at outer edges of a cam plate rigidly held on one frame, two of the control curves located on one side of the cam plate and the third on the opposite side of the cam plate, and the other frame has three cam followers respectively associated with one of the control curves.

A web transport control device having a plurality of rotary frame units each of which includes a carrier frame, a rotary frame parallel thereto and carrying an input roller and an output roller for a material web, and pivotably supported on the carrier frame, a web guiding system arranged such that each of the material webs is fed to one of the input rollers, deflected thereat and then deflected again at the output roller, wherein the rotary frame units are nested one in the other such that web sections of the webs that extend between respective input and output rollers are parallel to one another and the spacing between two neighboring web sections is not larger than the sum of diameters of the input and output rollers, and the input rollers are offset relative to one another in the direction parallel to the web sections.

A web transport control device having a plurality of rotary frame units each of which includes a carrier frame, a rotary frame parallel thereto and carrying an input roller and an output roller for a material web, and pivotably supported on the carrier frame, a web guiding system arranged such that each of the material webs is fed to one of the input rollers, deflected thereat and then deflected again at the output roller, wherein the rotary frame units are nested one in the other such that web sections of the webs that extend between respective input and output rollers are parallel to one another and the spacing between two neighboring web sections is not larger than the sum of diameters of the input and output rollers, and the input rollers are offset relative to one another in the direction parallel to the web sections.

A printer includes a print head, a platen roller facing the print head, a driving source, a drive shaft connected to be driven to the driving source and rotatable about a rotation axis thereof, a platen gear connected to be driven to the platen roller, and a cassette mounting portion at which the print head and the drive shaft are disposed. A printing cassette including a to-be-printed tape, an input unit, and an output unit connected to be driven to the input unit is mountable on the cassette mounting portion in an axial direction of the rotation axis of the drive shaft. In a state where the printing cassette is mounted on the cassette mounting portion, the drive shaft is engaged with the input unit and the platen gear is engaged with the output unit.

According to examples, an apparatus may include a first feed element and a second feed element, in which a web is to be fed to the first feed element and from the first feed element to the second feed element. The apparatus may also include a controller that may determine whether the web exiting the second feed element is shifted from an intended position and based on a determination that the web is shifted from the intended position, cause the first feed element to be moved laterally a first distance and the second feed element to be moved laterally a second distance to compensate for the shift in the web exiting the second feed element.

According to examples, an apparatus may include a first feed element and a second feed element, in which a web is to be fed to the first feed element and from the first feed element to the second feed element. The apparatus may also include a controller that may determine whether the web exiting the second feed element is shifted from an intended position and based on a determination that the web is shifted from the intended position, cause the first feed element to be moved laterally a first distance and the second feed element to be moved laterally a second distance to compensate for the shift in the web exiting the second feed element.