Patent Application
20200189873
The present invention relates to the field of printers. More specifically, the present invention relates to a spindle assembly for a printer for accommodating paper rolls of different sizes, a printer with a printer mechanism having such a spindle assembly, and methods for accommodating different sized paper rolls in a printer.
Various types of printers that print on paper rolls may be used in different environments that may require different roll widths. For example, printers using paper rolls (e.g., rolls of paper, rolls of label stock, or the like) may include point-of-sale printers, label printers used for inventory control and food preparation, ATM printers, lottery ticket printers, gaming machine printers, and the like. Depending on the environment and application, different width media rolls may be used or required.
Prior art printers may be manufactured with a fixed bucket width for one of several standard-sized paper rolls. Alternatively, prior art printers may accommodate different size paper rolls by using removable screw mounted side guides, manually adjustable side guides, or manually adjustable spindle stops, all which require user adjustment typically using tools before changing roll size.
It would be advantageous to provide a spindle assembly that is easily adapted to accommodate paper rolls of different sizes.
The apparatus and methods of the present invention provide the foregoing and other advantages.
The present invention provides a spindle assembly for a printer for accommodating paper rolls of different sizes, a printer with a printer mechanism having such a spindle assembly, and methods for accommodating different sized paper rolls in a printer. An example embodiment of a spindle assembly in accordance with the present invention is capable of accommodating paper rolls of varying sizes. Such a spindle assembly comprises a spindle arm adapted to be connected to a printer mechanism. The spindle arm comprises a first flange surrounding an opening. A spindle is provided for accepting a first paper roll. A first end of the spindle is fixed in the opening of the spindle arm. The spindle comprises a second flange arranged at a second end of the spindle. A sleeve is provided which is adapted to slide over the spindle and attach to the spindle arm for accepting a second paper roll. The second paper roll has a different size than the first paper roll.
The second paper roll may have at least one of a different width and a different bore size than the first paper roll. Multiple sleeves of different sizes may be provided to accept additional paper rolls of correspondingly different widths and bore sizes.
The first flange and the second flange may each comprise one of a washer or an integral embossment.
A first end of the sleeve may engage with and be secured to the spindle arm. For example, the first end of the sleeve may comprise extensions that engage with slots or holes in the spindle arm. A second end of the sleeve may comprise a third flange. The third flange may comprise one of a washer or an integral embossment. The first end of the sleeve may fit over and surround the first flange.
The second paper roll may fit between the third flange and the spindle arm. The first paper roll may fit between the first flange and the second flange. The present invention also encompasses a printer with a printer mechanism having a spindle assembly capable of accommodating paper rolls of varying sizes. An example embodiment of such a printer comprises a printer mechanism and a spindle assembly for the printer for accommodating paper rolls of different sizes. The spindle assembly comprises a spindle arm adapted to be connected to the printer mechanism. The spindle arm comprises a first flange surrounding an opening. The spindle assembly also comprises a spindle for accepting a first paper roll, a first end of the spindle being fixed in the opening of the spindle arm. The spindle comprises a second flange arranged at a second end of the spindle. In addition, the spindle assembly comprises a sleeve adapted to slide over the spindle and attach to the spindle arm for accepting a second paper roll, where the second paper roll has a different size than the first paper roll.
The printer mechanism may also include additional features discussed above in connection with the various embodiments of the spindle assembly.
Methods for accommodating different sized paper rolls in a printer are also provided in accordance with the present invention. An example embodiment of such a method may comprise providing a spindle arm adapted to be connected to a printer mechanism, the spindle arm comprising a first flange surrounding an opening, providing a spindle for accepting a first paper roll, a first end of the spindle being fixed in the opening of the spindle arm, the spindle comprising a second flange arranged at a second end of the spindle, and providing a sleeve adapted to slide over the spindle and attach to the spindle arm for accepting a second paper roll, the second paper roll having a different size than the first paper roll.
The method may also include additional features discussed above in connection with the various embodiments of the spindle assembly.
The present invention will hereinafter be described in conjunction with the appended drawing figures, wherein like reference numerals denote like elements, and:
The ensuing detailed description provides exemplary embodiments only, and is not intended to limit the scope, applicability, or configuration of the invention. Rather, the ensuing detailed description of the exemplary embodiments will provide those skilled in the art with an enabling description for implementing an embodiment of the invention. It should be understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the invention as set forth in the appended claims.
The spindle assembly 10 comprises a spindle arm 12 adapted to be connected to a printer mechanism 32 (shown in
The second paper roll may have at least one of a different width and a different bore size than the first paper roll.
Multiple sleeves 22 of different sizes may be provided to accept additional paper rolls of correspondingly different widths and bore sizes and to center the different sized paper rolls in the spindle assembly.
A first end of the sleeve 22 may engage with and be secured to the spindle arm 12. For example, the first end of the sleeve 22 may comprise extensions 24 that engage with slots or holes 26 in the spindle arm 12. A second end of the sleeve 22 may comprise a third flange 28. The third flange 28 may comprise one of a washer or an integral embossment. The first end of the sleeve 22 may fit over and surround the first flange 14. In order to install the sleeve 22 on the spindle 18, the sleeve 22 may be slid over the second flange 20 and onto the spindle 18 such that the extensions 24 engage into the slots or holes 26 in the spindle arm 12, with the first end of the sleeve 22 surrounding the first flange 14. The extensions 24 may engage with the slots or holes 26 with a snap fit. The sleeve may be supported at its first end by the extensions 24 that engage with the slots or holes 26 and by the first flange 14, and supported on its second end by the second flange 20. The sleeve 22 can be removed from the spindle 18 simply by pulling the sleeve 22 such that the extensions disengage from the slot or hole 26 and sliding the sleeve 22 off of the spindle 18. Accordingly, in the example embodiment shown in the drawings, the sleeve 22 can be easily installed and removed by hand without tools.
Those skilled in the art will appreciate that there are other ways of attaching the sleeve 22 to the spindle arm 12, including but not limited to screwing the sleeve 22 to the spindle arm 12, a press fit between the second end of the sleeve 22 and the flange 20, or the like. The first flange 14 and the second flange 20 may each comprise one of a washer or an integral embossment. In an example embodiment where the second flange 20 comprises a washer, the second flange may be fixed to the spindle 18 via a bolt 21. The flanges may comprise either metal or plastic. For example, where the spindle arm comprises sheet metal, the first flange 14 may comprise an embossment of the sheet metal. Where the second flange 20 comprises a washer, the washer may be a plastic washer or a metal washer. The sleeve 22 may be made of either metal or plastic. Accordingly, where the third flange 28 is integral to the sleeve 22, it may be made of the same material as the sleeve itself (e.g., metal or plastic).
A paper low sensor 30 may be attached to the spindle arm 12 for sensing when the paper in the printer mechanism 32 is low or has run out.
The present invention also encompasses a printer having a spindle assembly capable of accommodating paper rolls of varying sizes. An example embodiment of such a printer is shown in
The first paper 34 roll may fit between the first flange 14 and the second flange 20, as shown for example in
The paper rolls 34, 36 may be placed on the spindle by sliding the paper rolls 34,36 over the ends of the spindle 18 or sleeve 22, respectively. The bore of the paper rolls 34, 36 is larger than the diameter of the flanges 20, 28, respectively. As the diameter of the spindle 18 is smaller than the diameter of the flange 20, once the paper roll 34 is slid onto the spindle 18 it is retained and centered on the spindle 18 between the flanges 14 and 20. Likewise, as the diameter of the sleeve 22 is smaller than the diameter of the third flange 28, once the paper roll 36 is slid onto the sleeve 22 it is retained and centered on the sleeve 22 between the wall 25 of the spindle arm 12 and the third flange 28.
The printer may also include additional features of the spindle assembly 10 discussed above in connection with
Methods for accommodating different sized paper rolls in a printer are also provided in accordance with the present invention. An example embodiment of such a method may comprise providing a spindle arm 12 adapted to be connected to a printer mechanism 32, the spindle arm 12 comprising a first flange 14 surrounding an opening 16, providing a spindle 18 for accepting a first paper roll, a first end of the spindle 18 being fixed in the opening 16 of the spindle arm 12, the spindle 18 comprising a second flange 20 arranged at a second end of the spindle, and providing a sleeve 22 adapted to slide over the spindle 18 and attach to the spindle arm 12 for accepting a second paper roll, the second paper roll having a different size than the first paper roll.
The method may also include additional features of the spindle assembly 10 discussed above in connection with
It should now be appreciated that the present invention provides advantageous methods and apparatus for accommodating paper rolls of varying sizes in a spindle assembly of a printer.
Although the invention has been described in connection with various illustrated embodiments, numerous modifications and adaptations may be made thereto without departing from the spirit and scope of the invention as set forth in the claims.
