Abstract: Air filter cartridges are disclosed. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.

Abstract: A method for displaying indicia that is to be printed on a double-sided item on a computer screen. The double-sided item has first and second surfaces. The indicia has at least one print orientation when the indicia is printed on the item's first and second surfaces, and at least one view orientation when the indicia is displayed on the computer screen, which has a vertical orientation. The method includes providing information that characterizes the indicia's print orientation, using the information to compare the print orientation to the vertical orientation; and if, as a result of the comparison, the print orientation does not match the vertical orientation, adjusting the view orientation so the view orientation matches the vertical orientation while maintaining the indicia's print orientation when the indicia is printed on the item.

Abstract: A method for displaying indicia that is to be printed on a double-sided item on a computer screen. The double-sided item has first and second surfaces. The indicia has at least one print orientation when the indicia is printed on the item's first and second surfaces, and at least one view orientation when the indicia is displayed on the computer screen, which has a vertical orientation. The method includes providing information that characterizes the indicia's print orientation, using the information to compare the print orientation to the vertical orientation; and if, as a result of the comparison, the print orientation does not match the vertical orientation, adjusting the view orientation so the view orientation matches the vertical orientation while maintaining the indicia's print orientation when the indicia is printed on the item.

Abstract: A method for displaying indicia that is to be printed on a double-sided item on a computer screen. The double-sided item has first and second surfaces. The indicia has at least one print orientation when the indicia is printed on the item's first and second surfaces, and at least one view orientation when the indicia is displayed on the computer screen, which has a vertical orientation. The method includes providing information that characterizes the indicia's print orientation, using the information to compare the print orientation to the vertical orientation; and if, as a result of the comparison, the print orientation does not match the vertical orientation, adjusting the view orientation so the view orientation matches the vertical orientation while maintaining the indicia's print orientation when the indicia is printed on the item.

Abstract: A method for displaying indicia that is to be printed on a double-sided item on a computer screen. The double-sided item has first and second surfaces. The indicia has at least one print orientation when the indicia is printed on the item's first and second surfaces, and at least one view orientation when the indicia is displayed on the computer screen, which has a vertical orientation. The method includes providing information that characterizes the indicia's print orientation, using the information to compare the print orientation to the vertical orientation; and if, as a result of the comparison, the print orientation does not match the vertical orientation, adjusting the view orientation so the view orientation matches the vertical orientation while maintaining the indicia's print orientation when the indicia is printed on the item.

Abstract: Virtual shapes are defined that are referenced to one or more actual, printable sheets for printing. The virtual shapes are referenced to the actual sheet using a rotation and x-axis (left-to-right) and y-axis (top-down) coordinates. The coordinates are typically specified with respect to the top-left corner of the sheet. In one example, an end-user views a shape on a display, such as a computer monitor, a kiosk screen, the screen of a personal data assistant or other digital device. The shape may correspond, for example, to a complex label shape. After the user has input customized and/or personalized text, graphics or other information to be printed, the software may apply a rotation to the virtual shape as it is referenced onto the actual page to be printed. A product identification table may be provided in order to correlate proper rotations and/or coordinates to particular types of commercial sheets. A single virtual shape may be referenced multiple times onto a single sheet.