Vacuum timing device and method for producing the same

A method of producing a vacuum roll having an axis of rotation, a surface, and a surface longitudinal axis oriented in a direction substantially parallel to the axis of rotation, the method comprising the steps of:

• forming a first aperture in a vacuum member;
• forming a second aperture in the vacuum member;
• forming a vacuum line in the vacuum roll to establish fluid communication between the first and second apertures;
• coupling the vacuum member to the roll, the first and second apertures defining endpoints of a line that is skewed with respect to the surface longitudinal axis;
• and
• pivoting the vacuum member with respect to the surface longitudinal axis.

A vacuum roll assembly comprising:

• a roll having
• an axis of rotation;
• a surface;
• and
• a surface longitudinal axis oriented in a direction substantially parallel to the axis of rotation;
• a vacuum inlet;
• a vacuum line in fluid communication with the vacuum inlet and running along the roll;
• a vacuum member coupled to the roll;
• and
• a plurality of apertures defined in the vacuum member, in fluid communication with the vacuum line, and arranged in a line that is skewed with respect to the surface longitudinal axis, the plurality of apertures positioned with respect to the vacuum line to exert vacuum force only along a line skewed with respect to the surface longitudinal axis.

A method of producing a vacuum roll having an axis of rotation, a surface, and a surface longitudinal axis oriented in a direction substantially parallel to the axis of rotation, the method comprising the steps of:

• forming a first aperture in a vacuum member;
• forming a second aperture in the vacuum member;
• forming a vacuum line in the vacuum roll to establish fluid communication between the first and second apertures;
• and
• coupling the vacuum member to the roll, the first and second apertures defining endpoints of a line that is skewed with respect to the surface longitudinal axis, the first and second apertures positioned with respect to the vacuum line to exert vacuum force only along the line that is skewed with respect to the surface longitudinal axis.