| CPC B41F 17/10 (2013.01) [B41M 5/382 (2013.01)] | 20 Claims |

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1. An apparatus comprising:
a rectangular frame having a first edge, a second edge, a third edge and a fourth edge;
a first rail and a second rail attached between the first edge and the second edge;
a first support bracket mounted on the first rail and the second rail, wherein the first support bracket is disposed between the first rail and the second rail; and
a first carriage comprising a first horizontal arm and a first vertical arm, wherein a first vertical arm bottom end is pivotally attached to the first support bracket and a first vertical arm top end is rigidly attached to the first horizontal arm.
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