Patent ID: 9534873
Date: 2017-01-03
CPC Classifications: F41J

Claim:
1. A system comprising: a frame having a top, middle, and bottom section; a first roller section coupled to the frame and positioned at the top section of the frame; a second roller section coupled to the frame and positioned at the middle section of the frame; wherein at least one of the first and second roller sections includes an optical sensor; wherein the second roller section includes a motor housing positioned on a first side of the frame and including a motor, a battery, and a wireless receiver, and wherein the second roller section includes a spring-loaded housing positioned on a second side of the frame and including spring-loaded tube receiver; wherein the frame includes a first set of legs on the first side of the frame and a second set of legs on the second side of the frame; and wherein the motor housing includes slots that couple the first set of legs to each other, and wherein the spring-loaded housing includes slots that couple the second set of legs to each other.