Roll sheet holder and tape printer

The paper tape printer, comprising a rotary web press retainer storing part; the storing part of the container is a positioning concave part; the concave part of the horizontal avoiding looked is rectangular and with the predetermined depth. The positioning concave part is provided with a support inner bottom end with a groove in the horizontal avoiding is a rectangular are concave part. The packaging of the concave part is matched with the inlet the lower end of which is provided with a right angle from the locating maintaining to about extends inward a predetermined length paper respectively part. The paper distinguished part of formings with multiple is arranged in the l-shaped graph the sensor hole. On the surfaces of the concave part, a provided with a reinforcing device is l-shaped are corresponding of paper respectively sensor.