Abstract: A rolling device of utilizing flexible material, such as a soft piece, a tap, a plastic piece, a cardboard, a metal sheet, to roll a flexible thin component, such as a soft piece, a paper, a plastic piece, a metal sheet, a cloth, so as to inject the flexible thin component into the rolling device or to eject the flexible thin component out of the rolling device.

Abstract: A pen with a paper roll is disclosed. A volute spring surrounded by the paper roll is fastened on a reel. A volute spring pushes the paper roll for keeping the outer surface of the paper roll to touch a barrel which contains the paper roll. The surface of barrel has the prominent lines for decreasing the friction between the outer surface of the paper roll and the inner surface of the barrel. The barrel is configured in an outer casing of a pen, and the barrel and the outer casing have a first opening and a second opening separately. The first opening and the second opening is correspondent to each other. One side of the second opening is an inward bevel edge which extends into the first opening and interferes with the outer tier of the paper roll. The outer end of the paper roll can be pushed out of the first opening and the second opening against the inward bevel edge.

Abstract: The present invention provides an injection molding technique for embedding a volute flexible material into reel in order to produce a rotation assembly. At first, a volute component, a first mold, and a second mold are provided. Next, the volute component is inserted into a corresponding volute fissure of the second mold. In a following step, these two molds are combined together in order to align a first end cavity of the first mold with a second cavity of the second mold. Therefore, a reel component of the rotation assembly is blocked by injecting material into the space composed by the first end cavity and the second cavity through an injection hole. At last, the rotation assembly is retrieved by decomposition of the first and second molds.

Abstract: A pen with a paper roll is disclosed. A volute spring surrounded by the paper roll is fastened on a reel. A volute spring pushes the paper roll for keeping the outer surface of the paper roll to touch a barrel which contains the paper roll. The surface of barrel has the prominent lines for decreasing the friction between the outer surface of the paper roll and the inner surface of the barrel. The barrel is configured in an outer casing of a pen, and the barrel and the outer casing have a first opening and a second opening separately. The first opening and the second opening is correspondent to each other. One side of the second opening is an inward bevel edge which extends into the first opening and interferes with the outer tier of the paper roll. The outer end of the paper roll can be pushed out of the first opening and the second opening against the inward bevel edge.

Abstract: A paper dispenser includes a reel tube having a lateral opening and a cavity, a central shaft disposed inside the cavity, a set of spring for shaft with one end inserted and fixed on the central shaft while the other end is connected with the beginning end of the reel. The spring set for shaft rotates in accordance with the central shaft and can release paper through the lateral opening or furl paper back to the cavity. An annular leafspring set for the paper roll is installed between the reel tube and the spring set for shaft. When paper is released, the stretching force of the spring set for shaft along radial direction pulls the paper roll out. When the paper roll is curled back to the tube, the compressing force of the spring set for shaft along radial direction provides part of the cavity for receiving paper.

Abstract: A paper dispenser includes a reel tube having a lateral opening and a cavity, a central shaft disposed inside the cavity, a set of spring for shaft with one end inserted and fixed on the central shaft while the other end is connected with the beginning end of the reel. The spring set for shaft rotates in accordance with the central shaft and can release paper through the lateral opening or furl paper back to the cavity. An annular leafspring set for the paper roll is installed between the reel tube and the spring set for shaft. When paper is released, the stretching force of the spring set for shaft along radial direction pulls the paper roll out. When the paper roll is curled back to the tube, the compressing force of the spring set for shaft along radial direction provides part of the cavity for receiving paper.