B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 18/10 (2006.01) B65H 18/04 (2006.01)
Patent
CA 2235820
A thin ribbon cassette (16) is set on a tape winding device and its vertical-direction position is fixed by a position restricting member (18) provided on a back of a cover for an apparatus body. When the ribbon cassette (16) is thin in correspondence to a narrow width of an ink ribbon (15), a quantity of lowering of a ribbon winding top (5) engaged with a reel (16-1) of the cassette (16) is small. The biasing force of a clutch spring (7) compressed depending on the quantity of lowering of the ribbon winding top (5) is small, the force of a winding drive gear (6) which presses a clutch plate (4-1) through a felt (12) is small, the frictional force of the felt (12) is small, and the torque of the rotational shaft (4) is small. This torque is just suitable for winding an ink ribbon narrower long ink ribbon having a corresponding small tensile strength. When a thicker ink ribbon cassette (22) is set on the apparatus body, the quantity of lowering of the ribbon winding top (5) is large, and the biasing force of the clutch spring (7) is correspondingly large, so that the torque of the rotational shaft (4) is large in correspondence to a long wide ink ribbon (21). In alternative embodiments, the clutch plate (4-1) is replaced by a clutch plate (20-1) provided on a short rotational shaft (20), with a short ribbon winding top (34) being mounted on the shaft (20) to be axially slidable, but non-rotatable, relative to the shaft (20). A longer rotational shaft (14) is disposed within the shaft (20) and has an annular clutch plate (14-1) surrounding the clutch plate (20-1), a longer ribbon winding top (30) being mounted on the shaft (14) to be axially slidable, but non-rotatable, relative to the shaft (14) .
Une cassette de ruban fin (16) est placée sur un enrouleur de bande, son positionnement vertical étant déterminé par une butée (18) au verso du couvercle du corps de l'appareil. Dans le cas où la cassette à ruban (16) est fine pour une petite largeur de ruban encreur (15), la course d'enfoncement du dessus de l'enroulement de ruban (5) engagé dans une bobine (16-1) de cassette (16) est minime. La force d'action d'un ressort (7) d'embrayage comprimé en raison de la course d'enfoncement du dessus de l'enroulement de ruban (5) est faible, et la force d'un pignon (6) moteur d'enroulement agissant contre une plaque d'embrayage (4-1) au travers d'un feutre est faible, et le couple de l'axe de rotation (4) est petit. Ce couple suffit juste pour enrouler un long ruban encreur plus étroit caractérisé par une faible limite d'élasticité à la traction. Dans le cas où l'on place sur le corps de l'appareil une cassette (22) à ruban encreur plus épais, la course d'enfoncement du dessus de l'enroulement de ruban (5) est importante, et la force d'action du ressort d'embrayage est d'autant plus importante, ce qui fait que le couple de l'axe de rotation (4) plus important est adapté à un ruban encreur (21) long et large.
Mochizuki Yoshiaki
Shiraishi Yasushi
Casio Computer Co. Ltd.
Ridout & Maybee Llp
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