Abstract: A machine for packaging products using a plastic film comprises: at least a fixed frame (TF) and at least a mobile counter-frame (CM), said counter-frame (CM) can be moved between a lifted rest position and a lowered working position wherein the film is clamped against said frame (TF), the movement of the mobile counter-frame (CM) is controlled by at least a fluid-dynamic actuator (25) which works between the machine frame (11) and said mobile counter-frame. According to the invention, a link (26) is positioned between said actuator (25) and said frame (11), said link is pivoted to the actuator (21) in (27) and is pivoted to the frame (11) in (28), said link (26) is further provided with a control device (30) connected to a sensor (32), in order to automatically stop the machine from working.

Abstract: There is provided a long-lasting phosphor activated by divalent europium and having a chemical composition RO.multidot.a(Al.sub.1-x Ga.sub.x).sub.2 O.sub.3 .multidot.b(Y.sub.1-y Sc.sub.y).sub.2 O.sub.3 .multidot.cB.sub.2 O.sub.3 .multidot.dEu.sup.2+ .multidot.eM.sup.n+ (where R is at least one selected from the group consisting of alkaline-earth metals including Ba, Sr, Ca and Mg and Zn, and M is at least one auxiliary activator selected from the group consisting of Nb, Zr, Bi, Mn, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) wherein a, b, c, d, e, x and y are within ranges of:0.3.ltoreq.a.ltoreq.8,0<b.ltoreq.0.2,0.001.ltoreq.c.ltoreq.0.2,0.001.ltoreq.d.ltoreq.0.3,0.001.ltoreq.e.ltoreq.0.3,0.ltoreq.x.ltoreq.1.0, and0.ltoreq.y.ltoreq.1.0.There is also provided a long-lasting phosphor activated by divalent europium and having a chemical composition RO.multidot.a(Al.sub.1-x Ga.sub.x).sub.2 O.sub.3 .multidot.b(Si.sub.1-y Ge.sub.y)O.sub.2 .multidot.cEu.sup.2+ .multidot.dM.sup.

Abstract: A device which can securely locate and easily adjust an angle of a drumstick of a drum is disclosed The device comprises a pedestal mounted on a pivot of the drum and a rotator engaged with the pedestal. The pedestal has a protrusion formed on a surface thereof. The rotator defines a plurality of recesses at a bottom thereof to respectively receive the protrusion of the pedestal according to requirements. In a preferred embodiment of the present invention, the rotator isometrically defines three recesses respectively corresponding to a rubber part, a wood part and a blanketing part of the drumstick.