Two-piece mechanical flag

In the combination of a generally linearly extending tube for receiving printed matter inserted therein and a signaling device for visually indicating to an observer who is remote from the tube that something has been inserted in the tube,

• the tube having an axis and being elongated with one end being open at least part of the time,
• the signaling device including a mounting member which extends in the same linear direction as the tube, said mounting member having one end rigidly fixed to said tube and the other end extending beyond the open end,
• a pivoting arm pivotally attached to said other end of said mounting member,
• said pivoting arm having the physical property of being able to pivot through an angle of 180.degree., except for the angle superintended by the thickness of the mounting member, when said mounting member is not attached to said tube,
• said pivoting arm being limited to pivoting through an angle not substantially greater than 90.degree. when said mounting member is attached to said tube, said 90.degree. angle being one where the pivoting arm extends generally parallel with the axis of the tube at one extreme and perpendicular to that axis in the other extreme,
• the pivoting arm including portions extending in two directions from its pivotal attachment to said mounting member, said directions being about 180.degree. apart, one said portion being pivotable from a location parallel with the axis of the tube to a location where it extends across the end of the tube which is open at least part of the time, the one portion of the pivoting arm extendable across the end of the tube being of such a width and length that anything being pushed into or pulled from the inside of the tube will engage said one portion to thereby pivot it about 90.degree. to orient it generally parallel with the axis,
• the other portion of the pivoting arm extending in its one extreme in a plane generally parallel with a plane defining the opening into said tube but beyond the tube surface a distance sufficient that it may easily be observed by said remote observer,
• said mounting member including a flat portion coated with adhesive at the end fixed to the tube,
• said mounting member further including an angled portion intermediate said flat portion and the pivot connection with the pivoting arm whereby the pivot is radially off-set from the point said mounting member is fixed to the tube.