PRE-INKED AUTOMATIC STAMP

This invention patent refers to a stamp endowed with internal and external constructive characteristics, which allow a total occultation of a pre-inked refill, inserted in longitudinal direction, enabling the use of all text plates, made according to various technologies.

The creation of this stamp aims at: a) Achieving a smaller size in terms of height, width and length in comparison to other existing stamps having the same dimensions of the text plate. b) Enabling the application of all forms, types, models and technologies for the manufacturing of the text plates . c) Obtaining a pre-inked refill that does not structurally deform or move with using time. d) Creation of a mechanism that allows an increase of the stamp lifetime, mainly with respect to the structural integrity of its mobile joints. e) Achieving an ergonomically optimized form, which uses only one key to activate the locking system, reducing the risk of non-intentional locking about at least 50%. f) Diminishing the total quantities of stamp parts.

Details of the objectives a) Contrary to the usual practices of the existing stamps,

the object has a gear that causes the printing table to spin around, inverting its printing face direction, thus, being differentiated for having a U-shape protrusion, which approximately in the middle of its displacement course touches and encloses a cylindrical leg, turning 180° around its leading axis. This mechanism enables a reduction of the breaking risk and diminishes the total volume of the stamp because of the possibility to compact its fixed structure. b) Differently as used in all existing automatic stamps, by removing the pre-inked refill, the outer appearance is not changed, in any operation or rest position, therefore, cuts to expose the part on the larger sides are not required like in other models. This characteristic also allows the use of the stamp with text-plates having technologies that waive the use of pre-inked refills, such as the technology known in the market as "Flash System" - pre-inked micro-porous rubber. c) A refill endowed with low-relief longitudinal and transversal trenches was developed. Besides, it has protruded structures on the edges, with the purpose of enabling the achievement of the desired level of structural rigidity and making it difficult the deformation of the pre-inked sheet (part comprising the pre-inked refill) . d) The use of the cylindrical leg with a larger diameter on the fixed body and the U-shape structure on the printing table makes it easy the forces acting on the axis of the printing table. This innovation leads to a reduction of the

breaking risk and increases the stamp lifetime. e) The part that allows the visualization of the stamp- identifying label also serves to shape the side form and enables the access and the occultation of the pre-inked refill. Another item was the locking mechanism, which, by using only one key to activate the locking system, reduces the risk of unintentional locking by at least 50%. f) The part that allows the visualization of the stamp- identifying label also serves to shape the side form and allows the access of the pre-inked refill to one of the smaller sides of the stamp.

For better understanding and visualization of the improvements achieved refer to the attached drawings, which are an integral part of this report. As one can infer from the drawings, Fig. 1 is an exploded view of the stamp object of this application. Fig. 2 shows the stamp with the pressed movable structure, reaching the maximum tracking and Fig 3 shows the gear of the stamp in a transversal cut . As per the drawings, this invention is made up of a part (3) that surrounds the upper part and one of the stamp sides, having a double function, such as identification visor and a cover for the inner part providing access to the refill

(pad) (5) . The refill (5), differently from ordinary stamps, is removed or inserted through the smaller side (longitudinal

direction), therefore, the moving structure (10) corresponding to the upper part of the stamp, should be pressed down; it is to be pressed up to the point of maximum tracking and the position is maintained by activating the lock (11), thus, by removing the part (3) one has access to the compartment (6) of the refill (5) . The refill (5) shows longitudinal and transversal low-relief trenches (14), as well as protruded structures (15) on the edges, to achieve the highest structural rigidity. Differently as applied in other stamps, a movable protection (10) hides the sides of the refill (5), in any operating or still position, therefore, not requiring cuts for exposing the part on the larger sides like the existing models use for removal or insertion of a refill similar to that refill (5) . Besides, the gear shown in Fig. 3, which causes the printing table to turn (4), inverting the direction of its printing face, is differentiated for having a U-shape protrusion (2), which approximately in the middle of its displacement way touches and encloses a cylindrical leg (8), turning 180° around its guiding axis (9). To return to its original position, the mechanism works on a similar manner, however, with inversion of the turning direction.

Thus, the movable part (10) of the pre-inked automatic stamp, when being pressed down, on the fixed part (13) causes the printing table (4) to slide in two guiding slots (12), one on each side, with two cylindrical legs (9),

which are fixed at two bearings located at the two opposite sides of the internal movable structure (10). In the middle of its displacement way, the printing table (4), which has a U-shape protrusion (2) on its bottom part, touches and encloses the cylindrical leg (8), causing the printing table to (4) turn 180° around its guiding axis (9), leaving the printing side to face the object to be printed. When returning to its original position, the mechanism acts on a similar manner, however, with inversion of the turning direction of the printing table (4), which will be with the printing face to be inked, in front of the refill (5) .