Patent Application
20120177464
Pursuant to International Patent Classification, the “CROWN TYPE ECCENTRIC MULTI DIE PRESS FOR MANUFACTURING REINFORCED CROWN CAPS AND EMBOSSED CROWN CAPS” corresponds to:
B21 MECHANICAL WORK OF METALS WITH NO SUBSTANTIAL RIPPING OF MATERIAL; CUTTING OF MATERIAL BY PUNCHING B21D MECHANICAL WORK OR TREATMENT OF METAL PLATES, METAL TUBES, BARS OR CONTOURS WITH NO SUBSTANTIAL RIPPING OF MATERIAL; CUTTING OF MATERIAL BY PUNCHING.
B21D 24/00 Combinations of presses or systems related to presses, for embedding.
In state of the art, the Multi die press is called “eccentric double effect press” and includes the following parts:
This system transports the printed tinplate sheets to the multi-dies which later on will be formed and made into crown caps.
They include the following parts:
Table(12): This element holds the lower dies secured by bolts.
Lower holder die(6): This element holds the “forming die”(7) (which forms the caps' corrugations) and the “lower cutting die”(5) which cuts the circumference (cut-edge) that will delimit the total development of the cap.
In the back part of the Table(12), is a “treader holding bottle”(9) held by a screw. This bottle holds the “treader”(8) whose purpose is to provide pressure during cutting and embedding.
Moreover, the “treader”(8) holds the “ejector shaft”(11) that expels the cap once it has been formed.
Upper cutting die(4): This element is found attached to the “upper holder die”(2) and works jointly with the “lower cutting die”(5) to form the cap.
The “upper cap forming punch”(3) moves in the internal part of the “Upper cutting die”(4), which embeds and determines the inside diameter of the cap. This cap forming punch is joined to the “holder stem of the upper cap forming”(1).
The lower die system remains steady while the Upper System is activated by the press crankshaft in an alternate movement. Once each cap is formed, the “ejector shaft”(11) will strip it mechanically and it will drop by the effect of gravity to a conveyor belt that will lead it to a defective cap separator device. The other caps will be transported to a container cart.
The processed sheet or “skeleton” is the residue—or wastage—of the printed sheet, which will be mechanically ejected into a container, once the caps corresponding to the sheet have been formed.
The invention is a mechanical device, die designed to specifically work in the currently state of the art CROWN press and to exclusively manufacture REINFORCED (LOW GAUGE) CROWN CAPS and EMBOSSED CROWN CAPS in general.
THE REINFORCED LOW GAUGE CROWN CAP is a new crown cap modality whose original rigidity allows reduction of the thickness of the currently state of the art Pry-Off and Twist Off crown caps, from 0.23 and 0.21 mm, respectively to 0.18-0.16 mm.
The REINFORCED LOW GAUGE CROWN CAP has currently a “patent pending” status in various countries around the world. Its inventor is the same person who invented this innovation. However, the REINFORCED LOW GAUGE CROWN CAP cannot be produced with the currently state of the art dies; therefore it requires this utility model for its manufacture.
This invention includes the following parts:
Table(12): This element holds the lower dies secured by bolts. Lower holder die(6): This element holds the “forming die”(7) (which forms the caps' corrugations) and the “lower cutting die”(5) which cuts the circumference that will delimit the total development of the cap. In the back part of the Table(12), we find the “treader holding bottle”(9) held by a screw. This bottle holds the “treader”(8) whose purpose is to provide pressure during cutting and embedding.
Moreover, the “treader”(8) holds the “lower cap forming punch”(13) and the “ejector shaft”(11) that expels the cap once it has been formed.
Upper cutting die(4): This element is attached to the “upper holder die”(2) and works jointly with the “lower cutter die”(5) to form the cap. The “upper cap forming punch”(3) moves in the internal part of the “upper cutting die”(4), which embeds and determines the inside diameter of the cap. This cap forming punch is attached to the “holder stem of the upper cap forming”(1).
The Lower Die System remains steady while the Upper System is activated by the press crankshaft in an alternate movement. Activation of the lower cap forming punch(13) with the upper cap forming punch(3) will then provide the cap with the characteristics typical of a Low Gauge Crown Cap, specifically, as a consequence of the concentric ring formed by the activation of these two cap forming punches, and which cannot be achieved if the currently state of the art die is used. For the embossed cap, the required relief will be provided by the previously described concept.
Once the low gauge crown cap or the EMBOSSED crown cap is formed, the “ejector shaft”(11) will strip it mechanically and it will drop by the effect of gravity to a conveyor belt that will lead it to a defective cap separator device. The other caps will be transported to a container cart.
The operation system is similar to that of the currently state of the art caps, mainly substituting various parts regarding the dies in the previously mentioned state of the art.
Modifications in the lower die system were made to provide the dies with a rigid support, necessary for the embedding of the ring characteristic to the Low Gauge reinforced crown cap and/or the embossed cap. The first modification refers to the inclusion of “lower centering device”(15) in the “lower holder die”(6) to restrict lateral tolerances characteristic of this system.
The currently state of the art “forming die”(7) and “lower cutting die”(5) have not been changed.
The “treader”(14) continues to fulfill its original function in the forming of the cap and at the same time holds the new “lower cap forming punch”(13), which together with the “upper cap forming punch”(3) will provide the concentric ring that shapes the characteristic reinforced Low Gauge crown cap and/or the characteristic relief of embossed crown caps in general. The mounting of these parts is similar to those of the currently state of the art dies in reference, which are placed inside the “treader holding bottle”(9).
On the other hand, the “ejector shaft”(11) has been modified in its lower part with a new “shock absorber system”,(16) to increase the cap expeller force. This is essential because the particular reinforcement ring or relief of the Low Gauge reinforced crown and/or embossed caps require an additional expulsion force that the current state of the art dies lack.
The “Upper Cap Forming Punch”(3) has also been modified regarding its curvature radius (plane) and the inverse cavity of the “Lower Cap forming Punch”, in order to obtain the embedding of the ring and/or the relief as the case may be. In the same manner, these cap forming punches can be also used to produce reinforced Low Gauge crown caps and embossed crown caps, in general.
Consequently, to manufacture reinforced Low Gauge Crown and/or embossed crown caps it is necessary to exclusively use the dies that includes this invention; these dies do not only and exclusively produce reinforced Low Gauge crown caps, but also embossed crown caps that are not necessarily Low Gauge, but have forms and/or logos, marks or badges whose purpose is not to provide the crown cap with reinforcement rings that will improve its structural performance, but only to give distinctiveness to the crown cap through a relief. We call this type of crown cap an “embossed crown cap”.
The embossed crown caps produced with this innovation, by being crown caps with the desired embossment but in relief or “embossed”, hinder an eventual falsification, as occurs with the currently state of the art crown caps. As a matter of fact, the currently state of the art crown caps acquire the distinctiveness of the company that offers the bottled product sealed with this crown cap, provided only by lithographic characters printed in the crown caps, which are frequently and very easily subject to illegal reproduction.
This innovation, by allowing the production of embossed crown caps by embossing the distinctive logo in relief and not in lithography, hinders the illegal reproduction of crown caps with unauthorized lithographic characters (falsified logos). Consequently, apart from avoiding the infraction to industrial property, it will be a very useful tool to prevent easy attempts against health that occur by the alteration of the contents of bottles that are frequently opened by unscrupulous people for their adulteration and are subsequently sealed with falsified crown caps.
It must be mentioned that the caps formed by this innovation, as we have already indicated, can be Reinforced (Low Gauge) Crown Caps or Crown Caps with relief embossment (embossed). Moreover, this invention can shape crown caps with both characteristics, that is, reinforced crown caps that are also embossed crown caps. This is so because both characteristics are complementary to each other.
The “Crown type eccentric multi die press for manufacturing reinforced and embossed crown caps” was specifically designed for mass production of reinforced Low Gauge crown caps that are incorporated in their respective press machines; design of a special press to hold this innovation was not required.
Moreover, the “Crown type eccentric multi die press for manufacturing reinforced and embossed crown caps” allows the manufacture of embossed crown caps, whose difference with the state of the art crown cap is that the latter has distinctive lithographic elements, of easy unauthorized reproduction, while the characteristic of the embossed crown cap is that its distinctive elements are embossed in relief on the crown cap, which hinders its illegal reproduction.
