DE178105C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The punching device on the known eyelet setting machines consists mainly of the upper punch and the lower punch, which, once you have punched the hole for the metal eyelet, your working position change so that the pair of punches for inserting the metal eyelets take their place can. But by the fact that each stamp is brought out of its working position for itself, is

ίο it curves or the like by reversing gear., provides very soon the inconvenience out that the stamps are no longer available are not always of course and in all circumstances at the same time and return exactly to their working position and centric to one another so that they only deficient or stop working at all and damage each other.

This deficiency is remedied by the innovation which forms the subject of the invention.

In the accompanying drawing 1 indicates Fig .. side view of a Eyeletting machine in section, "while Fig. 2, 3 and 4, the piercing apparatus α this Eyeletting machine represent. The piercing apparatus α consists of a two-armed slide, the upper arm carrying the punch b and its lower arm, which receives abutment C. In Fig. 1, this two-armed slide α has now been brought into such a position by curve d that the punch b sits exactly centrally under the eyelet inserting punch f . This is the working position of the punching device the material that is to be provided with an eyelet has been pushed onto the insert g , the eyelet setting punch f is moved down by the drive so far that it engages the punch b and presses it down into the hole abutment c , so that the At this moment, a curve movement brings the upper punch / punch back to its previous position rstempel b free again, goes upwards by spring force, and the entire slide α is pulled backwards by the spring h , while the perforated material remains on the insert g. After the eyelet punch i has removed an eyelet from the eyelet feed j , it starts moving upwards and at the same time the top eyelet punch comes down from above in order to insert the metal eyelet into the pre-punched material in a known manner. The two eyelet setting punches then return to their rest position, and at the same moment the slide α is pushed forward again through the curve d, as described, so that it is possible to punch and set again.

Patent claim:

Eyelet setting machine, characterized in that the punch pair (b, c) sits in a two-armed slide (h) and, together with this, releases the path for the pair of eyelet punches ff, i) .

1 sheet of drawings.