US443093A - Wilhelm heidelmann - Google Patents

Description

(No Model.) 7 I W. HEIDELMANN DEVICE FOR FEEDING ENVELOPES.

No. 443,093. Patented Dec. 23, 1890.

FFICE.

\VILHELM HEIDELMANN, OF STUTTGART, GERMANY.

DEVICE FOR FEEDING ENVELOPES.

SPECIFICATION forming part of Letters Patent No. 443,093, dated December 23, 1890.

Application filed May 27,1890. Serial No. 358,315. (No model.)

To all whom it may concern.-

Be it known that I, WILHELM HEIDELMANN, a subject of the Emperor of Germany, residing at Stuttgart, Germany, have invented a new and useful Improvement in Devices for Feeding Envelopes, of which the following is a specification.

This invention relates to an apparatus for.

automatically lifting separate envelopes from a pile sufficiently for feeding the same to the grippers of a printing-press.

The object of my invention is to provide a device in which the envelopes are grasped at one of their longitudinal edges, near the side edges and under the open or sealed flap, and thus fed to the press for printing. By this arrangement the objection heretofore existing in envelope feeding devices for printingpresses, whereby when the open flap was caught under the sealed flap tliesaid devices would fail to operate and a stoppage of the machine was necessitated, is entirelyobviated.

In the apparatus heretofore employed for automatically feeding envelopes to printingpresses which are based on the idea of grasping the projecting sealing-flap of the envelope by a suitable arrangement and to draw it forth from the pile and feed it to the press it is a frequent occurrence that the flap adheres to the body of the envelope, or the point of the open flap becomes caught under that of the sealed flap, in both of which cases the sealing-flap is prevented from depending from the body, and it becomes impossible to grasp the same. Such envelopes must first be sepa rated from the pile by hand before the apparatus can continue in its operation, a considerable loss of time being the result. My apparatus entirely obviates this objection.

In the drawings accompanying this specification, Figures 1 and 2 represent, respectively, a sectional side elevation and a front elevation of an apparatus embodying my inven' tion, the parts being shown as occupying the position after an envelope has been lifted from the pile Figs. 3 and 4, similar views, the parts being shown in the position they occupy before an envelope is withdrawn. Figs. 5 and 6 illustrate details of the apparatus.

The feeding of the envelope to be printed to the press is performed in two steps and in such a manner that the same is by suitable devices first pushed or shoved out of the pile sufficiently to be then grasped by the grippers t' t of the press, to be farther carried along. My invention resides in this lifting out of each separate envelope from the pile, and will now be described in detail.

The envelopes, as shown, preferably rest upon an inclined table b, having an upwardlyextending wall (it, against which the lower edges of the envelopes rest; but any suitable holder for the envelopes will answer. The ejecting-slide c is arranged so as to reciprocate below the table I) and grasp the lowermost envelope, thus feeding them out of the holder or table, this ejecting-slide 0 having two prongs 0' extending along both sides of table I) and embracing the same and provided on both sides with the thin ejectingjaws (Z, which extend inwardly from the prongs c and above the table I), (see Figs. 1 and 3,) which are adjustable to correspondto the breadth of the envelopes held in their positions of adjustment by set-screws cl. These jaws have the formindicated in Fig. 6that is to say, they are beveled at their inner or forward sides, bent over to some extent, and sharpened to form a knife-edgeJ These knife-edges enter between the open flap or the sealed flap (the latter not adhering to the bodyforabout ten to fifteen millimeters from the side edges) and the body, according as it is desired to print along the one or the other longitudinal edge of the envelope, when in the forward movement of the ejecting-slide c, by means of the crank f, the jaws cl glide close to the back of the envelope. An envelope is thus advanced accurately and sufficiently to be grasped by the grippers i 11 of the press, and thus carried to the printing-point.

In order to prevent the accidental advance of a number of envelopes at once two fixed holders g are attached at the forward side of the apparatus, said holders being adjustable to correspond to the thickness of the envelopes, so that only one envelope can pass the same, the others being held back by the holders.

To diminish friction of the envelope to be 3. In an envelope-feeding device, the coinnination, with an enve1ope-holder,of a reciprocating ejeetingslide (1, provided with ejecting-jaws (I, having beveled inner corners bent upwardly and sharpened to form knife-edges, substantially as set; forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

\YILlI. IIICIDELMANN.

l'l'itnessesz AUGUST 1;. URANTZ, GUSTAV (moss.

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