USRE12292E - Sheet feed or separator - Google Patents

Description

REIssUBi) NOV. 29, 1904.

. l FMJ r '6 I memo:

2 SHEETS-SHEET 1.

' BENIN! i J ,7 72M g: l 1.. HM

G. G. HARRIS. SHEET FEED OR SElARATOR APPLICATION I ILED:AUG. 23, 1904 REISSUEID ov. 29, 1904.

0. G. HARRIS. SHEET P221102 SEPARATOR.

APPLICATION FILED AUG. 23. 1904.

2 SHEETS-SHEET 2.

2 Bnorneg UN TE STATES CHARLES GRANT HARRIS,

PATENT OFFI Reissued November 2'9, recs.

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or NILES, onrdnssrenos TO THE HARRIS OHIO.

SHEET FEED OR SEPARATOR.

SPECIFICATION forming part of Reissued Letters Patent Nb; 12,292, dated November 29, 19 34..

Originalllo. 759,705, dated May 10, 1904. Application for'reissue filed August 23,

- ms, a resident ofNiles, in the county of Trum- I under different bull, State of Ohio, have invented certain new and useful Imprdvements in Sheet Feeds or Separators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such" as will enable others skilled in the art to which it appertains to make and use the same. f

The object of this invention is to improve the construction and enhance the utility of a sheet-feed embodying the invention patented.

to me in and by Letters Patent of the United States No. 651,307, dated June 5, 1900. It is well known in the art that there is always some slipping in feeding stock, varying conditions. If the paper should be unevenly fed up to the withdrawalrolls and not being advanced at a-speed equal rib or greater thanthe face speed of such rolls,

3 the latter have a tendency to tear the stock;

but as my present invention has demonstrated by giving to the paper an accelerated speedthat is, a speedgreater than that at which the withdrawal-rolls are rotatedthe paper is overfed, so to speak, between theseparator or feeder and thewithdrawai-rolls, with the result that the whole width of the paper is well passed between therolls'before they'exert a pull or tension thereon.

In thepractical application of the invention patented tome by the above-noted Letters Patent the positively-driven contact element is preferably composed of endless bands or While the upper cooperating frictionally-retarded contact element is in the form of a series of rolls. The positively-driven contactelement being in termittently operated ceases toact under its driving agency as asheet or other article is separated from its pile and fed forward to the a; withdrawal-rolls; but the sheet being taken up by the latter while still in contact with the two elements composing the separator its further forward movement under the action of the withdrawal-rolls causes the bands of theseparator to move with it under the pull or tension exerted on' the paper byrthe with:

of one end of of the operative parts upon the completion of.

1904. Serial 110. 221,904.

draival-rolls. By my present invention it is contemplated to so operate the endless bands of the positively-driven element as to avoid giving a sheet a hard blow in starting it for ward-that is to say, the bands are given a grad ually increasing mo vernent resulting also in overfeeding the stock to the withd raw alrolls, so that the forward edge is well between the latter before they can exert anytension thereon.

A further object of the present invention is toprovide auxiliary feeding means for large stock, so as to give additional forward impulse to the stock, and thereby prevent undue strain upon the mainlfeed.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying a plan view with is an elevation.

drawings. Figure 1 is parts broken away. Fig. 2 Fig. 3 is an enlarged -view the feeder, showing the position the forward positive action of the feeder. Fig. L is a'like view of :the same parts in positionat the commencement of the forward positive action; Fig. 5 is a diagrammatic view with he auxiliary feeder shown raised in dotted lines.

Referring to the drawings, 1; designates thd shaft, and 2 the rubber rolls, of the friction-' ally-retarded contact element of the feederor separator, the brake or retarder being indicated at 1. element is shown as composed of endless hands 3, engaging two rolls 4: and 5,'the latter at one end beingintermittently actuated by suit'' able mechanism, (indicated at 6.) This mechanism comprises a rackzbar 7, which drives roll 5 only when moved in one directiomsuch rack-bar being actuated by a constantly-r0 'tated cam 8, the different positions which are shown formed as to-irnpart to-the bandsfloomposing the positively-driven contact element. a graddaily-increasing motion, the-maximum speed.

of travel being at the completion of thepositive action of-the rack-bar-,-the bands so far i as being operated -by this mechanism is cow The positively-driven contact in Figs. 3 and4.. This cam is sov tion.

tension is exerted the latter and consists, 1

the time the bands is are positively Depending rack portions. are engaged by pinions removably secured, so

justed to accommodate stock of different sizes.

cerned remaining thereafter uhafi ected until the rack-bar is again brought into position to effect the gradually-increasing travel thereof.

The withdrawal-rollsareshown as composedof a series of upper rolls 9, mounted on a shaft 10 and engaging a lower roll-shaft 12, both of which are constantly operated inone direc It is by giving to. the stack the grad: ually-accelerated speed that it is overfed to the withdrawalu'olls and. w ll passed. between the latter before they exert any tension thereon. When such tension is I so exerted, the driving mechanism 6 has cdm pleted its action on the positively-driven contact, and,'as oc ours with most stock, a portion of the article fed being still between the two contacts when thereon by the withdrawairolls the bands ofthe positiveiy-drivencontact will he .further rotated by the Withd rawal of the article from between the two contacts.

13 designates an auxiliary feed, the purpose of which is tcrelieve the main feed from undue strain in feeding large'stock by giving to the stock an intermittent forward movement synchronously with the action of the .main feed. it is located immediately in rear of 'n brief, of a series of endless hands it, passed over t'worolls 15 and 16, the latter of which is-tlriven by a chain 17, which derives motion from one. of the shafts of the main feed. The rolls 'lh'and 16 are mounted in head -lolocks.18, which are mov abie vertically in side guides, shown as set in the ends of an opening in the table. These head-hicclrs are intermittently raised. iowcred;heing in their elevated nositions during actuated. of these head hloclrs shaft 20, havin its hearings in the A. crank (31. of this shaft is connected l: rod 2'2 to a lever 23, which lever is engages one end loy a cam 24 on a constantlyoperated shaft of the press. The action ct this can] on the le- 1 g on ver tends to intermittently raise and lower the head-blocks of the auxiliary feed-rolis, the cam serving to hold the auxiliary feed clevatedduring-the positive action on the feed-belts thereof. These belts are preferably arranged, as shown in Fig. iniermediate'plates 2:), spanning the opening hi the feed-table and serving to support the stock as against sagging. These plateszare that they may be ad- The same idea involved in the main feed of a-gradually-increasing speed imparted to the feed-belts is dhserved in the auxiliary feed,

with the result that I am enabled to handle stock of large proportions iliary feed tending to hold the stock well up against the. main fried:

Aspointed out in my before-noted patent,

1, separated by without difficulty, the additional forward-impulse by the auxpaper which is kept my sheet feed or separator is charcterized. by the fact that wh le the two enacting contacts will revolve in unison when in direct engagetact is in direct engagement will be separated from the others. inthe present invention thispositivelydriven contact element is given agradually-acceleratedspeed, asis aisc the auxiliary feed monnted in rear thereof.

In the arrangement shown the feed is eff fected from the bottom of a pile or stackof well up in place, with the forward edges of thc'sheets graduated or slightly advanced by the rotation of the endless bands 3, augmented by. the action of bands 14:.

I claim as my invention-- ii. A sheet feed or separator having'two coacting contacts, one being frictionall; retard ed but driven by the other onlywhen they are in direct engagement or with a single sheet interposed, such other contact being driven at a cohstantiy-increased speed, the maximum of which is coextensive with-the cessation thereof.

' 2. A sheet feed or separator having two eoacting contacts, one being frictionally retarded. but driven by the other only when they are in direct engagement or with a single sheet interposed, such other contact being intermittently driven at a uniform. graduallyincreasing speed.

3. Asheet feed or separator having two co-- acting contacts, one being frictionally retarded but driven by the other only when they are in direct engagement or with asingle sheet interposed, such other contact having a series of bands for coacting with the friction aily-retarded contact and/insane for intermittentl y operatingsaid bands at a uniform. gradually-increasing speed.

4:- A sheet feed or separator having two coacting contacts, one being frictionally retard ed but d 'iven by the other only whenthey are in direct engagement or with a single sheet interposed, such other contact having a series of bands for coacting with the frictionally-retarded contact, means for intermittently operating such bands at a uniform graduallyincreasing speed, and means for Withdrawing the stock from said contacts, such stock be ing overfed to such withdrawing means by the endless bands, such bands being free to rotate under the withdrawal of the stock by the withdrawal 11631155 as set forth.

5. The combination. With a sheetfeed or separator for feeding from a pile of stock, of

means for intermittently actuating the same speed, 'anauxiliary such feed or seen.

at a gradually-increasing feed mounted in rear of IIG rator and designed to engage such pile, and means for imparting to such auxiliary feed an intermittent gradually-increasing speed.

6. The combination with a sheet feed or separator for feeding from the bottom of a pile of stock, of means for intermittently actuating the same at a gradually-increasing speed, an auxiliary feed mounted in rear of such feed or separator and designed to engage the bottom of such pile, and means for imparting to such auxiliary feed an intermittent gradually-increasing speed, as set forth.

7 The combination with asheet feed or separator for feeding from the'bottom of a pile of stock, of means for intermittently actuat-' ing the same at a gradually-increasing speed,

an auxiliary feed mounted in rear of such feed or separator, means for intermittently mov' mg each auxiliary feed 1nt0 and out of con-' tact with the bottom of such pile, and means for imparting to such auxiliary feed, when in contact with said pile, a gradually-increasing speed, as set forth.

8. The combination with a sheet feed or separator for feeding from the bottom of a pile of stock, of means for intermittently actuating the same at a gradually-increasing speed,

an auxiliary feed mounted in rearof such feed or separator having a series of endless bands, means for intermittently moving such bands into and out of contact with the bottom of such pile, and actuating means connecting said auxiliary feed to the main feed or separator for imparting to the bands thereof a grad ually-increasing speed, such bands being so actuated when in contact with the bottom of said pile, as set forth. a

9. The combination with the feed or separator, of the table in rear thereof having a transverse opening therein, the heads movable in such opening, rolls mounted in such heads, endless bands engaging such rolls, said bands being normally beneath the plane of the table-top, means for intermittently raising and lowering saidheads, and means for actuating said bands when the heads are raised, as set forth.

10. The combination with the feed or separator, of the table in rear thereof having-a transverse opening therein, the heads movable in such opening, rolls mounted in such heads, endless bands engaging such rolls, said bands being normally beneath the plane of the table-top,"and arranged with intervening spaces, supportingplates extending across the openingin the table-top in line with the spaces between the bands, means for removably securing such plates to the table, means for intermittently raising and lowering said heads, and means for actuatingvsaid bands when the heads are held raised, as set forth. In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.

CHARLES GRANT HARRIS. Witnesses:

'J. R. GILBERT,

C. G. PnIToHARD,

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