US1986062A - Coating machine - Google Patents

Description

Jan. .1, 193 5.

R. J. HUTT ET AL COATING MACHINE 'ori inal Filed March 24, 1933.

2 sheets sheet 1 Rober i'lh wii TTORNEY Patented Jan. 1, 1 935 NITED- STATES PATENT OFFICE Robert J. min 2:213? mmouyn, N. Y.

Original application March 24, 1933, Serial N0.

, 662,492. Divided and this application September 26, 1933, Serial No. 690,998

4 Claims.

This invention relates to improved coating mechanismfor applying paste lines to a paper web or the like, which is drawn or fed along or -over a supporting frame and is particularly adaptable to packaging machines such as shown and described in an application filed by us March 24, 1933,"Ser. No. 662,492 and of which this forms a divisional application.

An object of this coating mechanism is to provide means for applying marginal lines of paste to a preferablyintermittently moving web of paper, in this case a base web, on which the individual contents of packages may beplaced, prior to receiving a printed transparent web thereon, said webs being subsequently sealed over the contents and cut into desired size packages simultaneously with the operation of mechanism for feeding said webs the distance of a dimen sion of one of said packages which operation is repeated over and over again to eject a complete package from the packaging machine at a the end of each feeding movement of said webs and contents.

Another object of the invention is to provide means for applying transverse or cross lines of adhesive to said paper web at each dwell in the intermittent feeding movement, said cross lines preferably extending from one marginal paste line to the other to form appropriate bare spaces employed.

suitable for depositing the contents of packages to be completed by co-operating mechanisms forming no part of the present invention later set forth in a general description. In the drawings: I Fig. 1 is a side elevation, with parts omitted, of a packaging machine of the type shcwn and described in the tified.

Fig. 1a. is a atic perspective of part of a paper web showing lines of adhesive .as applied by our invention.

of' the paste applying mechanism of the inven-' tion and detached from the packaging machine, the line of section being about on the line 22 of Fig. 3.

Fig. 3 is a plan view of the said paste apply ing' mechanism shown-in Fig. 2 and partly in section;

Fig. 4 is a-partial 44 of 3; and

Fig. 5 is a detail of one of a pair of racks Referring to the drawings in detail, the packaging machine, with which our invention may co-pending application above idencross section on the lineco-operate may include a suitable supporting frame 10, comprising top side bars 11, comer bars together.

At the rear end of the machine is a paste box 14, preferably mounted for forward and backward adjustment on supports at each side of the machine (but one being shown) and on the opposite bottom corners of the paste box 14, are appropriate lugs or projections 16, which rest each in a pocket 1'7 formed inopposite rack bars 18, which are slidable on the supports 15, and are operated by a cross-shaft 19, having gear parts to mesh with the rack bars 18,-

and said shaft is manually turned through a hand-wheel '21, fast thereto, for the purpose of adjustably sliding the paste-box 14, forwardly or backwardly on the frame 15, to change the tension or length of the horizontal pasted portion 22, of a comparatively heavy web or back-sheet 23, taken from a convenient source of supply 24 and drawn around an idle roller 25 upwardly and over a'platen-roller 26, then forwardly to printing, sealing and feeding devices hereafter described. 7

Marginal, and spaced cross lines of paste 27 and 28, respectively, are applied to the web 22' between intermittent feeding movements of the platen roll 26, in the following manner and by devices which will now be described:

A feed-roller 29, dips into the paste 30 in paste-box 14 and is mounted on a cross-shaft 31, having fixedon an extended end thereof, a pair of gears 32, and loosely mounted to rotate freely on this extended end is a third gear 33, carrying a spring-pressed dog 34, in contact with y the teeth of the outer of said fixed gears. Fig. 2 apartial vertical longitudinal section.

- Constantly in mesh with the free running gear 33, is a reciprocatingrack 35, operated by parts of the packaging machine.

said back-sheet 23, as it is drawn over en-roller 26.

the plat- In operation, the rack 35 when moving backand drags the dog or pawl 34 inoperatively over teeth of the outer one of the double gears 32, but when the said rack starts forwardly the dog 34 picks up the double-gears 32, and through the said gear train, including the inner of the double-gears 32, central gear 38, and platen-roller gear 37, the rollers 29, 39 and 26 are turned to permit a determined length of the web 23 to be drawn around and over the platen-roll 26, the length of the shift being the longitudinal dimension of adetermined package to be formed by the machine.

Attached to suitablebrackets 41, secured to the back of the paste-box 14 is a scraper-blade 42, extending longitudinally of the feed-roll 29 and in constant contact therewith, for arresting excessive paste carried upwardly on said roll which paste excess flows back into said pan 14.

A rock-shaft 43, is journalled in bearings 44, extending upwardly from the rear corners of the paste-box 14, front bearings 45 on this box serving as journals for the platen-roller 26,, as will be obvious.

The rock-shaft 43, has a gear 46 keyed thereto,

with which a gear-rack 47, secured to a crosshead 48, is meshed, and these parts are operatively held in mesh by a suitable two-part box casting 49, having opposite tubular bosses 50 loosely encompassing the said rock-shaft for permitting the gear-rack 47 and the attached cross-head 48 to have oscillating movements for the purpose presently set forth; the two-part box casting being held'together by a cross-bolt or screw 51, see Fig. 2.

Fixedly supported above the ends of the pastebox, 14, are angle plates 52, each having an arcuate slot 53, through which pins 54 extending from the ends of the cross-head 48 operate to guide and limit the movements of the said cross-.

The unit constituted by the said second friction gear 58, the spur gear 60 and the connecting hub 59, is free on the shaft extension 55, and to maintain the said friction gears and facing in proper operative contact for driving shaft 43, a charged spiral spring 61 is interposed between the spur. gear 60 and a collar 62, pinned to said shaft extension 55.

- The transverse paste lines 28, are applied to the back-web 23 in the following manner: A paste pad 63, (Fig. 2), is carried by the crosshead 48, and in the back stroke of the gear rack 35, when the web is at rest, the gears 60, 58, 56 and 46 on shaft 43, and the gear for drawing the cross-head 48 backwardly, causing the pins 54 to abut the rear ends of said arcuate slots 53 and support the cross-head and paste pad slightly above and over the axis of the feed roller 29 with the paste pad clear as at 64, to suspend the head in a manner to cause the pad 63 to be maintained clear of the feed roller 29; but at the beginning of its forward movement, to apply a transverse paste line on the web, said cross-head takes a sharp drop to permit contact of the paste pad 63 with the feed roller 29, to pick up a fresh supply of paste therefrom.

The supporting frame 15 of the paste box and its associated parts, may be of any desired construction to permit of horizontal adjustment, through the operation of the gear or gears 20 and gear rack or racks 18.

The reciprocable gear rack may be operated by a motor 65, through an electric circuit 66 (Fig. 1) controlled by a switch 67. The motor has a shaft 68, having a worm and gear driving connection 69 with a master gear 70, mounted to rotate with a cross shaft 200 on the ends of which are cranks 73 connected by crankrods 74 to opposite rock arms 75 carried on a feeding and sealing carriage on which a cutgear rack and Just prior to the pick-up action of the pawl or dog 34, on the gear 33, for operating the gear train32, 38, 37 torotate the paste transferring rollers 29 and 39 and to impart a web feeding rotary movement to said platen roll 26, thus this roll 26 performsadouble func tion, i. e. as a platen for taking the thrust of the pasting pad when applying a cross line of paste to the web, and for feeding the web forwardly from the supply roll 24 under slight tension produced by a suitable spring 24a fastened at one end on the supporting frame; its free end having frictional contact with the web supply roll 24, as shown in Fig. 1 of the drawmgs.

What we claim is:

1. In a coating machine, the combination with a supporting frame and a power member, of a paste box; gear means for adjusting its position; rotary means for feeding a web; rotary means for applying marginal paste lines to said web; angle plates mounted above said paste box' and having each an arcuate slot; a'reciprocatory cross-head having pins at its'ends which project into said slotsfor guiding and limiting the operative movements of said cross-head; a paste applying pad carried by the cross-head and means and connections operated by said power member for operating said rotary feeding means, the rotary, paste applying means and the cross-head, and said pad for applying transverse paste lines to said web.

2. In a coating machine, the combination with a frame and a reciprocable powered toothed rack; of a paste box; an intermittently driven platen roller journalled at its forward end; a reversible shaft mounted over the rear of said paste box; a gear fixed on said reversible shaft;

a housing around said gear; a rack bar operatively connected with said gear and extending horizontally through said casing; coacting friction disks, one loose, one fixed on said shaft; a spring for forcing the disks into driving contact; a gear on the loose disk and engaging the powered toothed rack; and means on the said rack bar for applying a paste line to a web resting on said platen when at rest and when said powered tooth rack is operated to the right, or rearwardly.

3. In a coating machine, a paste box; standard bearings at the corners thereof; angle plates fixed to said bearings and having arcuate guide slots; a coating pad supported by said slots;

means for' operating the coating pad in the arc of said slots; rack bars under said paste box;

and a gear rod engaging said rack bars through which the paste box may be adjusted in position. 4. In a coating machine, the combination of a frame; an intermittently powered slidable toothed bar; a paste box; gear means for 'adjusting its position longitudinally; arcuate guides on said paste box; a rotary platen for feeding a web; rollers for applying continuous marginal paste lines to said web; a cross head; a pad on the under face thereof; pins projecting from the ends of the cross head into engagement with said guides; and gears and connections between said slidable toothed power bar and said cross head for moving the pad to the web in a fixed path between the dwells of the powered tooth bar feeding operations.

ROBERT J. HUTT. GEORGE A. HUTT.

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