US2294598A - Conveyer for use with machines for proofing cartons and the like - Google Patents

Description

c. w. HARTMANN Sept. 1,1942.

CONVEYER FOR USE WITH MACHINES FOR PROOFING CARTONS AND THE LIKE Filed April 27, 1940 4 Sheets-Sheet l OPNE Y5 p 1942. c. w. HARTMANN 2,294,593

CONVEYER FOR USE WITH MACHINES FOR PRQOFING CARTONS AND THE LIKE Filed April 27, 1940- 4 Sheets-Sheet 2 Sept. 1, 1942. c. w. HARTMANN 2,294,598

CONVEYER FOR USE WITH MACHINES FOR PROOFING CARTONS' AND THE LIKE Filed April 27, 1940 4 Sheets-Sheet 3 Pee Sept. 1, 1942. c. w. HARTMANN CONVEYER FOR USE WITH MACHINES FOR PROOFING 'CARTONS AND THE LIKE Filed April 27, 1940 4 Sheets-Sheet 4 Tmw 4 T ratavs vs Patented Sept. 1, 1942 s PATENT OFFICE CONVEYER FOR USE WITH MACHINES FOR PROOFING CARTON S AND THE LIKE Carl Wilhelm Hartmann,

hagen, Denmark, assignor Edinburgh, Scotland Lyngby, near Copento Satona Limited,

Application April .27, 1940, Serial No. 332,029 In Great Britain May 26, 1939 Claims.

This invention relates to conveyers for use with machines for proofing cartons and the like, e. g. in which empty cartons with closed bases are fed through a bath of molten wax and then transferred by conveying means to a filling or collecting zone. The chief object of this invention is to provide conveying means which firmly supports the individual cartons so that during their conveyance they can be subjected to one or more operations such as e. g. scraping off surplus wax or filling them with the desired commodity. Another object of this invention is to provide conveying means which does not injure the proofing on the cartons and enables surplus proofing material on the cartons to be disposed of before solidifying into uneven parts on the cartons, thereby effecting economy in the proofing material and obtaining substantially uniformly coated cartons. A still further object of this invention is to provide a conveyer which will eifectively co-operate with the proofing apparatus described in co-pending application No. 332,034, filed the 27th of April, 1940.

According to one form of this invention conveying means for cartons comprises an endless conveyer with an upper conveying track and provided with a plurality of equi-distantly spaced carton engaging abutments, a number of knife edge carton supports extending along the carton base supporting plane, and means adapted to scrape the bases of the conveyed cartons arranged subjacent to said upper track.

In order that this invention may be clearly understood and readily carried into effect drawings are appended hereto illustratin an embodiment thereof as applied to the wax coating apparatus described in the said co-pending application, and wherein:

Fig. 1 is a diagrammatic side elevation view showing the relative positions of the waxing apparatus and partly the conveying means, the remainder of the conveying means also being shown in diagrammatic side elevation in Fig. 1a.

Fig. 2 is a sectional elevation of the receiving end of the conveyer.

Fig. 3 is a sectional end elevation of Fig. 2, and

Fig. 4 is a plan view of one of a number of carton pushing bars of the conveying means.

Referring to the drawings the apparatus and conveying means shown is adapted for coatin a set and conveying a number of such sets of cartons simultaneously. The cartons l are delivered by fingers 42 off one end of a supplv conveyer (not shown) into carton supports 43 carried by a drum 45 rotating in a casing surmounting a wax bath 4|. Gripping members 5| (see Fig. l) operated by levers 48 and links 50 grip the cartons in the supports 4| as described in the said co-pending application, and the drum rotates in the direction of the arrows.

Riollers 52 traversing guide rails 53 impart oscillation to the carton supports as they pass from the supply stage containing the fingers 42 to the discharge stage containing a transverse set of withdrawing members 55 hereinafter more fully described, these members 55 delivering the wax coated cartons on to the upper track of a conveyer 51. Heaters maintain the wax in the bath molten, and abutments 49 and 49a operate the levers 48 at the appropriate points.

Subjacent to and parallel with the upper track of the conveyer 51 are a number of parallel base rails (four pairs being shown by way of example) on to which are delivered the cartons by the members 55, these members 55 having upstanding fingers 56 at their ends remote from the conveyer to abut against the trailing sides of the cartons as the said members 55 are engaged by the bases of the set of cartons in the appropriate supports 43 and then moved forwardly between the said base rails to deposit the cartons upon the entrant ends of such rails.

The said conveyer 51 carries equi-distantly spaced transverse rods 58 which in the upper track of the conveyer pass beneath and in plane parallel with the plane containing longitudinal guide rails 59, so that viewed in plan the rods 58 intersect the rails and afford a large number of square frames each receiving a single carton.

The arrangement of the said guide rails 59 comprises five parallel equi-distantly placed metal bars sufficiently widely spaced to lightly engage tWo sides of each carton, the five bars being provided for conveying cartons in sets of four. At the entrant end of the conveyer the longitudinal bars are located so as to receive between them the cartons transferred by the beforesaid members 55 from the holders 43 of the apparatus for coating the cartons with wax. The other end of the conveyer is provided with five segmental or part annular plates 68 to assist in guiding the cartons on to a collecting table or on to another conveyer 56, the cartons passing through substantially on to the collectin table or conveyer 6B and the inner arcuate edges of the plates 58 are preferablyv shaped so as to be in continuity with the guide rails 59.

The transverse rods 58 are connected across a plurality of L shaped plates 69 fixed by depending lugs II! to links H connected. together to form two endless parallel chains comprising the conveyer 51.

The means for removing surplus wax from the bases of the cartons comprises a pluralit of transversely disposed horizontal blades 12 with sharp upper edges, the blades being inclined so as to afford the most suitable scraping action. These blades are supported grid-fashion in inclined slots cut in the upper edges of four pairs of the longitudinal angle section bars comprising the base rails 60, each such pair of rails being symmetrically arranged, the upper edges 01 these angle section rail bars preferably being bevelled as at 60a 50 as to avoid collecting wax upon their upper edges and to afford only edge contact with the bases of the cartons. A tray or trays 63 is or are located immediately beneath the rails 60 for collecting th wax dripping from the cartons and can be heated by heaters 64 so as to keep the collected wax in a molten condition to enable it to flow back to the bath, and this can be effected by means of a draining cook 13. The blades 12 can be heated and obtain heat from the same source as the trays 63.

The members 55 for transferring the cartons from the holders of the Waxing apparatus can comprise four fingers, each as shown in the form of an inverted L-shaped plate, the upper limb of each such plate being tapered to a point at its free end which is formed with a barb-like projection 56 to engage against the inner edge of the appropriate carton to be removed from its holder. The vertical limbs of the four L- shaped plates are secured to a transverse bar 14 which has imparted to it a reciprocating motion so synchronized with the movements of the holders 43 that the upper limbs of these L-shaped plates engage and are urged under the bases of the cartons in the holders as the holders occupy a position with their bases slightly below the plane of the upper edges of the upper limbs of the L shaped plates. After the carton holders have descended sufficiently to clear the members 55 these members are retracted to pull the cartons towards the conveyer 51. The holders 43 consist of open frames or narrow rods as shown and the L-shaped bars can pass between the rods at the appropriate stage. The upper edges of the L shaped plates are arranged in substantially the same plane as the upper edges of a horizontal plate 15 located just beneath and close to the upper track of the chains comprising the conveyer 51, so that the cartons are carried on to such plate by the co-operative movements of the L shaped plates and the transverse rods 58 of the conveyer, the horizontal plate 15 being slotted as at 16 to allow the feeding plates 55 to pass therethrough.

The frame 64 through which th conveyer 51 passes may be shaped to carry a suitable filling apparatus 8| to enable the cartons to be filled. This apparatus, if desired, can have sealing means 64 provided therewith for closing the cartons.

The conveyer 51 preferably has an intermittent movement imparted to it by means of Maltesecross or other suitabl driving mechanism indicated diagrammatically at 6! in Fig. 1. The cartons are thus moved step by step, and at each period when the conveyer is stationary cartons are placed thereon at one end. This also enables a carton filling operation, and also if desired a sealing operation to be carried out at each stationary period.

The means for obtaining the intermittent feed of the feeding plates 55 can comprise a reciprocating carriage l1 operated by an oscillating arm Tia and supported by rollers 18 running on two parallel guide rails 18a. The transverse bars 58 which push the cartons along the knife edged guide rails 59 are provided with thin plates 79 with V shaped teeth to engage the cartons so that only point contact is made with the trailing walls of the cartons. By this means disfiguring marks on the cartons due to pressure on the soft wax is obviated. The longitudinal guide rails 59 can be supported from the machine frame by vertial rods 59a, and fitted with thin plates 5% to engage the cartons.

I claim:

1. Conveying means for transferring cartons and the like from waxing or coating means comprising an endless conveyer with an upper conveying track and provided with a plurality of equidistantly spaced carton engaging abutments, a number of knife edge carton supports extending along the carton base supporting plane, and means adapted to scrape the bases of the conveyed cartons arranged subjacent to said upper track.

2. Conveying means for transferring cartons and the like from waxing or coating means comprising a conveyer constituted by a parallel pair of endless members, a plurality of equi-distantly spaced transverse pushing members supported across said parallel pair of endless conveyor members, and a plurality of stationary longitudinal guide rails disposed above the upper track of the conveying members so that the pushing members and rails are arranged in intersecting directions and aflord a large number of substantially rectangular frames each adapted to receive a carton, the pushing members moving 'translatively along the longitudinal uide rails to carry the cartons or the like to the filling or collecting zone, a number of parallel longitudinal carton supporting bars upon which the bases of the conveyed cartons are supported, and a plurality of scrapers for removing surplus wax from the carton bases arranged grid-fashion transversely across the said longitudinal supports.

3. Conveying means for transferring cartons and the like from waxing or coating means comprising an endless conveyor with an upper con- 'veying track, a plurality of equi-distantly spaced carton engaging abutments carried by said conveyer and and afiording only point contact with the cartons, and means adapted to scrape the bases of the conveyed cartons arranged subjacen-t to said upper track.

4. Conveying means for transferring cartons and the like from waxing or coating means comprising a pair of parallel endless conveyor members with an upper conveying track, a plurality of equidistantly spaced transverse car-ton engaging abutment bars disposed transversely across said pair of conveyer members, means adapted to scrape the bases of the conveyed-cartons arranged subjacent to said upper track, longitudinal uide rails for the cartons parallel with said conveyer member, and a heated wax collecting vessel arranged immediately subjacent to said scraping means.

5. Conveying means for transferring cartons and the like from waxing or coating means comprising an endless conveyor with an upper conveying track and provided with a plurality of equi-distantly spaced transverse bars with pointed carton engaging projections acting as carton engaging abutments, a number of knife edged longitudinal carton supports upon the knife edges of which the bases of the conveyed cartons are supported, and a plurality of scrapersfor removing surplus wax from the carton bases arranged substantially transversely across the said longitudinal supports with scraping edgeson a plane close to the plane of the said knife edges.

CARL WILHELM ,HARTMANN.

Images