|Publication number||US2152027 A|
|Publication date||Mar 28, 1939|
|Filing date||Jul 26, 1937|
|Priority date||Jul 26, 1937|
|Publication number||US 2152027 A, US 2152027A, US-A-2152027, US2152027 A, US2152027A|
|Original Assignee||Harry Carll|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (2), Classifications (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 28,1939. H ARLL 2,152,027
SUCTION CLEANER FOR BAG PRlNTING MACHINES Filed July 26, 1957- 2 Sheets-Sheet. l
www ATTORNEY March 28, 1939. l H CARLL 2,152,027
SUCTION CLEANER FOR BAG PRlNTNG MACHlNES Filed Julyzs, 1957` 2 shams-shew 2 BY 5 `4Q M Y @Mw-w l ATTORNEY Patented Mar., 28, 1939 SUCTION CLEANER FOR BAG PRENTING MACHHNES Harry Carll, Tacoma, Wash. Application July 26, 1937, Serial No. 155,713
whereby loose lint, fibers, dust, dirt and parti- I cles or pieces of other loose material may be removed from the surfaces of the bags on which the printing is to be done, thus to eliminate its collecting on the surfaces of the` printing plate and inking rollers.
As a matter of explanation, it will here be stated that in the ordinary use of machines of this character, there is considerable delay necessitated, anddifliculty experienced, by reason of the fact that the type'on the plate and'inking rollers pick up much loose material from the bags with which they come in Contact, and the material that is picked up eventually clogs the type to the extent that the machine must be stopped and the type cleaned. This is a very frequent occurrence and is objectionable because of delay and expense incident to delay. It is in order to avoid this objectionable feature of cleaning the printing type and inking roller that the present invention has been devised. However, it is not intended that the invention shall be confined to the machine shown, but shall apply to all types within the scope of the invention disclosed.
More specifically stated, it is the object of the present invention to provide a suction shoe that is operable in connection with the feed devices of the bag printing machine to Contact with each bag as it enters the machine and to remove from the surface that is to be printed on, by suction, the loose bers of material, dust and dirt which would be detrimental to obtaining the best results of printing.
Other objects of the invention reside in the details of construction and in the combination of parts of the device, and in the mode of operation, as will hereinafter be fully described.
In accomplishing these and other objects of the invention, I have provided the improved details, the preferred forms of which are illustrated in the accompanying drawings, wherein- Fig. 1 is a side elevation of a bag, or sack printing machine to which the present invention has been applied.
Fig. 2 is a sectional detail of a part of the machine showing the suction shoe as applied, and
illustrating its relationship to the bag feed belt 5 and the printing roller.
Fig. 3 is a front end elevation of the suction device and the adjacent part of the machine.
Fig. 4 is a plan view of the same.
Before vgiving a further explanation of the drawings, it will be mentioned that the details of construction of the machine to which the suction shoe is here shown applied are of no particular consequence, but that the present illustration, which is of a machine quite well known, 5
is used only because it well shows the use and operation of the suction shoe. It is intended that this shoe may be applied to printing machines of other kinds, either with or without 20 alteration.
Referring more in detail to the drawingsl designates, in its entirety, a bag printing machine of a type with which the present device is adapted to be associated. The printing machine comprises a frame structure 2 mounting a pair of horizontal rollers 3 and l supported in spaced relation by cross shafts 3a and da, respectively. Mounted for travel about the rollers 3 and 4, and held taut thereby, is a continuous feed belt 5 upon which the sacks or bags to be 30 printed may be fed beneath a printing roller 6 to receive the printing thereon.
The printing roller as here seen, is of substantial diameterand is mounted in the frame structure 2 by a horizontal supporting and driv- 35 ing shaft l. By reference to Figs. 1 and 2, it will be observed that the shaft 'l is directly above the shaft 3a, and is so spaced from roller 3 that the pressure necessary for printing is received directly by the roller 3 which serves not only as 4 a support and driving means for the belt 5, but also serves as a backing for the printing operation on the sacks as they are delivered over the roller by the feed belt.
As the printed sacks are discharged from be- 4 tween the belt 5 and the printing roller 5, they are received upon a downwardly inclined stacking board il, which is fixed at its lower end to a cross shaft lll. This shaft is rotatably supported in the frame 2 and at one end, is equipped with 50 not thought necessary to explain it to any further extent.
Pivotally attached to the frame 2, to extend along opposite sides of the belt 5, are paired 1ever arm I 3-I3 which, at their outer ends, mount a cross shaft I5 on which rollers IG--IG are mounted to engage in rolling contact with the feed belt 5 directly above or adjacent the cross roller 4. The sacks or bags that are to be printed are manually fed to the belt 5 for advancement into the machine by the belt, by inserting their forward end portions between the belt and the roller I5, and in order that they may be easily inserted and properly timed in their delivery to the printing roller, provision is made for periodically raising the rollers IE-IB a slight distance above the belt. This operation of raising and lowering the rollers is in timing with the rotation of the printing roller and is effected by paired cams I8 that are fixed on the cross shaft 1 adjacent the opposite ends of the printing roller and which are adapted, with each rotation of the shaft 1, to contact with cam followers I9'on the inner ends of the lever arms |3-I3 in such manner as to cause the outer ends of the levers to lift the rollers IS--IS from contact with the belt 5. It is to be understood that when the rollers I 8-I6' are lifted, the end of a sack may then be projected beneath them. Then, when the rollers Iii-I6' are dropped downwardly against the inserted sack end, the friction of the belt 5 with the sack carries the latter along the belt to the printing roll, and the label, trade-mark, brand or other matter will be printed on the sack as it is carried by the belt between the printing roll 6 and. the roller 3. 'I'he type whereby the printing is accomplished may be of metal, wood or rubber, and may be applied to the roller 6 in any suitable manner. Since this is not a part of the present invention, it is not believed necessary to explain it to any further extent. Likewise, inking of the printing type is effected in the conventional manner through the mediacy of ink applying rolls, as designated at 20" in Fig. 2, which are located above the rollers 6.
In the present showing, the machine is driven by an electric motor 25 which is mounted upon the top of the frame 2. This motor has a belt wheel 26 on its driven shaft about which a belt 21 operates to drive a large belt wheel28 that is fixed on a supporting shaft 29 mounted for rotation in the lower portion of the frame 2. On the shaft 29 a belt wheel 3U is fixed, about which wheel a belt 3I operates to drive a belt wheel 32 xed on a cross shaft 33. Shaft 33 has a geared connection as at 34-35 and 36, with the shaft 1, and also at 31 with shaft 3a to drive the roller 3 and belt 5.
'Ihe gist of the present invention resides in the provision of means for removing the lint and dust from the surfaces of the sacks on which the printing is to be done, and this means comprises a hollow suction head 40 of substantial volume and provided with a narrow, elongated mouth 4| disposed transversely of and closely adjacent the belt 5 along the top of the belt mounting roller 4. The mouth 4I is of such length from end to end that it will extend across the sack or at least across the surface which is to receive the printing matter. The shoe itself is hollow and of substantial volume and has a pipe connection 45 leading centrally from the top thereof inwardly over the belt 5, and then laterally as designated at 45a, and is provided at the side of the machine with a rearwardly turned part 45h connected through a flexible connection 41 with a pipe 48 leading to a source of suction. The shoe 40 is supported on shaft I5 to raise and lower with the feed rolls IB-I 6. The suction pipe 45 also is fixed to one of the lever arms, I3', as will be noted by reference to Figs. 3 and 4, to move therewith. The manner of mounting the shoe provides that it will raise and lower with the feed rollers IG-I 6 and when the latter move down against a sack for the purpose of causing it to be fed into the machine, the mouth of the suction show will be moved against the top surface of the sack and the suction applied through the mouth of the shoe will operate after the fashion of the ordinary suction carpet sweeper, to remove the dirt, dust, and lint from the sack. It is important in this respect that the suction shoe shall raise and lower with the feed rolls so as not to interfere with the feeding of the sacks into the machine.
Any suitable flexible connection other than that shown may be provided between the source of suction and the suction shoe, and the shoe might well be mounted in other ways than that shown.
Assuming the device to be so constructed, and applied to the machine, as shown, it is quite apparent that, assuming that the suction is adequate, all the detrimental foreign matter may be removed from the sack and this will result not only in cleaner and more satisfactory application of the label or printing to the sack surface, but will make it unnecessary to clean the type during the ordinary period of printing.
Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is l. In a bag printing machine, a printing roller, a traveling carrier on which bags may be placed flatly for delivery to the printing roller, feed rollers arranged above the carrier means for raising and lowering the feed rollers from and toward the carrier for reception and for feeding of the bags into the machine, a suction shoe connected with a source of suction and having a mouth positioned for the passing of the bags thereacross in their delivery to the printing roller and means for raising and lowering the shoe from and toward the carrier in accordance with raising and lowering of the feed rollers.
2. In a bag printing machine of the character described, a rotating printing roller, belt mounting rollers, a belt mounted for travel about said rollers and' upon which bags may be carried flatly to the printing roller, means for driving the belt and the printing roller, feed rollers associated with the belt, means mounting said feed rollers and actuated in timing with the rotation of the printing roller to raise and lower them against the belt, and a suction shoe mounted by the feed roller mounting means to raise and lower the shoe accordingly from and against the belt; said shoe having a mouth across which bags are delivered by the belt to the printing roller.
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