Patent Application
20150128821
1. Field
The disclosed concept relates generally to machinery and, more particularly, to can decorator machines for decorating cans used in the food and beverage packaging industries. The disclosed concept also relates to ink station assemblies for can decorator machines.
2. Background Information
High speed continuous motion machines for decorating cans, commonly referred to as can decorator machines or simply can decorators, are generally well known.
While mounted on the mandrels, the cans 1 are decorated by being brought into engagement with a blanket 22 (e.g., without limitation, a replaceable adhesive-backed piece of rubber) that is adhered to a blanket segment 24 of a multicolor printing unit 26. Thereafter, and while still mounted on the mandrels, the outside of each decorated can 1 is coated with a protective film of varnish applied by engagement with the periphery of an applicating roll (not shown) in an overvarnish unit 28. Cans 1 with decorations and protective coatings thereon are then transferred from the can decorator 10 for further processing.
Application of ink to the can 1 is accomplished as follows. Prior to engagement with an undecorated can 1, the blanket 22 engages a plurality of printing cylinders 60, each of which is associated with an individual ink station assembly 30 (six ink station assemblies 30 are shown in the example of
One disadvantage of this configuration is that each roll in the ink train reduces the amount of solids in the ink. That is, the solids of the ink can be separated from the carrier as the ink is transferred from roll to roll resulting in little or no material reaching the printing plate. This is especially true if the ink requires a larger particle size, e.g. metallic inks, pearlescent inks, and other special inks. Further, in this configuration, there is less control over the quantity of ink applied to the printing cylinder.
One improvement, as discussed below, utilizes an anilox roll and a single form roll to transfer the ink. As is known, an anilox roll utilizes a number of cells disposed on the anilox roll outer surface. The cells meter, i.e. control, the amount of ink transferred to subsequent rolls. It is further known to apply the ink directly from the anilox roll to the printing cylinder. This is a disadvantage in that the anilox roll and the printing cylinder are relatively hard and, as such, the anilox roll and print cylinder wear on each other.
It is further known that, after the anilox roll cells are filled with ink, a doctor blade is used to remove excess ink. That is, the doctor blade is applied to the anilox roll surface and removes any ink not within a cell. In this configuration, the anilox roll produces a consistent printed image. This, however, can be a disadvantage in that if an image needs to be altered, a new anilox roll must be created and placed in the ink station assembly.
There is, therefore, room for improvement in can decorating machines and ink station assemblies.
These needs and others are met by embodiments of the disclosed concept, which provides a fountain blade assembly for an ink station assembly. The ink station assembly includes an anilox roll and an ink fountain. The ink fountain includes a liquid ink supply and the fountain is structured to apply said ink to said anilox roll. A fountain blade assembly includes a mounting assembly, a blade assembly, and an adjustment assembly. The mounting assembly includes a mounting. The blade assembly includes a blade with a first edge. The blade is coupled to the mounting. The blade first edge is disposed adjacent to the surface of said anilox roll. The blade first edge includes a plurality of adjustable portions, each blade first edge adjustable portion is structured to move between a first position, wherein each said blade first edge adjustable portion is spaced from said anilox roll outer surface, and a second position, wherein each said blade first edge adjustable portion engages said anilox roll outer surface. The adjustment assembly includes a number of adjustment devices, each adjustment device structured to move a blade first edge adjustable portion between the first and second positions. Thus, at least one blade first edge adjustable portion is disposed in a different position relative to another blade first edge adjustable portion. In this configuration, the amount of ink in the ink film can be controlled, thereby affecting the image that is printed.
A full understanding of the disclosed concept can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which:
Directional phrases used herein, such as, for example, clockwise, counterclockwise, left, right, top, bottom, upwards, downwards and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.
As used herein, the singular form of “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.
As used herein, the statement that two or more parts or components are “coupled” shall mean that the parts are joined or operate together either directly or indirectly, i.e., through one or more intermediate parts or components, so long as a link occurs. As used herein, “directly coupled” means that two elements are directly in contact with each other. As used herein, “fixedly coupled” or “fixed” means that two components are coupled so as to move as one while maintaining a constant orientation relative to each other. Accordingly, when two elements are coupled, all portions of those elements are coupled. A description, however, of a specific portion of a first element being coupled to a second element, e.g., an axle first end being coupled to a first wheel, means that the specific portion of the first element is disposed closer to the second element than the other portions thereof. Further, an object resting on another object held in place only by gravity is not “coupled” to the lower object unless the upper object is otherwise maintained substantially in place. That is, for example, a book on a table is not coupled thereto, but a book glued to a table is coupled thereto.
As used herein, the statement that two or more parts or components “engage” one another shall mean that the elements exert a force or bias against one another either directly or through one or more intermediate elements or components.
As used herein, the word “unitary” means a component is created as a single piece or unit. That is, a component that includes pieces that are created separately and then coupled together as a unit is not a “unitary” component or body.
As used herein, the term “number” shall mean one or an integer greater than one (i.e., a plurality).
As used herein, a “coupling assembly” includes two or more couplings or coupling components. The components of a coupling or coupling assembly are generally not part of the same element or other component. As such, the components of a “coupling assembly” may not be described at the same time in the following description.
As used herein, a “coupling” or “coupling component(s)” is one or more component(s) of a coupling assembly. That is, a coupling assembly includes at least two components that are structured to be coupled together. It is understood that the components of a coupling assembly are compatible with each other. For example, in a coupling assembly, if one coupling component is a snap socket, the other coupling component is a snap plug, or, if one coupling component is a bolt, then the other coupling component is a nut.
As used herein, “associated” means that the elements are part of the same assembly and/or operate together, or, act upon/with each other in some manner. For example, an automobile has four tires and four hub caps. While all the elements are coupled as part of the automobile, it is understood that each hubcap is “associated” with a specific tire.
As used herein, “correspond” indicates that two structural components are sized and shaped to be similar to each other and may be coupled with a minimum amount of friction. Thus, an opening which “corresponds” to a member is sized slightly larger than the member so that the member may pass through the opening with a minimum amount of friction. This definition is modified if the two components are said to fit “snugly” together or “snuggly correspond.” In that situation, the difference between the size of the components is even smaller whereby the amount of friction increases. If the element defining the opening and/or the component inserted into the opening are made from a deformable or compressible material, the opening may even be slightly smaller than the component being inserted into the opening. This definition is further modified if the two components are said to “substantially correspond.” “Substantially correspond” means that the size of the opening is very close to the size of the element inserted therein; that is, not so close as to cause substantial friction, as with a snug fit, but with more contact and friction than a “corresponding fit,” i.e., a “slightly larger” fit. Further, as used herein, “loosely correspond” means that a slot or opening is sized to be larger than an element disposed therein. This means that the increased size of the slot or opening is intentional and is more than a manufacturing tolerance. Further, with regard to a surface formed by two or more elements, a “corresponding” shape means that surface features, e.g. curvature, are similar.
As used herein, “structured to [verb]” means that the identified element or assembly has a structure that is shaped, sized, disposed, coupled and/or configured to perform the identified verb. For example, a member that is “structured to move” is movably coupled to another element and includes elements that cause the member to move or the member is otherwise configured to move in response to other elements or assemblies.
As used herein, “at” means on or near.
As used herein, the term “can” refers to any known or suitable container, which is structured to contain a substance (e.g., without limitation, liquid; food; any other suitable substance), and expressly includes, but is not limited to, food cans, as well as beverage cans, such as beer and soda cans.
As used herein, the term “ink train” refers to the pathway by which ink is transferred through the ink station assembly and, in particular, from the ink fountain, through the various rolls of the ink station assembly to the printing plate cylinder.
As used herein, “ink film communication” means that a film of ink is transferred from one element to another while generally maintaining the distribution and configuration of ink in the film. That is, the ink is located in some locations and not others, and, the amount of ink is concentrated in some locations more than others. The communication of the ink film may be direct or indirect. That is, the ink film may be communicated from a first element directly to a final element, or, indirectly from a first element through a number of intermediate elements to a final element.
The specific elements illustrated in the drawings and described herein are simply exemplary embodiments of the disclosed concept. Accordingly, specific dimensions, orientations and other physical characteristics related to the embodiments disclosed herein are not to be considered limiting on the scope of the disclosed concept.
Generally, and in an exemplary embodiment, the ink station assembly 200 includes a limited number of rolls 210 (each roll, or type of roll, is described below). In another exemplary embodiment, the ink station assembly 200 includes a very limited number of rolls 210. The rolls 210 form an ink train 220 to the printing plate cylinder 218. That is, each roll 210 in the ink train 220 is in ink film communication with at least one adjacent roll 210. The number of rolls 210 includes a first roll 210A and a final roll 210Z. As set forth below, in different embodiments, there are no rolls 210, or, a number of rolls 210 between the first roll 210A and the final roll 210Z. The first roll 210A is in liquid communication with the ink fountain assembly 208. It is understood that, the ink 2 in the ink fountain assembly 208 is liquid; thus, as used herein, a roll 210 “in liquid communication with the ink fountain assembly 208” means that liquid ink 2 is applied to the roll 210. The first roll 210A is in ink film communication with the final roll 210Z. The final roll 210Z is in ink film communication with the printing plate cylinder 218. In an exemplary embodiment, the ink train 220 includes only the first roll 210A, the final roll 210Z, and the printing plate cylinder 218. The first roll 210A is also known as the fountain roll 211 in that the first roll 210A is in liquid communication with the ink fountain assembly 208.
That is, in an exemplary embodiment, the first roll 210A is an anilox roll 212 and the final roll 210Z is a form roll 214. The anilox roll 212 is discussed below. The form roll 214 includes resilient surface 230 which, in an exemplary embodiment, is made from rubber or a similar resilient or semi-resilient material. It is noted that use of a roll 210 with a resilient surface 230 reduces wear and tear on the anilox roll 212. Further, in an exemplary embodiment, neither the ink train 220 nor the ink station assembly 200 includes a ductor roll, a distributor roll, a transfer roll, or an oscillator roll. That is, in this embodiment, the ink station assembly 200 does not include any of a ductor roll, a distributor roll, a transfer roll, or an oscillator roll. In another exemplary embodiment, not shown, the ink train 220 and the ink station assembly 200 includes a second form roll (not shown).
In an exemplary embodiment, the drive assembly 202 is operatively coupled to the anilox roll 212 and the printing plate cylinder 218. The form roll 214 operatively engages the anilox roll 212 and rotates therewith. Further, in an exemplary embodiment, the form roll 214 further operatively engages the printing plate cylinder 218. Thus, the printing plate cylinder 218 rotates with the form roll 214.
Accordingly, a method of decorating cans using the can decorator 100 machine (partially shown in
As shown in
In an exemplary embodiment, the ink fountain assembly 208 includes a housing assembly 390 defining an enclosed space 392. As set forth below, certain elements of the fountain housing assembly 390 (
The ink fountain assembly 208 further includes a fountain blade assembly 400, as shown in
The fountain blade assembly 400 includes a mounting assembly 402, a blade assembly 404, and an adjustment assembly 406. In an exemplary embodiment, as shown, the mounting assembly 402 includes a mounting body 410 (hereinafter “mounting body” is shortened to “mounting, e.g.,” “mounting 410”), a clamp plate 412, a backer plate 414, and two side plates 416, 418, as well as the number of seals 395 discussed above. As noted above, the fountain housing assembly 390 and the mounting assembly 402, as well as the mounting 410, are elements of the same construct and are given different names herein for the sake of discussion. It is further understood that in another embodiment, not shown, the fountain housing assembly 390 and the mounting assembly 402 are separate elements with the mounting assembly 402 coupled to the fountain housing assembly 390 adjacent the anilox roll 212.
In an exemplary embodiment, the mounting 410 includes a generally planar lower surface 420 and a generally planar upper surface 422. The mounting lower and upper surfaces 420, 422 are, in an exemplary embodiment, at an angle relative to each other. As shown, the angle is about 15 degrees. The clamp plate 412 is a substantially rigid, planar body 430 structured to be coupled to the mounting upper surface 422. The backer plate 414 is, in an exemplary embodiment, a planar body 432 made from resilient spring steel and is structured to enhance the bias of the blade assembly 404.
As shown in
In an exemplary embodiment, the blade 440 includes a number of elongated segments 450 disposed immediately adjacent each other. Each blade segment 450 includes one blade first edge adjustable portion 446. In another embodiment, not shown, the blade body 442 is a unitary body including parallel slits (not shown) extending inwardly from the blade first edge 444. That is, generally, the blade body 442 is similar to a comb, but wherein there is no, or a minimal, gap between the “teeth” of the comb. In another embodiment, not shown, the blade body 442 is a very resilient unitary body wherein a bias applied to one area of the blade first edge 444 is not significantly transmitted to another area of the blade first edge 444.
The adjustment assembly 406, in an exemplary embodiment, includes a number of adjustment devices 460. Each adjustment device 460 is associated with, and structured to move, one blade first edge adjustable portion 446 between the first and second positions. That is, in an exemplary embodiment, there is an equal number of adjustment devices 460 and blade first edge adjustable portions 446. Thus, each blade first edge adjustable portion 446 has one associated adjustment device 460. In an exemplary embodiment, and as shown in Figures and 9, the adjustment devices 460 include a number of elongated bodies 462 each with a movable coupling 464. Each adjustment device body 462 includes a first end 470, a medial portion 472 and a second end 476. Each adjustment device body first end 470 is structured to engage an associated blade segment 450. In an exemplary embodiment, each adjustment device body first end 470 is generally conical and tapered at an angle substantially similar to the angle between the mounting lower and upper surfaces 420, 422. Each adjustment device body medial portion 472 includes a threaded portion 478. The adjustment device body threaded portion 478 is the movable coupling 464, as described below. Each adjustment device body second end 476 includes an actuator which, in an exemplary embodiment, is a knob 480. Further, in an exemplary embodiment, not shown, each adjustment device body second end 476, and/or the adjustment device body medial portion 472, includes an indicia indicating a longitudinal measurement. Further, the mounting 410 includes tubular collars (not shown) disposed about the adjustment device body second end 476 that provides a structure to which the indicia may be compared.
Further, the mounting 410 defines a number of elongated passages 490. The mounting passages 490 extend, in an exemplary embodiment, generally parallel to the mounting lower surface 420. Each mounting passage 490 includes a threaded portion 492. The mounting passages 490 correspond to the adjustment device body 462 and the mounting passage threaded portion 492 is structured to be coupled to the adjustment device body threaded portion 478.
The fountain blade assembly 400 is assembled as follows. The blade 440 is disposed on the mounting upper surface 422 with the plane of the blade 440 substantially corresponding to the plane of the mounting upper surface 422. The backer plate 414 is disposed on the blade 440, and, the clamp plate 412 is disposed on the backer plate 414. The blade 440, backer plate 414, and clamp plate 412 are, in an exemplary embodiment, coupled by fasteners (not shown) that extend into the mounting 410. Each blade first edge adjustable portion 446, that is, each blade segment first edge 444, extends beyond the mounting upper surface 422. Further, the adjustment devices 460 are disposed in the mounting passages 490 with each adjustment device body threaded portion 478 threadably coupled to a mounting passage threaded portion 492. As noted above, in an exemplary embodiment, there are an equal number of blade segments 450 and adjustment devices 460. The mounting passages 490 are positioned so that each adjustment device 460 is generally aligned with a blade segment 450.
In this configuration, when the blade 440, and/or the blade segments 450, are disposed in a plane substantially parallel to the mounting upper surface 422, the blade first edge adjustable portions 446 are in their first positions. That is, when each blade first edge adjustable portion 446 is in the first position, the entire blade body 442 is generally parallel to the mounting upper surface 422. Each adjustment device 460 is moved to a position, e.g. rotated so that the threaded coupling advances the adjustment device 460 longitudinally, until the adjustment device body first end 470 contacts a blade first edge adjustable portion 446. Further longitudinal motion of the adjustment device 460 toward the blade first edge adjustable portions 446 causes the adjustment device body first end 470 to engage and move the associated blade first edge adjustable portion 446 toward the second position.
That is, the ink fountain assembly 208 and fountain blade assembly 400 is positioned so that the blade first edge adjustable portion 446, when in the first position, is spaced from the anilox roll outer surface 352. In an exemplary embodiment, the blade first edge adjustable portion 446, when in the first position, is spaced from the anilox roll outer surface 352 between about 0.010 inch and 0.020 inch or about 0.015 inch. Thus, when an adjustment device 460 is moved longitudinally toward the blade 440, the engagement of the adjustment device 460 with the associated blade first edge adjustable portion 446 causes the blade first edge adjustable portion 446 to move toward, and then into, the second position. It is understood that the advancement of the adjustment device 460 may be stopped at any position between the first and second positions. Further, as shown, and in an exemplary embodiment, each adjustment device body medial portion 472 extends from the mounting passage 490 so that a user may actuate the adjustment device 460, i.e. in the exemplary embodiment, by rotating the adjustment device 460.
Thus, at least one blade first edge adjustable portion 446 is disposed in a different position relative to another blade first edge adjustable portion 446. In this configuration, the amount of ink removed from the anilox roll outer surface 352 is controlled. That is, for example, one blade first edge adjustable portion 446A is positioned in the second position, whereby substantially all the ink on the portion of the anilox roll outer surface 352 that passes under that blade first edge adjustable portion 446A is removed. An adjacent blade first edge adjustable portion 446B, however, is in the first position; thus, little of the ink on the portion of the anilox roll outer surface 352 that passes under that blade first edge adjustable portion 446B is removed. In this manner, the amount of ink on the anilox roll 212, and therefore the amount of ink transferred to the first roll 210A and a final roll 210Z, is controlled. That is, in conjunction with the volume of the anilox roll cells 354, the fountain blade assembly 400 controls the amount of ink that comprises the ink film that is applied to any subsequent roll 210.
While specific embodiments of the disclosed concept have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of the disclosed concept which is to be given the full breadth of the claims appended and any and all equivalents thereof.
