JP4293838B2 - Solid ink loader and solid ink supply system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a phase change type ink jet printer, more particularly to a loading mechanism in such a printer, and more particularly to a plurality of color-coded key plates used inside the loading mechanism.
[0002]
[Prior art]
The basic structure of a four color ink loader with a separate melting plate is described in US Pat. No. 5,734,402, US Pat. No. 5,861,903, US Pat. No. 6,056. , 394, etc., in already issued patents.
[0003]
[Patent Document 1]
US Pat. No. 5,734,402
[Patent Document 2]
US Pat. No. 6,056,394
[Patent Document 3]
US Pat. No. 5,861,903
[0004]
[Means for Solving the Problems]
The solid ink loader of the present invention is a solid ink loader that supplies a plurality of solid ink sticks in a phase change type ink jet printer, and the plurality of solid ink sticks are: Consists of contours that fit together on the front and back and different contours on each side, A plurality of first ink sticks having a first outer edge shape as well as A solid ink loader having a first supply channel for receiving the plurality of first ink sticks and a second for receiving the plurality of second ink sticks. A first key plate that covers at least a part of the first supply channel, the first key plate including a first opening corresponding to the first outer shape, and a second supply. A second key plate that covers at least a part of the channel and is different (separated) from the first key plate, and has a second opening corresponding to the second outer shape; ,including.
[0005]
In the solid ink loader of the present invention, the first key plate has a first ink stick color identification marking corresponding to the color of the first ink stick, and the second key plate has the second ink stick. A second ink stick color identification marking corresponding to the color is included.
[0006]
The solid ink supply system of the present invention is a solid ink supply system that supplies a plurality of types of solid ink sticks in a phase change inkjet printer, and each type of solid ink stick includes: Consists of a contour that fits on the front and back and a contour that differs on each side, Having a unique shape different from other types of solid ink sticks, the supply system includes a plurality of supply channels, each supply channel receiving an ink stick, and at least one plate in each of the plurality of supply channels. A plurality of key plates, each key plate having at least one insertion opening corresponding to the shape of a particular type of solid ink stick.
[0007]
Also, in the solid ink supply system of the present invention, each key plate has a color identification marking corresponding to the color of a specific solid ink stick.
[0008]
Furthermore, in the solid ink supply system of the present invention, the color identification marking substantially covers the entire key plate.
[0009]
Furthermore, the solid ink supply system of the present invention is such that the color identification marking includes a plurality of key plate colors, each of the key plate colors being substantially similar to a particular ink stick color corresponding to the key plate. .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a solid ink or phase change printer 10 that has an ink access cover 20. In FIG. 1, the ink access cover 20 is shown in a closed state. The front panel display screen 31 can display messages regarding the status of the printer. These messages may include, for example, “insufficient ink” or “ink is empty”.
[0011]
2 to 6 show an embodiment of an ink stick used in the embodiment of the ink loader described here. As described repeatedly in the description of the embodiments, the exact configuration of the ink stick disclosed herein is not critical to the ink loader disclosed herein or any particular part thereof. However, describing the general characteristics of the ink stick is useful for understanding the embodiments of the ink loader disclosed herein.
[0012]
The solid ink stick 2 is used in a phase change type ink jet printer such as the printer 10 shown in FIG. In embodiments, the ink stick generally has an upper end and a lower end, the upper end may be a substantially horizontal upper end, and the lower end is a substantially horizontal lower end. It may be. Sides connect the top and bottom edges of the ink stick. The side surface may be substantially straight from the upper end to the lower end, or may have steps or segments as shown in FIG. In embodiments, the ink sticks for different ink supply channels of a particular printer may be made identical. In other embodiments, for example, as shown in FIGS. 2 to 5, each color ink stick is different from the outer shape of the other color ink stick when viewed from above the ink stick. , May have a specific outer shape. The outer shape of the ink stick may be the shape of the upper end or the shape of the lower end (or both) of the ink stick, or may be the shape of a protrusion protruding from the side surface of the ink stick. 2 to 5, each ink stick has a front surface 3, a back surface 4, a first side surface 5, and a second side surface 6. In the embodiment shown in FIGS. 2 to 5, the front surface 3 and the back surface 4 have non-planar contours. Furthermore, the front surface 3 and the back surface 4 are designed to substantially complement each other so that the sticks are stacked in the supply channel.
[0013]
The shape of the outer side viewed from above the ink stick may include a configuration extending from the side surface below the upper end surface of the ink stick. Unless otherwise stated, when the term “outer side” is used, this term means a view of the ink stick looking down, as opposed to the outer side of the top surface of the ink stick.
[0014]
The ink sticks may have different shapes to distinguish different ink sticks. In particular, the ink sticks may have different outer perimeter shapes to allow differentiation. Different parts of the outer periphery of the ink stick may be associated with different differentiating elements.
[0015]
In an embodiment, at least a portion of the contour of the front surface 3 and at least a portion of the contour of the back surface 4 can be used to distinguish a particular printer model to use the ink stick. In such an embodiment, each ink stick in a particular printer model has the same front profile and the same back profile, regardless of the color of the ink stick. However, the front and back contours of the ink sticks are different from the front and back contours of the ink sticks of other printer models. When used with a complementary insert opening or receptacle 24 of a key plate 18 (shown in FIGS. 8 and 9) or push block 50 (shown in FIGS. 26 to 29), the contours of the front 3 and back 4 are Helps prevent users from adding the wrong ink stick to a particular printer.
[0016]
In the embodiment, each color ink stick 2A to 2D has a unique shape that can be distinguished from other color ink sticks by its side surfaces (5, 6). The outline of the first side surface 5 and the outline of the second side surface 6 may be different for each color. When used with a complementary insertion opening or receptacle 24 in the key plate 18, the side profile helps to prevent the user from adding the wrong ink stick to a particular channel. In the embodiment, the front surface 3 and the back surface 4 may be used to distinguish between different color ink sticks. Similarly, the side surfaces 5 and 6 may be used to distinguish models. In other embodiments, any combination of ink stick surfaces may be used to allow for various distinct functions.
[0017]
FIGS. 2-6 are exemplary and the present invention should not be understood as being limited by the specific contours of the front, back, and side of the illustrated ink stick and the specific contour of the key plate. In addition, the ink stick can be any color, but is typically one of the following four colors: cyan, yellow, magenta, and black. Each color ink stick has approximately the same volume as the other colors.
[0018]
FIG. 6 shows a front view of the ink sticks of FIGS. In the embodiment, each of the ink sticks 2A to 2D includes a lower guide element portion 7 formed as a part of the end of the ink stick body. In the illustrated embodiment, the guide element portion 7 extends downward from near one side of the ink stick main body. The guide element portion 7 is engaged with the channel guide rail 26 of the supply channel 25 of the ink stick loading bin or loader 16 and slidably engages (see FIG. 19). The ink stick guide element portion 7 is one of the support structures of the ink stick, and provides a first surface-like, linear or dot-like contact between the ink stick and the supply channel. Each ink stick also has a second guide element portion 8 formed on the opposite side of the ink stick body from the first guide element. The second guide element portion 8 can be formed near the upper portion of the ink stick as a part of the side surface of the upper end portion of the ink stick. The second guide portion 8 provides a second planar, linear, or point-like contact between the ink stick and the supply channel.
[0019]
FIG. 7 shows the printer 10 with the ink access cover 20 raised. The printer 10 includes an ink loading coupling element 30 and an ink stick supply assembly or ink loader 16. In the embodiment, the key plate 18 (18A to 18D) is disposed on the chute 9 divided into a plurality of supply channels 25 (25A to 25D) in the printer. FIG. 19 shows the chute 9. Each of the four ink colors has a dedicated channel for loading, feeding, and melting in the ink loader. The channel 25 guides the solid ink stick towards the melting plate 29 located at the end of the channel opposite the key plate insertion opening (see FIG. 18). These melting plates melt the ink and supply it to individual ink color reservoirs (not shown) in the print head of the printer 10. In addition, the key plate 18 and the melting plate 29 and the chute 9 are combined to form a housing that can accommodate a single or a plurality of ink sticks of each color. And can be used for melting.
[0020]
The printer embodiment includes a single key plate or multiple key plates 18 for different supply channels 25. In the illustrated embodiment, each supply channel has an individual key plate. FIGS. 8 and 9 show details of the key plate that controls which ink stick 2 enters which supply channel 25. Key plates 18A to 18D have receptacles or insertion openings 24 (24A-24D) through which ink sticks are inserted into channel 25. Each key plate 18 shown in FIGS. 8 and 9 includes a single insertion opening disposed near the rear of the key plate, but may have a plurality of insertion openings.
[0021]
The insertion opening 24 of the key plate 18 has a shape that substantially matches the outer shape of the ink stick 2 as viewed from the upper end surface of the ink stick. Each key plate 18 corresponds to a specific channel 25 and has a shaped or keyed insertion opening or receptacle 24 corresponding to a specific ink stick perimeter shape. In an embodiment, each color ink stick 2A-2D is formed with differently shaped front, back, first side, and / or second side features, and each key plate 18 is associated with a corresponding keyed opening. This distinction is made possible by forming with a part or receiving part 24. Keying makes it impossible to accidentally mix ink stick colors. The keying of the ink sticks 2A to 2D and the openings 24A to 24D helps to prevent ink color mixing in the individual color reservoirs (also not shown) of the printhead (not shown). Some of the ink stick keying elements may be removed from certain portions of the key plate insertion opening. This allows the keying function of that part to be incorporated into either the push block 50 or other part of the ink loader 16 such as one of the walls of each channel 25 of the chute 9.
[0022]
In addition to or instead of the individual key plates, a separate insertion opening peripheral element 21 can be formed and inserted through the key plate or a plurality of key plates into the enlarged key plate receiving part 19. In the embodiment, the enlarged key plate receiving portion 19 may have a common outer side shape. In such an embodiment, each insertion opening peripheral element 21 has an outer profile that substantially matches the shape of the enlarged keyplate receptacle 19. The insert opening peripheral element can be formed by an opening 24 that is appropriately shaped to receive the correct ink stick in the supply channel. FIGS. 10 to 15 show a plurality of key plates that use the insertion opening peripheral element 21. FIGS. 13 to 15 show a single key plate 27 for use with the chute, on which a plurality of insertion opening peripheral elements 21 are arranged.
[0023]
The ambient element may be connected to the key plate receptacle using any of several methods well known in the art. These methods include, for example, simple snap fitting or pressure fitting and vibration welding.
[0024]
A separate key plate 18 or ink stick insertion aperture peripheral element 21 provides flexibility in ink loader manufacture and assembly. When individual key plates or insert aperture surrounding elements are used, it is easy for the user to indicate the color match of which ink stick color to put in which channel. Providing individual key plates or insert aperture perimeter elements increases design and manufacturing flexibility and allows more assembly options. For example, using a new printhead may involve changing the color order of the channels. New printers using this design can use similarly manufactured key plates. However, these key plates are inserted in a different order. In addition, the printer can be retrofitted to accommodate differently shaped ink sticks by exchanging individual key plates 18 or individual insert opening peripheral elements 21.
[0025]
In an embodiment, the ability to color or instead mark the key plate 18 or a portion thereof, or the insert opening ambient element 21, to accurately identify the appropriate receptacle for each type of ink stick. Can also be improved. 8 and 9 show independent key plates 18A-18D, which are each colored to match or complement the ink color assignment for each color channel of the ink loader. Many methods are available for color coding the key plate 18. For example, the entire key plate can be shaped or shaded with a color that complements the ink that is inserted, or a portion of the key plate can be shaded. Such shading can be performed by forming the key plate or part thereof from injection molded plastic and pouring the appropriate color into the plastic. Ink stick colors are dark and may be difficult to distinguish with a sufficiently high density. In the embodiment, the color of the corresponding ink stick is injected into each of the key plates 18A to 18D or the insertion opening surrounding element 21 at a sufficiently low concentration so that the color can be clearly distinguished between the key plates or between the surrounding elements. May be. The key plate formed in this manner may be opaque, translucent, or substantially transparent. Alternatively, the key plate can be formed of other plastic, metal, wood, etc. materials, and all or part of the key plate can be coated with paint or coloring powder, or have an appropriate color A label may be attached to the key plate.
[0026]
In an embodiment, the ambient element 21 may also include color indicator markings to identify which ink stick color is acceptable to a particular supply channel, such as color shading. 10 and 13 show an embodiment that does not include a color code. FIG. 10 shows an embodiment in which neither the plurality of key plates 18 nor the plurality of insertion opening surrounding elements 21 have color code features. FIG. 13 shows the key plate 27 and the individual insertion opening surrounding elements 21 as one part without color shading. Embodiments including color codes are shown in FIGS. 11, 12, 14 and 15. FIG. FIG. 11 shows an insert opening ambient element 21 with color identification markings and used with a plurality of colored key plates 18. FIG. 12 shows an insert opening peripheral element 21 used with a plurality of key plates with color identification markings and no color markings. FIG. 14 shows the insert opening peripheral element 21 used with a colored key plate 27 with color identification markings. FIG. 15 shows an insert opening peripheral element 21 used with a key plate with color identification markings and no color markings. Similarly, other color markings can be used. In embodiments, each key plate may also include a tactile feature 37 (see FIGS. 8 and 9) in addition to or instead of coloring. Such features may have letters or numbers to identify which color is associated with a particular key plate. This letter or number may for example be printed, molded, formed, stamped or engraved on the key plate surface. Braille or other tactile characters can also be used. In other embodiments, tactile feature repetitions can be associated with a particular color. For example, a key plate that extends horizontally along the surface of the key plate, a key plate with protruding ridges corresponds to magenta, a series of recessed recesses extending vertically corresponds to cyan, etc. is there.
[0027]
In addition to or instead of attaching a color code to the key plate, a yoke 17 (FIG. 7) places a color-coded label over the appropriate channel 25. It is also possible to indicate which color should be inserted into which channel.
[0028]
FIG. 8 illustrates an embodiment of a color code configuration. The vertical line drawn on the leftmost key plate 18A represents magenta, the horizontal line drawn on the next key plate 18B viewed from the left represents cyan, and the large line drawn on the next key plate 18C viewed from the left. The lattice pattern represents yellow, and the small lattice pattern drawn on the rightmost key plate 18D represents black. The color order may be any order appropriate for a particular printer.
[0029]
In embodiments that are used with a plurality of ink sticks that are substantially identical to each other, there is little or no difference between the openings 24 in the key plate. In these cases, the key plate or yawn color code is particularly useful to prevent accidental insertion of the wrong color ink stick into a particular channel.
[0030]
In other embodiments, such as the embodiment shown in FIGS. 8-17, each key plate 18 or insert opening ambient element 21 has a shape that corresponds (keyed) to the outer edge shape of a particular color ink stick. The insertion opening 24 has The ink stick 2 is inserted into an opening 24 having an appropriate shape at the insertion end of each supply channel. Properly keyed insertion openings can allow for new and improved ink shapes with a family appearance that are easy for the customer to use. In embodiments, the opening may have a recognizable shape that facilitates color slot keying. In embodiments, aperture features that control which ink sticks can enter the channel may be located at the left and right boundaries of the aperture. These embodiments are used for ink sticks with color distinguishing features on their left and right sides, such as 2A to 2D. The front and back sides of the opening may be the same for a particular printer model or series of models. These shapes may be made identical for each keyplate of the model being considered, but are changed for different printer series or models, so that the family appearance of the ink used for each printer model is changed. Can be improved. Alternatively, the ink stick may be designed to have color distinguishing features on the front and back sides in addition to or instead of the left and right sides. The left and right sides may also include model keying features. In these embodiments, the key plates corresponding to these ink sticks have keying features on the front and back sides of the opening. By completely surrounding the insertion opening, it not only helps to allow the four sides of an approximately square or rectangular ink stick to be used for keying, but an ink stick with any number of sides (or It can be keyed (for example, without a side, such as a cylindrical ink stick).
[0031]
In an embodiment, each key plate 18A to 18D also has one or more ink level observation regions 35 disposed between the plate insertion opening 24 and the melting end of the supply channel under the key plate. Prepare. These observation areas 35 allow the user to see the position of the ink stick in the channel, in particular the last ink stick in the channel, so that how many ink sticks 2 remain in the channel 25. Give the user a visual cue to show. The viewing area 35 may be labeled with markings that represent the percent fill of each channel or markings that represent approximately how many prints that contain an average amount of color from the channel. For example, these markings may include numbers. In an embodiment, the observation area may be a window made of a substantially transparent material such as plastic. In other embodiments, the observation area may be an open space and functions as an access opening through the key plate. The access opening allows the user to physically adjust the ink stick or multiple ink sticks in a particular channel. One of the reasons users want to access is clogging resolution. When the ink access cover 20 is opened as shown in FIG. 7, it is easy to evaluate the remaining ink supply amount for all ink stick colors by observing each key plate 18 and the access aperture 35. Become.
[0032]
In an embodiment, as shown in FIGS. 16 and 17, the access opening may also take the form of a further insertion opening 36 on the same channel. These additional insertion openings 36, in addition to forming the viewing area, allow the user to load ink more quickly and allow better access to adjust the ink stick within the supply channel To do.
[0033]
In an embodiment, each supply channel has a channel guide that interacts with an ink stick guide on the ink stick, thereby supporting the ink stick as the ink stick moves along the supply channel. Lead. For example, each key plate may have a guide, such as a rail 28, that extends downward from the lower surface of the key plate into a channel through which the ink stick passes. The guide rail 28 extends out past the boundary between the front face of the chute and the key plate and guides the ink stick towards a melting plate 29 that is mounted a short distance behind the chute channel end. Help. The guide portion 28 of the key plate may function as a support portion for the upper side portion of the ink stick in the channel. For example, the guide part 28 supports the second or upper guide part 8 extending to the right side of the ink stick shown in FIG. The second guide portion 8 of the ink stick generally remains in contact with the guide rail 28 for most of the time that the ink stick 2 moves down the channel 25.
[0034]
Channels 25A through 25D are partially exposed along one side when key plates 18A through 18D are inserted in place. Along this side, a yoke arm 32 (see FIG. 35) extends from the yoke 17 to the channel 25. In order to reduce the possibility of intrusion of external material into the channel and improve the appearance of the upper end surface, the key plate 18 has an extension flange 34 that is inclined upward and sideward, and this flange 34 is connected to the channel. Substantially obstructs the field of view directly below. Flange 34 also helps prevent objects from falling into the channel and interfering with ink supply or yoke movement.
[0035]
Here, referring again to FIG. 7, the ink loading connection portion 30 is attached to the ink access cover 20 and the yoke 17 by a shaft (pivot). When the access cover 20 is raised, the pivot arm 22 (see FIG. 7) pulls the yoke pivot pin 23 (see FIG. 18) and slides the yoke back to the clear position ahead of the ink insertion opening. This allows ink to be inserted into the ink loader through the ink insertion opening (see FIG. 18). The yoke 17 is connected to the chute 9 so that it can slide on the key plate 18 from the back to the front of the chute (towards the melting plate) when the ink access cover is closed. An ink stack push block (discussed below) is connected to the yoke, and the movement of the yoke helps to move the individual ink sticks 2 forward in the supply channel 25 towards the melting plate 29. The hook structure on the yoke 17 allows the yoke 17 to be fitted into the proper position on the channel side flange when the yoke 17 moves beyond the normal travel range. Thereby, even in this forced position, the yoke 17 has a partial overlap and remains in the state of being fastened to the channel flange.
[0036]
In an embodiment, the ink stick and supply channel are made relatively wide to increase the loading density, and the channel floor (bottom) and sides are fitted with a back plate to maintain formability and torsional strength. It is (gusteded). As a result, there is room for the ink stick to be wider (in the direction crossing the supply direction of the supply channel) and thus the length can be shortened (direction along the supply direction of the supply channel).
[0037]
FIG. 19 is an end view of the ink stick loader 16. Each channel 25A to 25D incorporates an ink stick support and guide structure for supporting the ink stick as it moves along the channel 25. The ink stick 2 is shown in one of the supply channels 25A of the ink stick loader and the other supply channel is empty. In an embodiment, each ink stick is supported substantially along two contact lines. The first is the lower ink guide 26. In embodiments, the lower ink guide may be configured as a relatively narrow and elongated recess or valley that allows the lower guide structure of the ink stick to be supported. In other embodiments, the lower ink guide may be in the form of a protruding rail. In these embodiments, the push block may have a concave portion at the bottom instead of the convex portion.
[0038]
The lower ink guide 26 is preferably arranged so as to be shifted toward one side of the channel 25. In the embodiment, the lower guide element portion 7 of the ink stick is at least partially engaged with the lower ink guide 26. In some embodiments, the lower ink guide 26 supports the lower guide element portion 7. In FIG. 19, the lower ink guide 26 is illustrated as a trough with a concave curved bottom, but the specific shape of this guide path was configured to match the appropriate guide structure of the ink stick. Many shapes are possible. These shapes are not limited to those listed here, but include raised small inverted “V” shapes, U-shapes or inverted U-shapes, or other contours with single or multiple vertices and valleys.
[0039]
In the embodiment, the second contact line is between the upper opposite side of the ink stick 2 and the upper guide rail 28 of the key plate. In the embodiment (see FIG. 19), the top of the ink stick 2 has a convex or other ink stick guide periphery 8 that contacts the key plate guide rail 28. The guide rail 28 extends downward from the key plate 18. In the illustrated embodiment, each upper guide rail extends from one side or near a separate key plate into the supply channel space. As shown in FIGS. 9 and 20, the key plate guide rail 28 extends further than the general front portion of the channel 25. This design provides the ink stick 2 with greater stability when the ink stick 2 comes into contact with the melting plate and is melted there to become smaller. The key plate guide rail 28 also helps to accurately place the key plate during assembly of the loader 16. In this configuration, the extended end of the guide rail 28 engages the notch 33 of the upper cross beam of the chute so that the front end of the key plate 18 is properly positioned with respect to the channel.
[0040]
When the channel guide path 26 is located on one side of the center of gravity of the supporting ink stick, the ink stick 2 in which the lower guide element portion 7 engages with the lower guide path 26 is inclined to the opposite side. In an embodiment, the upper guide rail 28 of each key plate 18A-18D provides support on the side near the upper end, opposite the center of gravity of the ink stick from the lower support. As a result of this configuration, there are only two optimized contact lines to support, restrain and direct the direction of the ink towards the melting plate. Thus, better control over the orientation of the ink is obtained and the lower support offset to one side reduces the possibility of contact with small chips and ink particles.
[0041]
Although the upper guide rail 28 has been described as part of an individual key plate 18, such a guide structure can also be formed as part of a single key play 0 used for multiple supply channels. . Please refer to FIGS. Further, instead of configuring the guide rail to extend from the key plate, the guide rail can be configured to extend from the upper wall of the channel 25. The upper and lower channel guides on the chute or on the key plate are also flanges, angular variations of the walls, inset notches or valleys, protruding extensions or rails, or similar used for the total length of the ink supply range It may be in the form of a structure, and may be of any suitable size or configuration that complements or meets the requirements for guiding and / or supporting ink inserted into the channel.
[0042]
The basic double guide structure allows greater flexibility in channel floor design. Refer to FIG. Many of the channel floor areas 45 under each row of ink sticks need not be present to support the ink sticks. Therefore, in the embodiment of the ink loader, the opening 46 or the recess 47 may be formed on the floor. In embodiments, the floor has little or no contact between the ink stick and debris such as small chips and other ink particles that may collect under the feed slot. A recess may be formed to ensure that there is no. In embodiments where the opening is formed in the floor, various types of collection receptacles may be used to collect debris that falls out of the chute.
[0043]
Figures 22 to 25 show several alternative embodiments of supply channels and key plates. FIG. 22 shows an embodiment of a key plate having two raised guide rails. FIG. 23 shows an embodiment of an ink loader in which, in addition to the key plate guide rail, the channel wall has a raised guide rail. FIG. 24 shows an embodiment of a key plate where the channel has two raised guide rails. In the latter embodiment, the key plate need not have a guide rail. FIG. 25 illustrates an embodiment that uses a guide rail located at the base of the ink stick in addition to the guide rail for supporting the top of the ink stick.
[0044]
The ink loader includes a push block 50 for each supply channel 25, thereby moving the ink stick within the respective supply channel to the melting end of the channel. The pressing force of the pressing block is given by a spring. The spring is mounted between the push block and the yoke 17 and moves the push block 50 toward the melting end by moving the yoke toward the melting end.
[0045]
FIG. 26 illustrates one exemplary embodiment of an ink stick push block 50 having a hub mounted spring 54. As shown in FIG. 26, the spring 54 extends from the side surface of the push block.
[0046]
27-29 show an exemplary embodiment of an ink stick push block 50 with the hub 53 removed. In the embodiment shown in FIGS. 27-29, the push block surface 52 of the ink stick push block 50 has a contour that complements the contour of the back of the ink stick loaded in the corresponding channel. Since the front surface and the back surface of the ink stick 2 have a non-planar contour, for example, the surface 52 of the ink stick push block 50 shown in FIG. 27 also has a non-planar contour. However, the push block surface 52 may have any shape that complements the back of the ink stick. For example, when the back surface is flat, the corresponding push block surface is also formed flat. When the back surface has a concave pattern, a convex pattern that complements these concave sections may be formed on the push block.
[0047]
In the embodiment as shown in FIGS. 26 to 29, the boundary of the surface 52 of the push block 50 has substantially the same contour as the front surface of the ink stick 2 and at the same time substantially the back surface of the ink stick 2. Complement to This can happen because the front and back of the ink stick 2 complement each other. However, the front face of each ink stick need not be complementary to the back face of the ink stick. In such an embodiment, the front surface of the ink stick push block need not be the same as the front surface of the ink stick.
[0048]
When the ink stick 2 is inserted into the loader, the ink stick push block 50 is somewhat closely aligned with the last ink stick in the row fed to the melting plate 29. In an embodiment, when the ink stick push block 50 is in its rearmost position for ink insertion, the surface 52 of the ink stick push block 50 protrudes into the space below the keyed opening 24 (its As long as the outer edge is broken, the push block surface 52 can function as part of the insertion keying to prevent incorrect ink stick insertion. In such an embodiment, the surface 52 of the ink stick push block may prevent complete insertion of the ink stick unless the back of the ink stick has a contour that complements the contour of the surface of the ink stick push block. it can. Such insertion keying by the ink stick push block may be in addition to or instead of forming a key shape in the outer side cross section of the opening 24 farthest from the melting plate. In an embodiment, the height of the ink stick is higher than the height of the push block. This allows a keying structure at the bottom of the ink stick that is not present at the top of the ink stick.
[0049]
The embodiment of FIGS. 27-29 is shown for illustrative purposes. The surface 52 of the ink stick push block 50 may be designed to complement various contours on the back of the ink stick.
[0050]
In an embodiment, the ink stick push block 50 is further configured to reduce relative movement between the push block 50 and the last ink stick, and also in the lateral and vertical directions of the push block relative to the supply channel. Configured to reduce movement. In an embodiment, two offset guide tabs (56, 57) protrude from the bottom of the ink stick push block. Both tabs are narrower than the guide slots 58 between the rails and the walls of each channel 25 and fit into it. In an embodiment, the tab is disposed along one side of the push block 50, thereby allowing a portion of the lower portion of the push block 50 to rest on the rail. When the block is loaded with ink, on the opposite side, a torque moment that removes all gaps between the tabs is applied to complement the placement of the block perpendicular to the line of travel. The guide follower 59 extends downward from the ink stick push block in the same manner as the ink stick guide portion 7 from which the ink stick 2 protrudes. The guide follower 59 has a contour that at least partially engages the lower channel ink guide trough 26. Due to the closed boundary and movement of the guide follower in the lower ink guide trough, a state in which no ink particles exist in the guide trough is maintained. The guide follower also ensures that the surface of the ink stick push block is parallel to the surface of the ink so that the proper orientation of the contacting ink stick is maintained.
[0051]
In an embodiment in which the lower channel ink guide 26 is a protruding element such as a protruding rail, the push block guide follower 59 may be a recess in the lower portion of the push block body. The push block guide follower thus formed with a recess may also have a contour that at least partially engages the lower channel ink guide.
[0052]
FIG. 30 illustrates an embodiment of the spring 54 wound around the hub 53. The first end of each spring 54 is constrained by each hub 53, so that the action of extending or retracting the spring rotates the hub. The spring can be constrained in various ways including, but not limited to, adhesives, tab and slot configurations, and stakes. The second end of each spring 54 is fixed to the yoke 17. In an embodiment, the spring is a constant force spring. In the embodiment, the spring has a spring mounting clip 55. The clip 55 engages one of the yoke arms 32 (see FIGS. 20 and 35).
[0053]
The connecting part and the structure of the yoke connect the four independent ink stick pushing blocks 50 </ b> A to 50 </ b> D to the ink stick supply cover 20 through the constant force spring 54. When the yoke 17 and the ink stick push block 50 are separated with the ink stick in between, the spring 54 extends along the side of the supply channel where the push block is located. The spring 54 applies a force to the ink stick in the supply direction through the push block by urging the surface 52 of the ink stick push block 50 toward the contour of the back surface of the ink stick. The gaps between the individual key plates 18 form a path for the extended yoke arm 32 and the arm 32 is connected to a constant force preload spring 54 (see FIG. 35). In embodiments, the spring mounting arm 32 extends a large distance downward to help maintain a straight pull vector for the spring 54. In an embodiment, the arm 32 also has an offset shape so that the arm can avoid the side of the key plate 18 under the elongated flange 34. The portion of each arm 32 within the channel is substantially perpendicular to the upper end of the yoke 17. The arm 32 is positioned at a sufficient distance from the channel wall so that the spring 54 can pass between the arm and the channel wall.
[0054]
The use of springs that extend along the sides of the channel helps to allow the opening 24 to have an outer edge that does not interrupt the key plate 18. Some conventional feeding assemblies use a preloaded spring that extends along the upper end of the channel. In these assemblies, the key plate or portion of the key plate that extends over the channel typically has a slot that extends the entire length of the channel. Such slots have substantially eliminated keying structures on more than two sides of the opening. However, preload springs that extend along the sides of the channel eliminate the need for a slot that extends into the key plate insertion opening or beyond, thereby helping to allow an uninterrupted insertion opening perimeter. .
[0055]
In addition to pulling the ink stick push blocks 50 </ b> A to 50 </ b> D forward, the side springs 54 also act on the top cover 20 and the loading coupling element 30. Lifting the printer ink access cover 20 forces the ink stick push block 50 (shown best in FIG. 26) back to the clear position shown in FIG. Allows insertion through a keyed insertion opening 24 on the front of the push block. Closing the ink access cover 20 causes the yoke to slide forward, so that the spring pulls the push block 50 forward. As a result, a force is applied to the ink stick 2, and the ink stick 2 is supplied to the melting plate 29 as the melting proceeds. The design of the cover and connecting part functions as a cover latch by moving beyond the center against the spring force in the lower position. This design allows automatic access to the ink stick insertion openings 24A to 24D by simply opening and closing the cover 20, applying the necessary spring force to the ink stick 2 and reducing the remaining amount of other colors. Regardless, by allowing the addition of any color ink stick, ink stick replenishment is simplified and made more rapid.
[0056]
FIG. 31 shows an inverted view of the exemplary embodiment of the hub of FIG. 30, in which the spring has been removed. 32 shows a bottom view of the hub shown in FIG. 33 and 34 show cross-sectional views through the hub of FIG.
[0057]
When the printer ink access cover 20 is opened, the cover 20 tends to be rapidly lifted by the spring force between the yoke and the push block. In order to control this movement of the cover 20, friction is intentionally applied to certain parts. Friction is used to convey a smooth and controlled feel to the printer cover 20, thereby helping to keep the cover 20 from opening too quickly.
[0058]
When the loader is full, the ink preload spring 54 exerts a force on the yoke 17, which causes the yoke 17 to slide almost its entire length to its rearmost position as the ink access cover is opened. . This force can cause the door to open due to excessive speed, which can cause damage to the printer, including damage to the hub and push block. Part of the cause of this is that each hub 53 can rotate freely within the push block 50. In an embodiment, damping grease can be added to the small gap between the hub 53 wall and the ink stick push block 50 to prevent the access cover from opening suddenly, increasing the friction between the two parts. .
[0059]
Since this force is applied by a spring, one advantageous location for providing a damping effect is the boundary between the spring hub and the ink stick push block body. Each hub has four needle holes 70 to facilitate the injection of grease into the hub 53. In an embodiment, the hub 53 is then turned upside down and placed on the ink stick push block 50 and the grease is distributed between the wall 64 of the hub 53 and the wall 62 of the ink stick push block 50. The interface is inside the spring hub and away from the spring itself, thereby preventing contamination of the ink or loader with grease. The spring 54 can also be stretched and contracted one or more times to help distribute the grease substantially uniformly.
[0060]
Grease is applied to the inner walls of both the hub and the push block. The damping boundary from the hub to the ink stick push block is provided with a damping fluid displacement and expansion volume between the parts, which allows excess grease to be received and captured. The boundary forms a small gap between the parts and is cut with respect to the overall height, thereby creating a region 68 for receiving and capturing excess grease. In this way, grease volume variations due to component and assembly process variations can be addressed by applying a little more grease than needed to fill the nominal gap, and the device Helps ensure that you have the right amount of grease for optimal performance at any time.
[0061]
To illustrate the configuration of the loader components of the present invention, FIG. 35 shows an enlarged view highlighting the neck and side spring configuration that advances the ink stick push block into contact with the individual ink sticks.
[0062]
Referring now to FIGS. 19, 20, and 36-38, the ink level sensing structure is a flag system having a single flag vane 88, both in the low ink state and in the no ink state. Use a flag system that detects specific ink levels such as An ink level sensing structure is disposed along the supply channel so that a single element identifies two or more ink volume states. In an embodiment, when the position of the push block 50 (which follows the last ink stick in the supply channel) passes a particular point in the supply channel, the push block will cause the sensing structure to be in the supply channel. Triggers the amount of ink detected. In the illustrated embodiment, the ink level sensor is triggered when one of the plurality of ink supply channels reaches a specified ink level condition. The printer may be programmed to display a message on the front panel display screen 31 once an “insufficient” or “ink empty” supply condition is detected in any of the supply channels. Then, the user opens the ink access cover 20 and replenishes the supply channel in the ink shortage or ink empty state. When the ink access cover of the printer is opened, the printer user can physically observe the state of the other ink supply channels and can add ink if necessary.
[0063]
In an embodiment, the ink level sensing structure has a central bar or span 80, a pivot arm 82 having a mounting arrangement 84, and a starting tab 86 that borders the chute 9. The arm 82 extends upward into the space between the channels. The arm 82 branches off at its end to form a mounting arrangement 84. The protruding mounting arrangement 84 connects the arm 82 (and thus also the span 80) to the chute 9. Each start tab 86 extends from each channel 25A to a push block guide slot 58 in 25D. A flag blade 88 that triggers the sensor extends from the span 80. In the embodiment, the extension spring 90 is connected to one end of the flag blade 88. The other end of the spring 90 is attached to the chute 9. The spring 90 biases the flag blade 88 toward the back surface of the chute 9.
[0064]
In embodiments (such as those shown in FIGS. 19, 20 and 36-38), the ink level sensing system uses optical sensors 39 and 40. In an embodiment, these sensors are optical circuit breaker sensors. The sensors 39 and 40 detect ink amount states such as an “ink shortage” supply state and an “ink empty” supply state. Typical sensors that can be used include, for example, the Model J45 Optical Circuit Breaker Sensor (Model J45) from Omron Electronics, Inc. of Schaumburg, Illinois. These sensors include an LED that transmits a signal and a phototransistor that detects a signal from the LED. The opening on the opposing optical device allows the sensor to detect when a non-transparent material has blocked the signal between the LED and the phototransistor.
[0065]
In an alternative embodiment, sensing may be performed by electrical contact engaged by a moving flag. Sensors 39 and 40 may simply be open electrical switches that close as the metal flag blade passes between circuit elements. The sensor may also constitute a simple mechanical switch, which is triggered when the flag blade passes this switch.
[0066]
Sensors 39 and 40 are disposed on an electrical circuit board (ECB) 96. The ECB 96 forms an electrical interface connection to the melting plate and sensor. The EBC 96 is first attached to the shield and then attached to the lower portion of the loader by coupling to the channel with a clasp structure.
[0067]
When the flag is in its first or normal state position (ie, when the ink volume is at the first or normal level before reaching the low ink supply state in any of channels 25A through 25D), the extension spring 90 However, by applying a substantially constant force toward the back of the ink stick loader 9 to the flag blade 88, the flag blade 88 is held in its first or normal position. In embodiments where the sensors 39 and 40 are optical sensors, the backward movement of the blade is limited by the contact between the tab 92 and the sensor 39. In this “normal” position, the hole 94 in the flag blade 88 is substantially aligned with the light path between the LED of the sensor 39 and the phototransistor, as shown in FIG.
[0068]
A guide tab portion 56 of each ink stick push block 50 extends to a push block guide slot 58 at the side of each channel. In a channel where the ink stick level drops below a certain predetermined point and indicates that the amount of ink in the channel has reached a certain amount, this channel's ink stick push block guide tab 56 (see FIG. 26) Contacts one of the start tabs 86 and pushes the start tab forward. When the push block guide tab 56 moves one of the starting tabs 86 forward, the span 80 pivots forward, thereby moving the flag blade 88 forward. When the span moves forward by a short distance (˜1 mm), as shown in FIG. 37, the flag blade 88 has moved so that the hole 94 is not aligned with the optical path between the LED of the sensor 39 and the phototransistor. It becomes. At this time, the flag blade 88 blocks the optical path, and the phototransistor changes. This change in the state of the phototransistor triggers an indicator of ink shortage, and this indicator can be communicated to the user in various ways. In an embodiment, this information is conveyed on the display screen 31. For example, the message may be “insufficient ink” or the like. In the embodiment, the distance between the normal state position and the ink shortage trigger position is in the range of about 0.5 mm to about 1.5 mm. The range depends in part on circuit board, sensor and component durability, and the like.
[0069]
As the ink stick push block 50 continues to move forward, the foremost start tab corresponding to the least amount of ink disposed in the channel continues to be pushed forward. Eventually, when the push block in one feed channel moves far enough towards the melting plate along the feed direction of the feed channel, indicating that the amount of ink has reached the third level, the final In addition, a part of the flag blade 88 blocks the optical path between the LED of the second sensor 40 and the phototransistor as shown in FIG. This triggers a second ink level state, such as a “no ink” state indicator. In the embodiment, this information can be notified on the display screen 31. For example, an ink out condition such as “ink empty” can be displayed on the display screen 31. In embodiments, the printer may also be programmed to stop printing when the ink level of any channel reaches the “no ink” state to avoid damage to the printer. In the embodiment, the range of the distance between the insufficient ink state and the no ink state is about 4 mm to about 7 mm.
[0070]
If one color reaches the “insufficient” point and another color of ink is used, this use may cause the second color to reach an ink shortage condition or to go out of ink before the first color. As long as it is not reached, the displayed ink supply state is not affected. Once a single flag blade 88 is in an ink shortage position, the ink supply status displayed on the panel message window does not change until one of the ink supplies is below the “no ink” threshold. In an embodiment, once one of the ink channels is sufficiently depleted, the “insufficient” supply status signal displayed on the front panel message window 31 changes to “ink empty” or a similar message.
[0071]
Activation of the ink level flag system is facilitated by the interface between the system and the push block guide tabs 56 and 57. The front push block guide tab 57 is shallow and does not contact the starting tab 86. The back tab 56 extends deeper into the guide slot, thereby allowing the ink level flag to be triggered in a range that extends beyond the limit of forward movement of the ink stick push block. Those skilled in the art will know from the above teaching how to change the relative positions of the sensors 39 and 40 and the shape of the flag blade 88 to determine the amount of push block movement between the different ink levels detected by the sensor. You will be able to recognize what will change.
[0072]
In other embodiments, the sensor may be triggered by extension of the push block itself rather than a separate flag system element. See FIGS. 39-41. Each push block 50 includes an arm 60 that extends downward through one side of the channel or through the space between the channels. In this embodiment, each channel of the chute includes a corresponding pair of sensors 39 and 40, respectively. These sensors detect when the push block arm 60 passes.
[0073]
In still other embodiments, a single flag and a single optical sensor can be used. In the embodiment shown in FIGS. 42 to 44, the flag blade 88 includes a translucent portion 110. An optical sensor 112 similar to the sensors 39 and 40 used in the embodiment of FIGS. 36-38 can be used. However, one important difference is that the sensor 112 can be distinguished based on signal strength. As the translucent portion of the flag moves between the transmitter and receiver of sensor 112, the receiver measures the reduced optical signal and triggers an ink shortage indicator. See FIG. 43. Once the non-transparent portion of the flag blade 88 moves between the transmitter and receiver, it triggers a second ink level state, such as an “no ink” state indicator. See FIG. 44. This flag system can be moved by the push block 50 as described above.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating an embodiment of a color printer, showing a state in which a printer upper cover is closed.
FIG. 2 is a plan view illustrating one embodiment of an ink stick.
FIG. 3 is a plan view illustrating one embodiment of an ink stick.
FIG. 4 is a plan view illustrating one embodiment of an ink stick.
FIG. 5 is a plan view illustrating one embodiment of an ink stick.
6 is a front view of an example embodiment of the ink stick shown in FIGS. 2-5. FIG.
FIG. 7 is a partially enlarged plan perspective view of the printer of FIG. 1 with the ink access cover open, showing the solid ink stick in a position to be loaded into a suitable ink stick receptacle.
8 is a plan view illustrating an embodiment of a series of key plates in the printer of FIGS. 1 and 7, wherein the key plate has an insertion opening corresponding to the ink stick shown in FIGS. Indicates.
FIG. 9 is a perspective view showing a key plate shown on the leftmost side in FIG. 8;
10 is a plan view illustrating an embodiment of a series of key plates for the printer of FIGS. 1 and 7. FIG.
11 is a plan view illustrating another embodiment of a series of key plates for the printer of FIGS. 1 and 7; FIG.
12 is a plan view illustrating yet another embodiment of a series of key plates for the printer of FIGS. 1 and 7. FIG.
13 is a plan view illustrating a single key plate embodiment for the printer of FIGS. 1 and 7. FIG.
14 is a plan view illustrating another embodiment of a single key plate for the printer of FIGS. 1 and 7. FIG.
FIG. 15 is a plan view illustrating yet another embodiment of a single key plate for the printer of FIGS. 1 and 7;
16 is a plan view illustrating an embodiment of a series of key plates for the printer of FIGS. 1 and 7. FIG.
17 is a plan view illustrating an embodiment of a single key plate for the printer of FIGS. 1 and 7. FIG.
18 is a perspective view illustrating an embodiment of a supply channel of an ink stick dispenser incorporating the key plate of FIG. 8. FIG.
FIG. 19 is a front end view illustrating the embodiment of the ink stick dispenser of FIG. 18 taken along line 16-16 of FIG.
20 is a schematic side view illustrating an embodiment of a supply channel of an ink stick dispenser along line 17-17 of FIG.
FIG. 21 illustrates an embodiment of a supply channel floor.
FIG. 22 is a schematic end view illustrating another embodiment of a supply channel of an ink stick supply.
FIG. 23 is a schematic end view illustrating another embodiment of a supply channel of an ink stick dispenser.
FIG. 24 is a schematic end view illustrating another embodiment of a supply channel of an ink stick supply.
FIG. 25 is a schematic end view illustrating another embodiment of a supply channel of an ink stick supply.
FIG. 26 is a perspective view illustrating an embodiment of an assembled ink stick pusher having a hub and side springs.
FIG. 27 is a perspective view showing an embodiment of the ink stick pusher of FIG. 26, with the hub and spring removed.
28 is a plan view of the ink stick pusher of FIG. 27. FIG.
29 is a cross-sectional view of the ink stick pusher taken along line 26-26 of FIG. 28. FIG.
30 is a perspective view illustrating an embodiment of a hub and spring for use with the ink stick pusher shown in FIGS. 27-29. FIG.
FIG. 31 is a perspective view illustrating an embodiment of an inverted hub.
32 is a bottom view of the hub of FIG. 31. FIG.
33 is a cross-sectional view taken along line 30-30 in FIG. 32. FIG.
34 is a cross-sectional view taken along line 31-31 of FIG. 32. FIG.
FIG. 35 is an enlarged view showing a part of the structure of FIG. 10, showing a handle and a yoke structure, and showing a side spring structure in which an ink stick push block is advanced and brought into contact with individual ink sticks.
FIG. 36 is a schematic diagram illustrating one embodiment of a flag system, showing a state in which the ink amount is at a first level.
FIG. 37 is a schematic diagram showing one embodiment of a flag system, showing a state in which the ink amount is at a second level.
FIG. 38 is a schematic diagram showing one embodiment of a flag system, showing a state in which the ink amount is at a third level.
FIG. 39 is a schematic diagram showing another embodiment of a flag system, showing a state where the ink amount is at a first level.
FIG. 40 is a schematic diagram showing another embodiment of the flag system, showing a state in which the ink amount is at the second level.
FIG. 41 is a schematic diagram showing another embodiment of the flag system, showing a state in which the ink amount is at a third level.
FIG. 42 is a schematic diagram showing yet another embodiment of the flag system, showing a state in which the ink amount is at the first level.
FIG. 43 is a schematic diagram showing yet another embodiment of the flag system, showing a state where the ink amount is at the second level.
FIG. 44 is a schematic diagram showing yet another embodiment of the flag system, showing a state in which the ink amount is at the third level.
[Explanation of symbols]
2 (2A to 2D) Ink stick, 3 Front face, 4 Back face, 5, 6 Side face, 7 Ink stick guide element part, 8 Ink stick guide peripheral part, 9 Chute, 10 Phase change type printer, 16 Ink stick loader, 18 ( 18A to 18D) Key plate, 19 Key plate receiving part, 20 Ink access cover, 21 Ink stick insertion opening peripheral element, 22 Pivot arm, 23 Pivot pin, 24 (24A to 24D) Ink stick insertion opening, 25 (25A -25D) Supply channel, 26 channel guide rail, 27 key plate, 28 guide rail, 29 melting plate, 30 ink loaded coupling element, 31 display screen, 32 arm, 33 notch, 34 extension flange, 35 ink level observation area, 36 Insertion opening, 37 features, 39, 40 sensors, 45 channel floor area, 46 openings, 47 recesses, 50 (50A-50D) blocks, 52 block faces, 53 hubs, 54 springs, 55 clips, 56, 57 block guide tabs, 58 blocks Guide slot, 59 Guide follower, 60 arm, 62 wall, 64 wall, 68 area, 70 needle hole, 80 span, 82 pivot arm, 84 configuration, 86 start tab, 88 flag blade, 90 extension spring, 92 tab, 94 Hole, 110 translucent part, 112 optical sensor.

Claims (6)

A solid ink loader for supplying a plurality of solid ink sticks in a phase change type ink jet printer, wherein the plurality of solid ink sticks are configured to have a contour that fits between a front surface and a back surface, and a contour that has different side surfaces. that includes a plurality of second ink stick having a plurality of first ink stick and a second perimeter shape having a first perimeter shape,
The solid ink loader
A first supply channel for receiving the plurality of first ink sticks;
A second supply channel for receiving the plurality of second ink sticks;
A first key plate covering at least a part of the first supply channel, the first key plate including a first opening corresponding to the first outer shape;
A second key plate that covers at least a part of the second supply channel and is different from the first key plate and has a second opening corresponding to the second outer shape. Plates,
Including a solid ink loader. The solid ink loader according to claim 1,
The first key plate has a first ink stick color identification marking corresponding to a color of the first ink stick;
A solid ink loader, wherein the second key plate has a second ink stick color identification marking corresponding to the color of the second ink stick. A solid ink supply system that supplies a plurality of types of solid ink sticks in a phase change type ink jet printer, wherein each type of solid ink stick has a contour that fits on the front and the back and a contour that differs on each side. And having a unique shape different from other types of solid ink sticks,
A plurality of supply channels, each supply channel capable of receiving an ink stick;
A plurality of key plates, wherein at least one plate is used for each of the plurality of supply channels, each key plate having at least one insertion opening corresponding to a particular type of solid ink stick shape; ,
Including a solid ink supply system.   4. The solid ink supply system according to claim 3, wherein each key plate has a color identification marking corresponding to a particular solid ink stick color.   5. The solid ink supply system according to claim 4, wherein the color identification marking substantially covers the entire key plate. The solid ink supply system according to claim 5,
The color identification marking includes a plurality of key plate colors;
A solid ink supply system, wherein each of the key plate colors is substantially similar to a particular ink stick color corresponding to the key plate.

Images