Media replacement process for thermal printers
10967660 · 2021-04-06
Assignee
Inventors
Cpc classification
B65H19/123
PERFORMING OPERATIONS; TRANSPORTING
B41J17/32
PERFORMING OPERATIONS; TRANSPORTING
B41J15/042
PERFORMING OPERATIONS; TRANSPORTING
B65H75/2484
PERFORMING OPERATIONS; TRANSPORTING
International classification
B41J17/32
PERFORMING OPERATIONS; TRANSPORTING
B41J33/00
PERFORMING OPERATIONS; TRANSPORTING
B65H19/12
PERFORMING OPERATIONS; TRANSPORTING
B65H75/24
PERFORMING OPERATIONS; TRANSPORTING
B41J15/04
PERFORMING OPERATIONS; TRANSPORTING
Abstract
The present invention embraces a method and apparatus for improving ribbon replacement for thermal printers. The present invention also applies to replacement of other media in associated printers. The improvement is achieved based a ribbon adapter or media adapter that is designed for two conditions: 1) catch condition for printing, and 2) release condition for replacing the media in the printer. By a single click or press of a button, a user can switch between the two conditions. The printing operation occurs during the catch condition. The catch condition ensures that there is no or little relative movement between media core and media adapter. The media adapter can also support different diameter media cores. The release condition is implemented when the user replaces media. The release condition can provide a relatively easy replacement of a media without a significant force or pressure.
Claims
1. A method, comprising steps of: activating a release condition with a press of a button on a media adapter of a printer, wherein the media adapter comprises a push rod, a catcher, and a spring, wherein the catcher comprises a plurality of claws; removing a media core from the media adapter; loading a spool of media on the media adapter; activating a catch condition with another press of the button on the media adapter; and printing utilizing the spool of media, wherein, the push rod comprises wedge structures.
2. The method as in claim 1, wherein, each press of the button of the media adapter causes the media adapter to switch from the catch condition to the release condition, or vice-versa.
3. The method as in claim 1, wherein, the activation of the release condition causes the plurality of claws of the catcher to retract inward.
4. The method as in claim 1, wherein, the activation of the catch condition causes the plurality of claws of the catcher to push outward.
5. The method as in claim 1, wherein, each press of the button on the media adapter causes a forward or backward movement of the button and the push rod and causes a clockwise or counterclockwise rotation of the push rod based on a wedge-shaped force between the button and the push rod.
6. The method as in claim 1, wherein, when the spool of media is depleted from media supply spindle, re-activate release condition.
7. The method as in claim 1, wherein, on a thermal printer, a media takeup spindle is the media adapter.
8. The method as in claim 1, wherein on a thermal printer, a media supply spindle is the media adapter.
9. A media adapter, comprising: a cylindrical button with one or more force points at one end of the cylindrical button; a cylindrical push rod with a plurality of wedge-shaped edges at one end of the cylindrical push rod and a pointed shaped at another end of the cylindrical push rod; a cylindrical catcher comprising a plurality of claws; and a spring positioned inside of the cylindrical catcher, wherein, a press of the cylindrical button causes the plurality of claws of the cylindrical catcher to push outward or to retract inward.
10. The media adapter as in claim 9, wherein, the one or more force points at one end of the cylindrical button are positioned to interface with the plurality of wedge-shaped edges at one end of the cylindrical push rod.
11. The media adapter as in claim 9, wherein, the pointed shaped at the another end of the cylindrical push rod is positioned inside the cylindrical catcher and the spring.
12. The media adapter as in claim 9, wherein, when the plurality of claws of the cylindrical catcher are pushed outward, the plurality of claws catch a surface of a media core to secure a position of the media adapter relative to the media core.
13. The media adapter as in claim 9, wherein, when the plurality of claws of the cylindrical catcher are retracted inward, the plurality of claws release a surface of a media core to allow the media core to be removed from the media adapter.
14. The media adapter as in claim 9, wherein, each press of the cylindrical button causes a forward or backward movement of the cylindrical button and the cylindrical push rod and causes a clockwise or counterclockwise rotation of the cylindrical push rod based on a wedge-shaped force between the one or more force points at one end of the cylindrical button and plurality of wedge-shaped edges at one end of the cylindrical push rod.
15. The media adapter as in claim 9, wherein, each press of the cylindrical button causes the media adapter to switch from a catch condition where the plurality of claws are pushed outward, to a release condition where the plurality of claws are retracted inward, or vice-versa.
16. A printer comprising: a cylindrical button, which is incorporated in a media adapter of the printer, comprises one or more force points at one end of the cylindrical button, wherein, a press of the cylindrical button causes a plurality of claws of a cylindrical catcher to push outward or to retract inward, and wherein, the one or more force points at one end of the cylindrical button are positioned to interface with a plurality of wedge-shaped edges at one end of a cylindrical push rod.
17. The printer as in claim 16, wherein, each press of the cylindrical button causes a forward or backward movement of the cylindrical button and the cylindrical push rod and causes a clockwise or counterclockwise rotation of the cylindrical push rod based on a wedge-shaped force between the one or more force points at one end of the cylindrical button and plurality of wedge-shaped edges at one end of the cylindrical push rod.
18. The printer as in claim 16, wherein, each press of the cylindrical button causes the media adapter to switch from a catch condition where the plurality of claws are pushed outward, to a release condition where the plurality of claws are retracted inward, or vice-versa.
19. The printer as in claim 18, wherein, when the plurality of claws of the cylindrical catcher are pushed outward, the plurality of claws catch a surface of a media core to secure a position of the media adapter relative to the media core.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
(16) The present invention, as described in this Specification, is based on applications supporting thermal transfer ribbon. However, the present invention is not limited to applications supporting thermal transfer ribbon, but may also be applied to other media including, but not limited to, paper, labels, and tickets. In other words, the present invention applies to replacement of other media in associated printers.
(17) The present invention embraces a method and apparatus for improving ribbon replacement for thermal printers. The improvement is achieved based a ribbon adapter designed for two conditions: 1) catch condition for printing, and 2) release condition for replacing the ribbon in the printer. By a single click or press of a button, a user can switch between the two conditions. The printing operation occurs during the catch condition. The catch condition ensures that there is no or little relative movement between ribbon core and ribbon adapter. The ribbon adapter can also support different diameter ribbon cores. The release condition is implemented when the user replaces the ribbon. The release condition may make it relatively easy to replace the ribbon without a significant force or pressure. Hence, in the present invention, each press of the button of the ribbon adapter causes the ribbon adapter to switch from the catch condition to the release condition, or vice-versa.
(18) A thermal printer can have two ribbon adapters, i.e., one for a ribbon supply (or ribbon supply spindle) and another for a ribbon takeup (or ribbon takeup spindle). The ribbon adapter comprises a combination of wedge and spring structures.
(19) When used as a ribbon supply, the ribbon adapter holds a spool of ribbon that is wrapped around a ribbon core. The ribbon adapter is designed to toggle between the two conditions by pressing a button: Catch condition and Release condition. The ribbon adapter is designed in such a way that when the button is pressed, the claws of a catcher component of the ribbon adapter are pushes outward to firmly hold the ribbon core. The catch condition creates an interference fit between the ribbon adapter and the ribbon core.
(20) When the button is pressed again, the ribbon adapter changes to a release condition, where the push rod moves to original position by the spring so that claws are retracted in to the adapter, thus, creating a clearance fit to make it easier to remove the ribbon core.
(21) In a current printer design, e.g., a Honeywell PM43 thermal printer, the ribbon core and the ribbon adapter are always an interference fit. This means there are always pressures between the ribbon core and ribbon adapter. In the present invention, with a release condition, the ribbon core and ribbon adapter have minimal contact with each other, so the sliding wear condition is minimized. Sliding wear occurs when the two parts have relative motion and when they contact each other creating pressure between the two parts.
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(24) Since the ribbon core 152 is installed on ribbon adapter 151 multiple times, reciprocating sliding wear can result for both ribbon core 152 and ribbon adapter 151. This wear condition can cause an imperfect catch to ribbon core 152. Hence, the imperfect catch can affect the synchronism between the ribbon core 152 and the ribbon adapter 151. The printing quality can be negatively impacted. For example, while rotating at the same time, a wear condition can allow ribbon adapter 151 to rotate 360 degrees, but can only allow ribbon core 152 to rotate 350 degrees. The printer may only have a small tolerance (e.g., 2 degrees) to accommodate this issue so poor quality printing can result.
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(26) Catcher 208 comprising a plurality of claws 210 depending on the application. The pointed shape at the other end of the PUSH_ROD 204 is positioned inside the catcher and the spring as illustrated in
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(30) Release condition: Remove ribbon core 212. Insert or load a new spool of ribbon on ribbon core 212 onto ribbon adapter 216. Ribbon adapter 216 can be ribbon supply 104 (step 302)
(31) Switch Process 1: In order to secure the ribbon core 212 in the ribbon adapter 216, activate catch condition with a press on button 202. (step 304)
(32) Catch condition: Secure a new spool of ribbon on ribbon core 212 in ribbon adapter 216. (step 306)
(33) Print utilizing the new spool of ribbon on ribbon core 212. (step 307)
(34) Switch process 2: When the spool of ribbon is empty or depleted of ribbon, activate release condition with a press of button 202. (step 308)
(35) Repeat step 302-307 to replace the ribbon core 212 and print.
(36) The ribbon adapter 216 can be used as a ribbon takeup 102 to cycle between a release condition and a catch.
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(38) As illustrated in
(39) In summary, when claws 410 of catcher 408 are retracted inward, claws 410 release the surface of ribbon core 412 to allow the ribbon core 412 to be removed from the ribbon adapter 416 with little sliding friction.
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(41) The steps of switch process 1 include: 1) Press Button 502 in Direction B. 2) Button 502 pushes the PUSH_ROD 504 in Direction B. Because of wedge-shape force, PUSH_ROD 504 rotates in a clockwise or counterclockwise direction dependent on the wedge-shaped force between the button 502 and the PUSH_ROD 504. When the PUSH_ROD 504 reaches the position illustrated in pic 1, the PUSH_ROD 504 is not limited by the pipe 501 surfaces, so PUSH_ROD 504 can rotate. 3) Spring 506's force causes PUSH_ROD 504 to move in Direction A while rotating. Rotation is stopped by the surfaces which are inside of the pipe 501 as illustrated in pic 2—catch condition.
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(43) 1.1 The triangle 542 gets Force A, then comes in contact with the triangle 544. The connect point is the force point for both the two parts. For the triangle 544, perpendicular to the wedge-shape, there is a Force T. Per embodiment 540, button 502's end is the force point (or points) and Push_Rod 504's end is wedge-shaped.
(44) 1.2 Force T comprises Force R and Force F. In the present invention, one can determine these two directions as pic direction of the arrow.
(45) 1.3 Force F guides the triangle 544 to move in the F direction. The triangle 544 moves to the +F or −F based on whether the Force F is positive or negative (e.g. In
(46) 1.4 Force R guides the triangle 544 to move in the R direction. The triangle 544 move to the +R or −R based on whether the Force R is positive or negative. (e.g. rotate clockwise or counterclockwise) Per embodiment 540, rotate clockwise or counterclockwise until the surfaces of PUSH_ROD 504 meet the surfaces of pipe 501, then PUSH_ROD 504 will be stopped.
(47) On the other hand, the process for triangle 542 is described below:
(48) 2.1 When the triangle 544 receives Force T, the triangle 542 receives a counterforce, Force T′.
(49) 2.2 Force T′ comprises Force R′ and Force F′. In the present invention, one can determine these two directions as pic direction of the arrow.
(50) 2.3 Force F′ guides the triangle 544 to move in the F′ direction. The triangle 544 moves to the +F′ or −F′ based on whether the Force F′ is positive or negative (e.g. in
(51) 2.4 Force R′ guides the triangle 544 to move in the R′ direction. The triangle 544 moves to the +R′ or −R′ based on whether the Force R′ is positive or negative (e.g. in the present invention, rotate clockwise or counterclockwise). Per embodiment 540, because the surfaces of button 502 always meet the surfaces of pipe 501, button 502 cannot rotate.
(52) Embodiment 540 illustrates the wedge-shaped action between button 502 and PUSH_ROD 504. Each press of button 502 on the ribbon adapter 520 causes a forward or backward movement of button 502 and PUSH_ROD 504 (Direction B and A). Also, when there is a press of button 502, causing Force A to be applied to PUSH_ROD 504, PUSH_ROD 504 rotates clockwise or counterclockwise because of the wedge-shaped power. In other words, each press of the button 502 on the ribbon adapter 520 causes a clockwise or counterclockwise rotation based on a wedge-shaped force between the button and the push rod. Each press of the cylindrical button also causes the forward or backward movement of button 202 and PUSH_ROD 504 (Direction B and A). The wedge-shaped force is a force point that exerts a force upon a wedge-shape. Button 552's end is the force point (or points) and PUSH_ROD 504's end comprises wedge-shapes. In other words, the one or more force points at one end of the cylindrical button are positioned to interface with the plurality of wedge-shaped edges at one end of the cylindrical PUSH_ROD 504.
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(55) As illustrated, the PUSH_ROD 604 is positioned in direction B and the slope of PUSH_ROD 604 pushes the claws 610 outward. This action causes an interference fit between ribbon adapter 616 and ribbon core 612, such that the ribbon core 612 is caught by ribbon adapter 616 very tightly. As there is no more sliding wear to the ribbon adapter 616, the ribbon adapter 616 can maintain its original design strength when catching the ribbon core 612 during printing. The ribbon adapter 616 can also support different diameter Ribbon Cores (0.5″, 1″ . . . ).
(56) In summary, when claws 610 of catcher 608 are pushed outward, claws 610 catch a surface of a ribbon core 612 to secure the position of the ribbon adapter 616 relative to ribbon core 612.
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(58) Switch process 2 can be implemented with the following steps: 1) Press Button 702 in Direction B. This action can be a single-click of button 702. 2) Button 702 pushes the PUSH_ROD 704 in Direction B. Because of wedge-shape force, PUSH_ROD 704 rotates in a clockwise or counterclockwise direction dependent on the wedge-shaped force between the button 702 and the PUSH_ROD 704. When the PUSH_ROD 704 reaches the position illustrated in pic 3, the PUSH_ROD 704 is not limited by of pipe 701 surfaces, so PUSH_ROD 704 can rotate. 3) Spring 706's force causes PUSH_ROD 704 to move in Direction A while rotating. Rotation is stopped by the surfaces which are inside of pipe 701 as illustrated in pic 4, but PUSH_ROD 704 continues to move in Direction A. When PUSH_ROD 704 meets the pipe's corner, PUSH_ROD 704 stops moving in Direction A as illustrated in pic 5—release condition.
(59) Thermal transfer printing is a digital printing process by melting a coating of ribbon so that it stays glued to the material on which the print is applied. It contrasts with direct thermal printing where no ribbon is present in the process.
(60) To supplement the present disclosure, this application incorporates entirely by reference the following commonly assigned patents, patent application publications, and patent applications:
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U.S. Patent Application Publication No. 2015/0069130;
U.S. Patent Application Publication No. 2015/0071819;
U.S. Patent Application Publication No. 2015/0083800;
U.S. Patent Application Publication No. 2015/0086114;
U.S. Patent Application Publication No. 2015/0088522;
U.S. Patent Application Publication No. 2015/0096872;
U.S. Patent Application Publication No. 2015/0099557;
U.S. Patent Application Publication No. 2015/0100196;
U.S. Patent Application Publication No. 2015/0102109;
U.S. Patent Application Publication No. 2015/0115035;
U.S. Patent Application Publication No. 2015/0127791;
U.S. Patent Application Publication No. 2015/0128116;
U.S. Patent Application Publication No. 2015/0129659;
U.S. Patent Application Publication No. 2015/0133047;
U.S. Patent Application Publication No. 2015/0134470;
U.S. Patent Application Publication No. 2015/0136851;
U.S. Patent Application Publication No. 2015/0136854;
U.S. Patent Application Publication No. 2015/0142492;
U.S. Patent Application Publication No. 2015/0144692;
U.S. Patent Application Publication No. 2015/0144698;
U.S. Patent Application Publication No. 2015/0144701;
U.S. Patent Application Publication No. 2015/0149946;
U.S. Patent Application Publication No. 2015/0161429;
U.S. Patent Application Publication No. 2015/0169925;
U.S. Patent Application Publication No. 2015/0169929;
U.S. Patent Application Publication No. 2015/0178523;
U.S. Patent Application Publication No. 2015/0178534;
U.S. Patent Application Publication No. 2015/0178535;
U.S. Patent Application Publication No. 2015/0178536;
U.S. Patent Application Publication No. 2015/0178537;
U.S. Patent Application Publication No. 2015/0181093;
U.S. Patent Application Publication No. 2015/0181109;
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(62) In the specification and/or figures, typical embodiments of the invention have been disclosed. The present invention is not limited to such exemplary embodiments. The use of the term “and/or” includes any and all combinations of one or more of the associated listed items. The figures are schematic representations and so are not necessarily drawn to scale. Unless otherwise noted, specific terms have been used in a generic and descriptive sense and not for purposes of limitation.