WO2024076340A1

WO2024076340A1 - Print reservoir manifolds

Info

Publication number: WO2024076340A1
Application number: PCT/US2022/045746
Authority: WO
Inventors: Paul Allan OSBORNE; Russell Sterling SAUER
Original assignee: Hewlett-Packard Development Company, L.P.
Priority date: 2022-10-05
Filing date: 2022-10-05
Publication date: 2024-04-11

Abstract

The disclosure describes a device that includes: a print substance reservoir (202), a first port (212) of the print substance reservoir coupled to an input of a pump (218) to provide a print substance to the pump, a manifold (224) coupled to an output of the pump to receive the print substance from the pump, a second port (219) of the print substance reservoir to receive a first portion of the print substance from the manifold, and a print head (228) to receive a second portion of the print substance from the manifold.

Description

PRINT RESERVOIR MANIFOLDS Background

[0001] A printing device can deposit a print substance on to print media to generate images on the print media, to some examples, the printing device utilizes a reservoir to store a print substance to be utilized to generate the images on the print media. In these examples, the reservoir can be connected to a print head assembly to deposit the print substance on to the print media to generate the images on the print media. In some examples, the reservoir can be a refillable reservoir such that additional print substance can be added to the reservoir through a port.

Brief Description of the Drawings

[0002] Fig. 1 illustrates an example device that includes a reservoir and a pump that can be utilized with a manifold.

[0003] Fig. 2 illustrates an example device that includes a reservoir with a pump and a manifold.

[0004] Fig. 3 illustrates an example device that includes a plurality of reservoirs with a plurality of pumps and a manifold.

Detailed Description

[0005] A printing device can receive digital data from a computing device to be utilized to generate physical representations of the digital data on a substrate. A printing device includes a device that can deposit a print substance on to a substrate or print medium to generate an image on the substrate. A substrate can include a material that can receive a print substance to generate a permanent or semipermanent image on the material (e.g., paper, plastic, metal, etc.). In some examples, the printing device can include an inkjet printing device that can deposit an ink substance on a substrate to generate an image on the substrate.

[0006] In some examples, the printing device can include a print substance reservoir that can be utilized to store a print substance that can be utilized by a print head to deposit the print substance on the substrate or print medium. As used herein, a print substance reservoir is an enclosure that can store a print substance. In addition, as used herein, a print head can be a system, mechanism, and/or device that can deposit the print substance from the print substance reservoir on to the substrate at particular locations to generate the image on the substrate.

[0007] In some examples, the print substance reservoir can be a refillable print substance reservoir. As used herein, a refillable print substance reservoir is a print substance reservoir that includes a port for adding additional print substance to the print substance reservoir. In this way, a print substance container that includes additional print substance can be coupled to the port of the print substance reservoir to transfer the additional print substance to the print substance reservoir, in some examples, the refillable print substance reservoir includes a refill port to receive a removable print substance container that can be installed and removed from the refill portion without impacting operation of the print head. That is, the print head can continue to function while the removable print substance container is adding print substance to the refillable print substance reservoir. In these examples, gas can be transferred into the print substance reservoir during the addition of the print substance from the print substance container into the print substance reservoir. The gas can include, but is not limited to, ambient air or a combination of gasses that can be transferred from an exterior of the print substance reservoir and/or from the print substance container.

[0008] In some examples, the gas that is transmitted into the print substance reservoir can cause problems to devices within the printing device. For example, a gas that is transmitted into the print substance reservoir can be received at print head of the printing device. In this example, the gas can damage the functions of the print head or decrease a print quality of the images generated by the print head. In these examples, the print head can be designed to receive a constant or substantially constant flow of print substance to function according to manufacturing specifications.

[0009] The print substance within the print substance reservoir can separate within the print substance reservoir. As used herein, separation of the print substance includes a separation of a solution or mixture into a plurality of independent solutions, mixtures, compounds. For example, the print substance can be a solution that includes two mixtures. In this example, the separation of the print substance can result in the two mixtures being more separated compared to the solution. In these examples, the separation of the print substance can result in damage to the print head and/or a decrease in print quality when the print substance is deposited on to the print medium.

[0010] The present disclosure relates to print reservoir manifolds. The print substance reservoirs can be coupled to a pump to remove print substance from the print substance reservoir. The print substance from the pump can be provided to the print reservoir manifold. The manifold can include a first output to provide the print substance to a particular print head and a second output to provide print substance back into the print substance reservoir. In this way, gas that enters the print substance reservoir can be extracted by the manifold and returned to the print substance reservoir through the second output. In addition, the print substance and gas returned to the print substance reservoir can be utilized to mix the print substance within the print substance reservoir to prevent separation of the print substance.

[0011] Fig. 1 illustrates an example device 100 that includes a reservoir 102 and a pump 118 that can be utilized with a manifold (not illustrated). The device 100 can be part of a printing device and/or a printing system to deposit a print substance on to a substrate. For example, the device 100 can be part of a print engine of a printing device. The print engine can be a location within the printing device where the print substance is deposited on to a print medium.

[0012] As described herein, the device 100 can include a reservoir 102 (e.g., print substance reservoir, liquid reservoir, ink reservoir, etc.) that can be utilized to store a print substance that can be utilized by a print head of the printing device. In some examples, the reservoir 102 can be a refillable print substance reservoir that can receive additional print substance from a print substance container that can be coupled to the reservoir 102. In some examples, the reservoir 102 can be one of a plurality of reservoirs of the printing device. For example, the reservoir 102 can be a print substance reservoir for a particular color print substance utilized by the printing device. In this example, the printing device can include a plurality of additional print substance reservoirs that can include corresponding print substance colors such that the printing device can utilize a plurality of different print substance colors deposited by a corresponding plurality of print heads. [0013] The device 100 can include a fill port 106. As used herein, a fill port 106 can include a device that can be coupled to a print substance container to allow the print substance from the print substance container to be deposited in the reservoir 102. In some examples, the fill port 106 can include a coupling mechanism to connect the print substance container to the reservoir 102 and allow the print substance to be transferred from the print substance container in to the reservoir 102. In this way, the fill port 106 can be a device to allow the reservoir 102 to be a refillable print substance reservoir.

[0014] As described herein, the fill port 106 can allow external gas (e.g., gas that is not internal or within the reservoir 102, etc.) to enter the interior of the reservoir 102 when the print substance container transfers the additional print substance into the reservoir 102. In some examples, the device 100 includes a vent 108. The vent 108 can allow gas within the reservoir 102 to escape the interior of the reservoir 102 to an area outside the reservoir 102. In this way, a gas that enters the interior of the reservoir can be released through the vent 108 to prevent the gas from being provided to a print head. However, as described herein, the vent 108 may not be capable of preventing all gas from entering a print substance line and entering the print head.

[0015] The device 100 can include a base 110. The base 110 can be a bottom portion of the reservoir 102. In some examples, the base 110 can be an angled base to direct print substance to an output port 112 of the reservoir 102. In this way, the print substance within the reservoir 102 can be directed toward the output port 112 or a side of the reservoir 102 that includes the output port 112. In this way, the print substance is forced to flow in the direction of the output port 112 to prevent gas within the reservoir 102 to enter the output port 112 when the quantity of print substance within the reservoir 102 is below a threshold level. In some examples, the arrow 109 can illustrate the direction that the print substance is forced due to the angle of the base 110.

[0016] In some examples, the device 100 includes a print substance quantity detector. The print substance quantity detector can be utilized to determine a quantity of print substance within the reservoir 102. In some examples, the print substance quantity detector can be a plurality of sensor pins 111-1, 111-2, 111-N. In some examples, the plurality of sensor pins 111-1, 111-2, 111-N can include a first pin to provide a signal into the print substance and a second pin or plurality of pins to measure the signal to determine a height of the print substance within the reservoir 102. For example, the sensor pin 111-1 can provide a signal into the print substance and the sensor pin 111-2 can measure the signal generated by the sensor pin 111-1 to determine a height of the print substance within the reservoir. In this way, the height can be utilized to calculate the quantity of print substance within the reservoir 102 when the dimensions of the reservoir 102 are known.

[0017] In some examples, the output port 112 can be coupled to a first print substance line 114 that is coupled to an input of a pump 118. As used herein, the pump 118 can be a device or system that forces a fluid to move through a print substance line such as the first print substance line 114 and/or a second print substance line 116. For example, the pump 118 can generate pressure by creating a vacuum that can force the print substance within the reservoir 102 through the output port 112 into the first print substance line 114 to an input of the pump 118. In addition, the pressure generated by the pump 118 can force the print substance through an output of the pump 118.

[0018] As described further herein, the output of the pump 118 can be coupled to a manifold. The manifold can direct a first portion of the print substance from the pump 118 to a print head and a second portion of the print substance from the pump

118 to the second print substance line 116. In addition, the manifold can separate gas from the print substance received by the pump 118 and direct the gas to the second print substance line 116.

[0019] The second print substance line 116 can be a return line that is connected to an output of the manifold. In these examples, the second print substance line 116 can be connected to an output of the manifold and a return port

119 of the reservoir 102. In some examples, the return port 119 can be positioned between the vent 108 and the output port 112 of the reservoir 102. For example, the output port 112 can be positioned relatively closer to the base 110 than the return port 119. In this way, the print substance and gas provided to the return port 119 may not be directed into the output port 112 of the reservoir and return to the pump 118 without further mixing with the print substance within the reservoir 102.

[0020] In some examples, the return port 119 can include or be coupled to a dispersion device 120. The dispersion device can be utilized to increase a pressure between the return port 119 and the manifold before allowing print substance and/or gas from the second print substance line 116 to enter the reservoir 102. In some examples, the dispersion device 120 can be a pressure reiease valve that allows print substance and/or gas to enter the reservoir when the pressure at the dispersion device exceeds a pressure threshold. In this way, the pump 118 can provide a quantity of pressure to the second print substance line 116 such that the pressure at the dispersion device 120 exceeds the pressure threshold such that the print substance and/or gas within the second print substance line 116 enters the reservoir 102 through the return port 119.

[0021] In some examples, the dispersion device 120 can provide the print substance and/or gas from the second print substance line 116 at a pressure that mixes the print substance within the reservoir 102. As described herein, the print substance within the reservoir 102 can separate into distinct mixtures that can damage a print head and/or decrease print quality. In this way, the dispersion device 120 can mix the print substance to prevent the separation and/or remix the separated mixtures to be a more uniform solution of print substance within the reservoir 102. In this way, the dispersion device 120 can be utilized to simultaneously be a pressure release valve for the second print substance line 116 and be a mixing device for the print substance within the reservoir 102.

[0022] In some examples, the angle of the base 110 can direct the print substance that is provided from the dispersion device 120 toward the output port 112. In this way, a mixing path can be generated from the return port 119 on a first side (e.g., right side as illustrated in Fig. 1) of the reservoir 102 to a second side (e.g., left side as illustrated in Fig. 1) of the reservoir 102 and back to the first side to the output port 112. In addition, the gas that is provided to the return port 119 can escape the print substance and exit the reservoir 102 through the vent 108 when the print substance is mixing through the mixing path. That is, the mixing path can prevent gas from being trapped under a surface of the print substance and provided to the output port 112.

[0023] Fig. 2 illustrates an example device 200 that includes a print reservoir 202 with a pump 218 and a manifold 224. In some examples, the device 200 can include the same or similar elements as device 100 as illustrated in Fig. 1. For example, the device 200 can be part of a printing device and/or printing system. In some examples, the device 200 includes a reservoir 202 that includes a fill port 206 and a vent 208. In addition, the reservoir 202 can include a base 210 that is angled to direct print substance within the reservoir 202 toward an output port 212. As described herein, the print substance within the reservoir 202 can be provided to a print head 228 through a plurality of print lines (e.g., print line 214, print line 222, print line 226, etc ).

[0024] In some examples, the device 200 includes a pump 218 between the print lines that connect the print reservoir 202 and the print head 228. That is, the pump 218 can increase a pressure of the print substance within the print lines. In some examples, the device 200 can include a manifold 224 coupled to an output of the pump 218. That is the pump 218 can extract print substance from the output port 212 of the reservoir 202 through a first print line 214 and provide the print substance to the manifold 224 through a manifold print line 222. In some examples, the manifold print line 222 is a connection between an output of the pump 218 and an input of the manifold 224.

[0025] In some examples, the manifold 224 can include pressure release values to control the output pressure of the print substance provided by the pump 218. For example, the manifold 224 can receive print substance from the pump 218 at a first pressure. In this example, the manifold 224 can alter the first pressure of the print substance to a second pressure that is provided to a print head line 226 coupled to a print head 228. In some examples, the first pressure can be greater than the second pressure. In some examples, the second pressure can be based on a manufacturer input pressure for the print head 228. That is, the print head 228 can be designed to receive print substance at a particular pressure. In this way, the manifold 224 can provide the print substance to the print head 228 at the particular pressure even when the pump 218 provides the print substance to the manifold 224 at a different pressure than the particular pressure designated for the print head 228. [0026] In some examples, the manifold 224 can include a first output coupled to the print head line 226 and a second output coupled to second print line 216. As described herein, the second print line 216 can be coupled to a return port 219 such that a portion of the print substance that is provided to the manifold 224 is returned to the reservoir 202. As described herein, the manifold 224 can include a gas separation mechanism to remove gas from the print substance received from the pump 218. The removed gas can be directed into the second print line 216 and returned to the reservoir 202. In this way, the manifold 224 can prevent gas from reaching the print head 228. As described herein, the gas enter the reservoir 202 through the fill port 206 and be provided to the manifold 224 through the increased pressure generated by the pump 218. In this way, the vent 208 may not be able to remove the gas from the interior of the reservoir 202 and/or prevent the gas from entering the first print line 214.

[0027] As described herein, the device 200 can include a dispersion device 220. The dispersion device 220 can include a pressure release valve that can be utilized to increase a pressure of print substance within the second print line 216. For example, the dispersion device can prevent the flow of print substance until the pressure at the dispersion device 220 reaches a threshold pressure level. Once the print substance within the second print line 216 reaches or exceeds the threshold pressure level, the dispersion device 220 can allow the print substance to enter the reservoir 202. In this way, the print substance that is received through the return port 219 can be at a particular pressure such that the print substance and/or gas provided through the return port 219 can be utilized to mix the print substance within the reservoir 202. When the pressure of the print substance and/or gas is provided through the return port 219 at a relatively low pressure, the received print substance and/or gas may not have enough pressure to mix the print substance currently within the reservoir 202. In this way, the dispersion device 220 can be utilized to increase the pressure of the print substance and/or gas to mix the print substance within the reservoir 202.

[0028] In some examples, the dispersion device 220 can be directed toward an interior surface of the base 210 to ensure that print substance located near or proximate to the base 210 is moved or mixed by the print substance provided through the return port 219. In some examples, the pressure release valve of the dispersion device 220 can increase the pressure of the print substance and/or gas that is provided into the reservoir 202 such that the print substance and/or gas reaches an opposite side of the reservoir 202.

[0029] For example, the dispersion device 220 can be positioned on a right side of the reservoir 202 and utilized to provide pressurized print substance and/or gas that can interact with left side of the reservoir 202. In this way, the pressurized print substance and/or gas can be utilized to move the print substance within the reservoir 202 to help mix the print substance within the reservoir. Furthermore, the movement of the print substance within the reservoir 202 can help gas that is trapped under a surface of the print substance to be released from the print substance and released through the vent 208 to an exterior area of the reservoir 202 and less likely to be passed through the output port 212.

[0030] In a specific example, the device 200 that includes: a print substance reservoir 202, a first port (e.g., output port 212, etc.) of the print substance reservoir 202 coupled to an input of a pump 218 to provide a print substance to the pump 218, a manifold 224 coupled to an output of the pump 218 to receive the print substance from the pump 218, a second port (e.g., return port 219, etc.) of the print substance reservoir 202 to receive a first portion of the print substance from the manifold 224, and a print head 228 to receive a second portion of the print substance from the manifold 224.

[0031] In these examples, the second port (e.g., return port 219) is positioned above the first port (e.g., output port 212). As described herein, the manifold 224 can separate a gas from print substance received from the pump 218. In these examples, the manifold 224 can direct gas to the second port (e.g., return port 219). For example, the manifold 224 can separate the gas from the print substance and divert or direct the gas into the second print line 216. In these examples, the vent 208 can allow a gas or the gas received at the return port 219 to be released from an interior portion of the print substance reservoir 202.

[0032] In a specific example, the device 200 can be a printing device that can include a print substance reservoir 202 to store a print substance to be utilized by a print head 228 and an input port (e.g., fill port 206) coupled to the print substance reservoir 202 to receive additional print substance from a print substance container (not shown). In this example, the device 200 includes an extraction port (e.g., output port 212) coupled to the print substance reservoir 202 to provide the print substance to an input of a pump 218 and a manifold 224 to receive the print substance from the pump 218. In these examples, the manifold 224 is to separate a gas out of the received print substance. Furthermore, the device 200 includes the print head 228 to receive a first portion of the print substance from the manifold 224 and a recirculation port (e.g., return port 219 and/or dispersion device 220) coupled to the print substance reservoir 202 to receive a second portion of the print substance and the gas from the manifold 224.

[0033] In this specific example, the pump 218 provides the print substance to the manifold 224 at a first pressure. In these examples, the manifold 224 provides the first portion of the print substance to the print head 228 at a second pressure and provides the second portion of the print substance to the recircuiation port (e.g., return port 219) at a third pressure. In these examples, the pump 218 can provide the print substance at the first pressure that is greater than the second pressure and/or the third pressure.

[0034] In another specific example, the device 200 can be a system that includes a print substance reservoir 202 that includes a refill port (e.g., fill port 206) to receive a print substance from a removeabie container and a first print line (e.g., first print line 214) to connect an extraction port (e.g., output port 212) of the print substance reservoir 202 to an input of a pump 218. In this example, the device 200 or system can include a second print line (e.g., print line 222) to connect an output of the pump 218 to an input of a manifold 224 (e.g., brake manifold, pressure regulated manifold, etc.) and a third print line (e.g., print head line 226) to connect a first output of the manifold 224 to a print head 228. Furthermore, in this example, the device 200 or system can include a fourth print line (e.g., second print line 216) to connect a second output of the manifold 224 to a recirculation port (e.g., return port 219) of the print substance reservoir 202 and a dispersion device 220 connected to recirculation port (e.g., return port 219) at an interior portion of the print substance reservoir 202. in this example, the quantity of print substance provided to the dispersion device 220 creates a positive pressure in the plurality of print lines. For example, the dispersion device creates a positive pressure in the print line 222, print head line 226, and/or the second print line 216.

[0035] In this example, the pump 218 can provide a first quantity of print substance to the manifold 224 that is greater than a second quantity of print substance utilized by the print head 228. In this example, a quantity of print substance provided to the dispersion device 220 through the fourth line (e.g., second print line 216) is a difference between the first quantity of print substance and the second quantity of print substance. As described herein, the pump 218 can provide a greater pressure of print substance, which can correspond to the quantity of print substance provided over a period of time. In this way, the pump 218 can provide a greater quantity of print substance to the manifold 224 than is utilized by the print head 228. In this way, the manifold 224 can reduce the quantity of print substance that is received from the pump 218 to be provided to the print head 228.

[0036] Fig. 3 illustrates an example device 300 that includes a plurality of reservoirs 302-1, 302-2 with a plurality of pumps 318-1 , 318-2 and a manifold 324. Although two reservoirs 302-1 , 302-2 with corresponding two pumps 318-1, 318-2 are illustrated in Fig. 3, the present disclosure is not so limited. For example, the device 300 can include a plurality of additional reservoirs and corresponding pumps for each color print substance utilized by a printing device. In these examples, the first reservoir 302-1 can be a first color print substance and the second reservoir 302-2 can be a second color print substance that is different than the first color print substance.

[0037] The device 300 can include the same or similar elements as device 100 as illustrated in Fig. 1 and/or the same or similar elements as device 200 as illustrated in Fig. 2. For example, the first reservoir 302-1 can include a corresponding first pump 318-1 that is coupled to the manifold 324 such that a first portion of the print substance from first pump 318-1 is provided to a first print head 328-1 and a second portion of the print substance from the first pump 318-1 is returned to the first reservoir 302-1. In a similar way, the second reservoir 302-2 can include a corresponding second pump 318-2 that is coupled to the manifold 324 such that a first portion of the print substance from second pump 318-2 is provided to a second print head 328-2 and a second portion of the print substance from the second pump 318-2 is returned to the second reservoir 302-2.

[0038] As described herein, the device 300 can utilize a single manifold 324 to transfer print substance from a plurality of different reservoirs 302-1, 302-2 and/or a plurality of different pumps 318-1, 318-2 such that the print substance is provided to the corresponding print head 328-1, 328-2 at a defined pressure through a corresponding manifold line 326-1, 326-2. As described herein, the first print head 328-1 can utilize a particular pressure or particular quantity over a period of time of print substance and the second print head 328-2 can utilize a particular pressure or particular quantity over a period of time of print substance. In some examples, the first print head 328-1 and the second print head 328-2 can utilize the same pressure of print substance or utilize a different pressure of print substance. In this way, the manifold 324 can utilize a first pressure valve for the first manifold line 326-1 to provide a first pressure to the first print head 328-1 and utilize a second pressure valve for the second manifold line 326-2 to provide a second pressure to the second print head 328-2.

[0039] As described herein, the first reservoir 302-1 can include a first print line 314-1 that is coupled to the first reservoir 302-1 and an input of the first pump 318-1. in these exampies, the first pump 318- 1 can be coupled to an input of the manifold 324. The manifold can divert a first portion of the print substance provided by the first pump 318-1 through the first manifold line 326-1 at a first pressure for the first print head 328-1 and divert a second portion of the print substance provided by the first pump 318-1 through the second print line 316-1 at a second pressure to be returned to a first dispersion device 320-1 of the first reservoir 302-1. In a similar way, the second reservoir 302-2 can include a first print line 314-2 that is coupled to the second reservoir 302-2 and an input of the second pump 318-2. In these examples, the second pump 318-2 can be coupled to an input of the manifold 324. The manifold 324 can divert a first portion of the print substance provided by the second pump 318-2 through the second manifold line 326-2 at a first pressure for the second print head 328-2 and divert a second portion of the print substance provided by the second pump 318-2 through the second print line 316-2 at a second pressure to be returned to a second dispersion device 320-2 of the second reservoir 302-2. [0040] As described herein, first pump 318-1 can provide the print substance from the first reservoir 302-1 at a pressure that is greater than the particular pressure provided to the first print head 328-1. In a similar way, the second pump 318-2 can provide the print substance from the second reservoir 302-2 at a pressure that is greater than the particular pressure provided to the second print head 328-2. In this way, the manifold 324 can reduce the pressure of the print substance received from the plurality of pumps 318-1, 318-2 to provide the print substance to the corresponding print heads 328-1, 328-2 at a particular pressure. In addition, the manifold 324 can be utilized to remove gas from the print substance received from the plurality of pumps 318-1 , 328-2 and direct the removed gas into the corresponding second print lines 316-1 , 316-2 to be returned to the corresponding reservoirs 302-1 , 302-2.

[0041] In this way, the device 300 can be utilized to provide a particular pressure of print substance to the plurality of print heads 328-1, 328-2, remove gas that is within the print substance prior to being provided to the plurality of print heads 328-1, 328-2, and/or mix print substance that is within the plurality of reservoirs 302- 1, 302-2.

[0042] In the foregoing detailed description of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration how examples of the disclosure may be practiced. These examples are described in sufficient detail to enabie those of ordinary skili in the art to practice the exampies of this disciosure, and it is to be understood that other exampies may be utilized and that process, electrical, and/or structural changes may be made without departing from the scope of the disclosure. Further, as used herein, “a” refers to one such thing or more than one such thing.

[0043] The figures herein follow a numbering convention in which the first digit corresponds to the drawing figure number and the remaining digits identify an element or component in the drawing. For example, reference numeral 102 may refer to element 102 in Figure 1 and an analogous element may be identified by reference numeral 302 in Figure 3. Elements shown in the various figures herein can be added, exchanged, and/or eliminated to provide additional examples of the disclosure. In addition, the proportion and the relative scale of the elements provided in the figures are intended to illustrate the examples of the disclosure, and should not be taken in a limiting sense.

[0044] It can be understood that when an element is referred to as being "on," "connected to", “coupled to”, or "coupled with" another element, it can be directly on, connected, or coupled with the other element or intervening elements may be present. In contrast, when an object is “directly coupled to” or “directly coupled with” another element it is understood that are no intervening elements (adhesives, screws, other elements) etc.

[0045] The above specification, examples, and data provide a description of the system and method of the disclosure. Since many examples can be made without departing from the spirit and scope of the system and method of the disclosure, this specification merely sets forth some of the many possible example configurations and implementations.

Claims

What is claimed is:

1. A device, comprising: a refillable print substance reservoir; a first port of the print substance reservoir coupled to an input of a pump to provide a print substance to the pump; a manifold coupled to an output of the pump to receive the print substance from the pump; a second port of the print substance reservoir to receive a first portion of the print substance from the manifold; and a print head to receive a second portion of the print substance from the manifold.

2. The device of claim 1 , wherein the second port is positioned above the first port.

3. The device of claim 1, wherein the manifold is to separate a gas from print substance received from the pump.

4. The device of claim 3, wherein the manifold is to direct gas to the second port.

5. The device of claim 1 , further comprising a vent to allow a gas to be released from an interior portion of the print substance reservoir.

6. The device of claim 1, further comprising a dispersion device coupled to the second port to mix the print substance within the print substance reservoir, wherein the dispersion device increases a pressure of the print substance between the second port and the print substance reservoir.

7. The device of claim 1, wherein the refillable print substance reservoir includes a refill port to receive a removable print substance container that can be Installed and removed from the refill portion without impacting operation of the print head.

8. A printing device, comprising: a refillable print substance reservoir to store a print substance to be utilized by a print head, wherein the refillable print substance reservoir is refillable during operation of the print head; an input port coupled to the print substance reservoir to receive additional print substance from a print substance container; an extraction port coupled to the print substance reservoir to provide the print substance to an input of a pump; a manifold to receive the print substance from the pump, wherein the manifold is to separate a gas out of the received print substance; the print head to receive a first portion of the print substance from the manifold; and a recirculation port coupled to the print substance reservoir to receive a second portion of the print substance and the gas from the manifold.

9. The printing device of claim 8, wherein the pump provides the print substance to the manifold at a first pressure.

10. The printing device of claim 9, wherein the manifold provides the first portion of the print substance to the print head at a second pressure and provides the second portion of the print substance to the recirculation port at a third pressure.

11. The printing device of claim 8, comprising a vent coupled to the print substance reservoir to release the gas received at the recirculation port outside the print substance reservoir.

12. A system, comprising: a print substance reservoir that includes a refill port to receive a print substance from a removeable container, wherein the refill port receives the print substance from the removable container during an operation of a print head; a first print line to connect an extraction port of the print substance reservoir to an input of a pump; a second print line to connect an output of the pump to an input of a manifold; a third print line to connect a first output of the manifold to the print head; a fourth print line to connect a second output of the manifold to a recirculation port of the print substance reservoir; and a dispersion device connected to recirculation port at an interior portion of the print substance reservoir.

13. The system of claim 12, wherein the pump provides a first quantity of print substance to the manifold that is greater than a second quantity of print substance utilized by the print head.

14. The system of claim 13, wherein a quantity of print substance provided to the dispersion device through the fourth line is a difference between the first quantity of print substance and the second quantity of print substance.

15. The system of claim 14, wherein the quantity of print substance provided to the dispersion device creates a positive pressure in the second print line, the third print line, and the fourth print line.