Positioning assembly and packaging machine
By designing positioning components in the cigarette packaging machine, the height and angle adjustment of the steel stamp wheel is simplified, the cumbersome adjustment process in the prior art is solved, and the operating efficiency of the equipment is significantly improved.
Patent Information
- Application Number
- CN202411661199.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2024-12-27
AI Technical Summary
The adjustment process of the steel stamp wheel in the existing cigarette packaging machines is cumbersome and takes a long time, which affects the operating efficiency of the equipment.
A positioning assembly is designed, including adjustable first and second frames, abutment surfaces and clamping assembly, through which precise adjustment of the steel wheel flap is achieved, simplifying the height and angle adjustment of the steel wheel.
It greatly improves the adjustment efficiency of the steel stamp wheel, reduces the adjustment time, reduces the labor intensity of the workers, and improves the overall operating efficiency of the packaging machine.
Smart Images
Figure CN119190503A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of cigarette packaging, and in particular to a positioning component and a packaging machine. Background Art
[0002] In the process of cigarette packaging, the cigarette factory needs to stamp the inner lining paper. The stamping process is achieved by using two opposing rollers, such as Figure 1 As shown, one of the rollers 1-1 is provided with a steel stamping wheel 1-2, and a plurality of steel stamping wheels 1-2 are coaxially provided, and each steel stamping wheel 1-2 is circumferentially divided into a plurality of 10 wheel petals 1-3 corresponding to the numbers 0-9. When the lining paper passes between the two opposite rollers 1-1, the outward wheel petals 1-3 can be steel stamped on the lining paper. The plurality of steel stamping wheels 1-2 are mounted on the roller 1-1 via an eccentric shaft 1-4, so that the height of the outer periphery of the steel stamping wheel 1-2 and the outer periphery of the wheel petal plate 1-3 protruding from the outer periphery of the roller 1-1 can be achieved by rotating and adjusting the eccentric shaft 1-4. Corresponding to each batch of cigarette products, the steel stamping numbers on the lining paper need to be adjusted accordingly. Therefore, each steel stamping wheel 1-2 needs to be rotated and adjusted to The outward-facing wheel petal 1-3 can be digitally adjusted, and then the steel stamp wheel 1-2 can be locked by the positioning piece 1-5. However, the actual adjustment process of the steel stamp wheel 1-2 is very troublesome and takes 4-6 hours, because when adjusting the steel stamp wheel 1-2, the roller 1-1 must be disassembled, and then the eccentric wheel 1-4 must be loosened for screwing adjustment. The important thing is that after adjusting the outward-facing numbers of the steel stamp wheel 1-2, the circumferential angle position of the wheel petal 1-3 must meet the standard, and the height of the outward-facing wheel petal 1-3 protruding from the outer periphery of the roller 1-1 must meet the standard. After the adjustment is completed, whether the positions and sizes of each part meet the standard must be judged by the subsequent lining paper steel stamping effect, and repeated debugging and test runs must be carried out, which affects the operating efficiency of the equipment. Summary of the invention
[0003] The purpose of the present application is to provide a positioning assembly and a packaging machine, which can very conveniently realize the adjustment of the steel printing wheel in the cigarette packaging machine, thereby effectively solving the deficiencies existing in the prior art.
[0004] To this end, an embodiment of the present application provides a positioning component, including:
[0005] The first frame can be adjusted along a first direction, and the first direction is parallel to the axis direction of the roller of the packaging machine;
[0006] A second frame is disposed on the first frame, and the second frame can be adjusted along a second direction relative to the first frame, and the second direction is a radial direction of the steel stamp wheel;
[0007] An abutting surface, provided on the second frame, and used for abutting against a wheel petal of the steel stamping wheel;
[0008] The clamping assembly is arranged on the second frame and is used for clamping and limiting the steel printing wheel petal against which the abutment surface abuts.
[0009] In some possible implementations, the clamping assembly includes a first clamping arm and a second clamping arm, and the first clamping arm and the second clamping arm are respectively disposed at positions on both sides of the second frame corresponding to the abutment surface.
[0010] In some possible implementations, the second frame is configured in a long plate shape, and one end surface of the second frame is configured as a supporting surface.
[0011] In some possible implementations, the first clamp arm and the second clamp arm are both plate-shaped structures, and the plane where the first clamp arm is located and the plane where the second clamp arm is located are both perpendicular to the abutment surface.
[0012] In some possible implementations, the first clamp arm and the second clamp arm can be adjusted along the second direction relative to the second frame.
[0013] In some possible implementations, an edge of one end of the first clamp arm away from the abutting surface and an edge of one end of the second clamp arm away from the abutting surface are both parallel to the abutting surface.
[0014] The present application also provides a packaging machine, including the above-mentioned positioning assembly, and further including:
[0015] a first frame, the first frame body being mounted on the first frame;
[0016] Second rack;
[0017] A first roller, mounted on the first frame;
[0018] A second roller is installed on the second frame, and the first roller and the second roller are arranged in parallel;
[0019] Wherein, the first roller is equipped with a steel printing wheel.
[0020] In some possible implementations, an elastic component is disposed between the first frame and the second frame to drive the first roller and the second roller to abut against each other.
[0021] In some possible implementations, a base is further included, the first frame and the second frame are both arranged on the base, and at least one of the first frame and the second frame is hinged to the base so that the first roller and the second roller are moved closer to or farther away from each other.
[0022] In some possible implementations, a guide rail is disposed on the first frame, the direction of the guide rail is parallel to the axial direction of the first roller, and the first frame body is adjustably disposed on the guide rail.
[0023] In some possible implementations, the guide rail is located directly above the first roller.
[0024] According to the positioning assembly provided in the embodiment of the present application, under the action of the positioning assembly, the abutting surface on the second frame can abut against the outermost periphery of the wheel petal of the steel printing wheel on the roller of the packaging machine, and then the height of the wheel petal of the steel printing wheel extending out of the outermost periphery of the roller can be limited. By setting the positions of the second frame and the first frame, the height of the outermost periphery of the wheel petal of the steel printing wheel extending out of the outermost periphery of the roller can be controlled. The clamping assembly can clamp the wheel petal of the steel printing wheel and also control the circumferential angle position of the steel printing wheel, so that the adjustment of the steel printing wheel is very convenient and quick, which greatly improves the adjustment efficiency of the steel printing wheel and is beneficial to improving the operating efficiency of the packaging machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the steel stamping wheel in the prior art;
[0026] Figure 2 A schematic diagram of the structure of a packaging machine provided in an embodiment of the present application;
[0027] Figure 3 for Figure 2 A partial enlarged view of the middle A;
[0028] Figure 4 A schematic diagram of the partial structure of the second frame and the steel stamping wheel provided in the embodiment of the present application;
[0029] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;
[0030] Figure 6 A schematic diagram of a partial structure of the cooperation between the second frame and the clamping assembly provided in an embodiment of the present application;
[0031] Figure 7 for Figure 6 Exploded view of . DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0033] like Figure 2-Figure 7As shown, an embodiment of the present application provides a positioning component, which is applied to a cigarette packaging machine. During the cigarette production process, the cigarette packaging machine must complete the packaging of cigarette sticks, cigarette boxes and cigarette strips, etc., which also includes a steel printing process for the inner lining paper of the cigarette box. A steel printing mark is stamped on the inner lining paper of the cigarette box according to each batch of products. The steel printing on the inner lining paper is achieved by two rollers. Two rollers are arranged side by side on the packaging machine, and a cavity is arranged on the outer periphery of one of the rollers, and a steel printing wheel is arranged in the cavity. The steel printing wheel is installed on the roller through an eccentric shaft. There are multiple steel printing wheels, and the outer periphery of each steel printing wheel is divided into 10 parts to form 10 wheel petals, corresponding to the numbers 0-9. The outer periphery of the 10 wheel petals on the same steel printing wheel is respectively provided with a protruding number. The two rollers rotate side by side, and the inner lining paper is steel printed when it passes between the two rollers. A positioning piece is also arranged on the roller, and the edge of the positioning piece It can be stuck in the gap between adjacent wheel petals, thereby achieving circumferential limitation of the steel printing wheel. This structure of the packaging machine has certain disadvantages in actual use. When the steel printing numbers of the steel printing wheel need to be adjusted, the eccentric wheel needs to be loosened, and then each steel printing wheel needs to be rotated so that the numbers facing the outermost side change. The eccentric wheel needs to be rotated so that the height of the outermost periphery of the steel printing wheel extending out of the outermost periphery of the roller wheel meets the standard requirements. Whether the size of the extended height and the circumferential angle position of the outward digital wheel petal meet the standard requirements requires subsequent test runs to verify. Repeated adjustments and test runs are required to meet production requirements. In the process, the rollers, steel printing wheels, etc. need to be disassembled and operated many times, which is time-consuming and labor-intensive, and has high labor intensity, which is not conducive to improving the operating efficiency of the packaging machine. The positioning component provided in this application is intended to improve the convenience of adjusting the steel printing wheel so as to improve the overall operating efficiency of the equipment.
[0034] The positioning assembly includes a first frame 101 and a second frame 102. The first frame 101 can be adjusted along a first direction, which is parallel to the axis of the roller on the packaging machine. The roller is a roller for mounting the steel stamp wheel 500. The first frame 101 can be adjusted to move back and forth along a direction parallel to the axis of the roller. The second frame 102 is arranged on the first frame 101, and the second frame 102 can be adjusted relative to the first frame 101 along a second direction. The second direction is the diameter direction of the steel stamp wheel 500, that is, the second frame 1 02 is adjustably arranged on the first frame 101, and the extension line of the adjustment direction of the second frame 102 relative to the first frame 101 will pass through the axis of the steel printing wheel 500, and the extension line coincides with the diameter direction of the steel printing wheel 500. A contact surface 1021 is arranged on the second frame 102, and the contact surface 1021 is used to contact the wheel petal of the steel printing wheel 500. A clamping component is also arranged on the second frame 102, and the clamping component is used to clamp the wheel petal of the steel printing wheel 500 against which the limit contact surface 1021 contacts. Under the action of the contact surface 1021 and the clamping component When the steel stamp wheel 500 needs to be adjusted, the eccentric shaft that fixes the steel stamp wheel 500 is loosened, and then the eccentric shaft is screwed to change the height of the outermost periphery of the wheel protruding from the outermost periphery of the roller. According to the production standard requirements, the position of the second frame 102 on the first frame 101 is pre-set so that the position of the second frame 102 is fixed, that is, the position of the abutment surface 1021 is fixed. For this position of the abutment surface 1021, when the outward wheel flap on the steel stamp wheel 500 abuts against the abutment surface 1021, it means that the height of the outward wheel flap protruding from the outermost periphery of the roller reaches the standard. According to the accurate requirements, when the eccentric shaft is rotated and adjusted, the required outward-facing wheel petal and the abutment surface 1021 can be abutted against each other, and the clamping assembly can clamp the outward-facing wheel petal, and the circumferential angle position of the wheel petal on the steel printing wheel 500 can be positioned and adjusted. In this way, the clamping assembly and the abutment surface 1021 cooperate with each other to achieve precise adjustment of the steel printing wheel 500 without repeated debugging and trial runs, which greatly improves the adjustment convenience of the steel printing wheel 500, significantly shortens the time consumption, reduces the work intensity of related operators, and is conducive to improving the overall operating efficiency of the packaging machine.
[0035] In one embodiment, the clamping assembly includes a first clamping arm 201 and a second clamping arm 202, and the first clamping arm 201 and the second clamping arm 202 are respectively arranged on the second frame 102 at positions corresponding to both sides of the abutment surface 1021, that is, the first clamping arm 201 and the second clamping arm 202 are both arranged on the second frame 102, and the first clamping arm 201 and the second clamping arm 202 are respectively located on both sides of the abutment surface 1021, so that the abutment surface 1021 in the middle and the wheel petal of the steel printing wheel 500 can be abutted against each other, and the first clamping arm 201 and the second clamping arm 202 on both sides are respectively clamped and limited on both sides of the wheel petal, so that adjustment is more convenient.
[0036] Preferably, the second frame 102 is arranged in the shape of a long plate, and one end surface of the second frame 102 is configured as a supporting surface 1021, and the supporting surface 1021 is a flat surface. For example, the second frame 102 is a rectangular long plate, and the end surface of one end of the second frame 102 in the length direction is configured as the supporting surface 1021. The second frame 102 is vertically arranged in the length direction, and the upper part of the second frame 102 is connected to the first frame 101 by screws, etc., and a waist-shaped groove is arranged on the second frame 102, and the waist-shaped groove is connected to the first frame 101 by screws. The direction of the waist-shaped groove is arranged along the length direction of the second frame 102, thereby realizing the adjustment of the second frame 102 on the first frame 101 along the second direction.
[0037] More preferably, the first clamp arm 201 and the second clamp arm 202 are both plate-like structures, and the plane where the first clamp arm 201 is located and the plane where the second clamp arm 202 is located are both perpendicular to the abutting surface 1021. In this embodiment, the second frame 102 is a plate-like structure, the first clamp arm 201 is arranged on one side of the thickness direction of the second frame 102, and the second clamp arm 202 is arranged on the other side of the thickness direction of the second frame 102, and a portion of the first clamp arm 201 protrudes from one end of the abutting surface 1021 of the second frame 102, and a portion of the second clamp arm 202 protrudes from the second frame 102. 2 end of the abutment surface 1021, so that the first clamping arm 201 and the abutment surface 1021 are perpendicular, and the second clamping arm 202 and the abutment surface 1021 are perpendicular. In this way, the diameter direction of the second frame 102 and the steel stamp wheel 500 coincides, so that the abutment surface 1021 and the outer periphery of the steel stamp wheel 500 can be tangent to the outer periphery of the steel stamp wheel 500 when they abut against each other, so that the abutment surface 1021 and the steel stamp wheel 500 can abut against each other more stably and reliably, and the first clamping arm 201 and the second clamping arm 202 can respectively fit into the gaps on both sides of the wheel petal to adjust the circumferential limit of the wheel petal.
[0038] Preferably, the first clamp arm 201 and the second clamp arm 202 can be adjusted along the second direction relative to the second frame 102, so that the first clamp arm 201 and the second clamp arm 202 can extend further outward from the second frame 102 or be more retracted into the second frame 102 along the second direction. In this way, it can cope with various specifications of steel stamp wheels 500 and improve applicability.
[0039] In some embodiments, the edge of one end of the first clamp arm 201 away from the abutment surface 1021 and the edge of one end of the second clamp arm 202 away from the abutment surface 1021 are both parallel to the abutment surface 1021, and the direction of the abutment surface 1021 is parallel to the first direction. In this way, the outward petals of each steel printing wheel 500 are more flush, and each steel printing wheel 500 remains neat, which is conducive to improving the quality level of the steel printing process.
[0040] On the other hand, an embodiment of the present application also provides a packaging machine, including the above-mentioned positioning assembly, and also including a first frame 301, a second frame 302, a first roller 401 and a second roller 402, the first frame 101 is installed on the first frame 301, the first frame 301 and the second frame 302 are arranged in parallel, the first roller 401 is installed on the first frame 301, the second roller 402 is installed on the second frame 302, the first roller 401 and the second roller 402 are arranged in parallel, and a steel stamp wheel 500 is installed on the first roller 401.
[0041] Preferably, an elastic component 600 is provided between the first frame 301 and the second frame 302. Under the action of the elastic component 600, the first frame 301 and the second frame 302 are brought close to each other, and then the first roller 401 and the second roller 402 are brought close to each other. Driven by other driving devices such as a driving motor, the first roller 401 and the second roller 402 rotate, so that the lining paper passes between the first roller 401 and the second roller 402, and then under the action of the steel printing wheel 500, the steel printing process is completed on the lining paper.
[0042] In one example, a base 700 is further included, on which the first frame 301 and the second frame 302 are both arranged, and at least one of the first frame 301 and the second frame 302 is hinged to the base 700, so that the first roller 401 and the second roller 402 are close to each other or away from each other. Preferably, the bottom of the first frame 301 is fixedly arranged on the base 700, and the bottom of the second frame 302 is hinged to the base 700. The middle part of the first frame 301 and the middle part of the second frame 302 are connected by an elastic component 600. The elastic component 600 can be a spring. Under the action of the spring, the second frame 302 is driven to swing toward the first frame 301, so that the first roller 401 on the first frame 301 and the second roller 402 on the second frame 302 are close to each other, so as to stamp the liner paper.
[0043] More preferably, one side of the bottom of the second frame 302 away from the first frame 301 is hinged on the base 700, and a top screw can be screwed on the other side of the bottom of the second frame 302, and part of the top screw is threaded into the bottom of the second frame 302, and the other part of the top screw extends out of the bottom of the second frame 302 and abuts against the top of the base. In this way, by adjusting the length of the top screw extending out of the bottom of the second frame 302, the inclination amplitude of the second frame 302 can be adjusted, and then the gap between the first roller 401 and the second roller 402 can be adjusted.
[0044] More preferably, a guide rail 1011 is provided on the first frame 301, and the direction of the guide rail 1011 is parallel to the axial direction of the first roller 401. The first frame 101 is adjustably set on the guide rail 1011. The guide rail 1011 can be two parallel guide columns. Two parallel through holes are provided on the first frame 101, so that the second frame 102 can be movably mounted on the two guide columns. The first frame 101 and the guide columns can be locked and released by screws. The screws are screwed into the first frame 101 and tightened on the guide columns to achieve locking of the first frame 101 relative to the guide columns. The screws are screwed out to release the first frame 101 relative to the guide columns. The first frame 101 can be adjusted along the guide columns to achieve adjustment of the first frame 101 along the first direction.
[0045] Preferably, the guide rail 1011 is located directly above the first roller 401. When the steel stamp wheel 500 needs to be adjusted, the first frame 101 is adjusted to the position above the steel stamp wheel 500 on the roller, and then the first roller 401 is rotated so that the steel stamp wheel 500 on the first roller 401 faces upward, that is, the axis of the steel stamp wheel 500, the axis of the first roller 401 and the second frame 102 are located in the same vertical plane. In this way, it is more convenient to adjust the alignment of the steel stamp wheel 500. At this time, the steel stamp wheel 500 is loosened and fixed. 0, rotate the eccentric wheel while rotating the steel stamp wheel 500, so that the abutment surface 1021 on the second frame 102 abuts against the outermost periphery of the outward wheel petal, and the first clamping arm 201 and the second clamping arm 202 on both sides of the second frame 102 clamp and limit the wheel petal, thus completing the adjustment of the steel stamp wheel 500, and then tighten the steel stamp wheel 500, the eccentric shaft, etc., after completing the specified digital adjustment of the steel stamp wheel 500, the first roller 401 is restored to install, which greatly improves the adjustment convenience of the steel stamp wheel 500.
[0046] Preferably, both ends of the guide rail 1011 are respectively matched with the top of the first frame 301, one end of the guide rail 1011 is hingedly connected to one end of the first frame 301, and the other end of the guide rail 1011 and the other end of the first frame 301 can be downwardly seated on the other end of the first frame 301. When the steel stamp wheel 500 needs to be adjusted, the guide rail 1011 is flipped so that the guide rail 1011 is above the first roller 401. When the steel stamp wheel 500 does not need to be adjusted or the first roller 401 is adjusted or disassembled, the guide rail 1011 is flipped outward so that the guide rail 1011 is not above the first roller 401. The open space is convenient for operators to operate.
[0047] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.
[0048] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).
[0049] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.
[0050] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A positioning component, characterized in that: include: The first frame can be adjusted along a first direction, and the first direction is parallel to the axis direction of the roller of the packaging machine; A second frame is disposed on the first frame, and the second frame can be adjusted along a second direction relative to the first frame, and the second direction is a radial direction of the steel stamp wheel; An abutting surface, provided on the second frame, and used for abutting against a wheel petal of the steel stamping wheel; The clamping assembly is arranged on the second frame and is used for clamping and limiting the steel printing wheel petal against which the abutment surface abuts.
2. A positioning assembly according to claim 1, characterized in that: The clamping assembly comprises a first clamping arm and a second clamping arm, and the first clamping arm and the second clamping arm are respectively arranged at positions on both sides of the second frame corresponding to the abutting surface.
3. A positioning assembly according to claim 2, characterized in that: The second frame is arranged in a long plate shape, and one end surface of the second frame is configured as abutment surface.
4. A positioning assembly according to claim 3, characterized in that: The first clamp arm and the second clamp arm are both plate-shaped structures, and the plane where the first clamp arm is located and the plane where the second clamp arm is located are both perpendicular to the abutting surface.
5. A positioning assembly according to claim 2, characterized in that: The first clamping arm and the second clamping arm can be adjusted along a second direction relative to the second frame.
6. A positioning assembly according to claim 2, characterized in that: An edge of one end of the first clamp arm away from the abutting surface and an edge of one end of the second clamp arm away from the abutting surface are both parallel to the abutting surface.
7. A packaging machine, comprising a positioning assembly as claimed in any one of claims 1 to 6, characterized in that: Also includes: a first frame, the first frame body being mounted on the first frame; Second rack; A first roller, mounted on the first frame; A second roller is installed on the second frame, and the first roller and the second roller are arranged in parallel; Wherein, the first roller is equipped with a steel printing wheel.
8. A packaging machine according to claim 7, characterized in that: An elastic component is arranged between the first frame and the second frame to drive the first roller and the second roller to abut against each other.
9. A packaging machine according to claim 8, characterized in that: It also includes a base, the first frame and the second frame are both arranged on the base, and at least one of the first frame and the second frame is hinged to the base so that the first roller and the second roller are close to or away from each other.
10. A packaging machine according to claim 7, characterized in that: The first frame is provided with a guide rail, the direction of the guide rail is parallel to the axial direction of the first roller, and the first frame body is adjustably arranged on the guide rail.
11. A packaging machine according to claim 10, characterized in that: The guide rail is located directly above the first roller.