CN1186202C - Handling roller - Google Patents

Abstract

This invention provides a carrying roller capable of easily achieving high carrying precision over a long period. A number of micro-protrusions have two kinds of the higher micro-protrusions with a height ranging from 0.02 to 0.2 mm and the lower micro-protrusions with a height ranging from 0.008 to 0.15 mm. Top parts of the lower micro-protrusions are formed flat.

Description

Conveying cylinder

Technical field

The present invention relates to a kind of conveying cylinder, relate to a kind of multiple recording medium that is suitable for carrying specifically, especially carry the conveying cylinder of the recording medium that is used for the information record.

Background technology

The recording device that information such as image, image can be recorded in recording medium in recent years has, for example dot printers such as electronic copier, facsimile apparatus, laser printer, thermal printer, ink jet printer.In this recording device,, need to be equipped with conveying mechanism with the feedway that can carry recording medium in order to be delivered to necessary position as the recording medium that is used for recorded information of recording medium.As this feedway, conveying cylinder often is used because it is simple in structure, cost is low.In addition, as conveying cylinder, the metal roller that is made of metal is owing to its superior in durability, and circularity is better, can keep delivery precision, therefore often is used.

Figure 10 has represented one of the conveying cylinder that is formed by metal in the past example.Conveying cylinder 1 comprised by metal and formed the columned metallic cylinder body 2 of staged in the past.The surface of this metallic cylinder body 2 be the outer peripheral face inner shafts to the both ends side be respectively equipped with the projection formation portion 4 that is formed with a plurality of microspikes 3.In addition, become a pair of small diameter shaft neck 5 about the axial both ends of metallic cylinder body 2 are formed with respectively.

This conveying cylinder 1 is adapted on the conveying mechanism of recording device and can be rotated driving according to the propulsive effort of CD-ROM drive motor, as shown in figure 10, contact has the outer peripheral face that can carry out the crimping cylinder 6 of driven rotation with conveying cylinder 1 in the projection formation portion 4 of conveying cylinder 1.Therefore, shown in Figure 11 amplifies, form by rotation and drive conveying cylinder 1, clamping recording medium 7 and conveying between conveying cylinder 1 and crimping cylinder 6.At this moment, conveying cylinder 1 is embedded in the surface of recording medium 7 by the front end with a plurality of microspikes 3, has guaranteed seizure, conveying property and the delivery precision of recording medium 7 when clamping recording medium 7 is carried.

In addition, as the formation method of microspike 3, have and the instrument drift collided on the outer peripheral face of metallic cylinder body 2 and dashing of forming carved the etch processing etc. that job operation and etch metal roller main body 2 surfaces form jogs.

And in recording device in recent years, as recording of information medium 7 such as document image or images, regulation paper such as common paper, thick low, postcard are not only arranged, resin films such as polyester, polyethylene terephthalate are also arranged, in the diversified materials such as material of paper substrate surface coating resin.And then, in recent years in recording device along with height becomes more meticulous, colorize, its delivery precision is had higher requirement.

Yet the problem that exists in the above-mentioned conveying cylinder 1 in the past is that the contact pressure inequality of crimping cylinder 6 and the kind difference of recording medium 7 can cause different delivery precision.Particularly, the conveying cylinder 1 by is in the past carried out repeatedly the conveying and the reverse pumping of recording medium 7 and send, and repeat Y at least (Huang), M (magenta), the trichromatic China ink of C (green grass or young crops) form the recording device that requires high delivery precision of coloured image, then more obvious.

That is, in conveying cylinder 1 in the past, when the contact pressure of crimping cylinder 6 was uneven, the embedded quantity that microspike 3 is embedded in recording medium 7 can change.For example, darker when contact pressure is big, then more shallow when contact pressure is little.In addition, embedded quantity is different and different with the kind of recording medium 7.For example, darker when using regulation with soft recording medium 7 such as paper, more shallow when using hard recording medium 7 such as resin.Therefore, according to the variation of embedded quantity, the operational throughput of recording medium 7 also can change.In addition, follow the caused timeliness of increase of period of service to change, the contact pressure of crimping cylinder 6 diminishes, and diminishes with this contact pressure, and the embedded quantity of microspike 3 can change, and causes the operational throughput of recording medium 7 also to change.

Therefore need a kind of conveying cylinder that can easily obtain pinpoint accuracy for a long time.

Also have, as conveying cylinder in the past, though also once proposed to have the structure of high microspike and low two kinds of height of microspike microspike, but the front end of two kinds of height microspikes forms pointed respectively in this case, two kinds of microspikes are embedded into the recording medium surface respectively, so caused the difference owing to the different delivery precision that cause of kind of the inequality of contact pressure and recording medium.

Summary of the invention

In view of above situation, the object of the present invention is to provide a kind of conveying cylinder that can easily obtain pinpoint accuracy for a long time.

In order to achieve the above object, the feature of the cylindric conveying cylinder of the present invention be a plurality of microspikes comprise height at the high microspike of 0.03-0.1mm and height two kinds of the low microspikes of 0.01-0.08mm, the top flat ground of described low microspike forms.By adopting this structure, when carrying recording medium, the position of the top flat of low microspike be not embedded into the state lower support recording medium of recording medium, therefore have only the top of high microspike to embed in the recording medium, the inequality of its embedded quantity and contact pressure and recording medium kind are irrelevant simultaneously, keep certain value always.Therefore, can easily obtain for a long time high delivery precision.

Description of drawings

Fig. 1 is a front view of roughly representing all structures of conveying cylinder embodiment of the present invention.

Fig. 2 is the amplification plan view of the shape of microspike high in the presentation graphs 1.

Fig. 3 is the section-drawing along 3-3 line among Fig. 2.

Fig. 4 is the figure identical with Fig. 2 of the shape of microspike low in the presentation graphs 1.

Fig. 5 is the section-drawing along 5-5 line among Fig. 4.

Fig. 6 is the general principal view of the difference of height of microspike high in the presentation graphs 1 and low microspike.

Fig. 7 is the block diagram of the punch structure that uses when being illustrated in the plastic working of microspike of conveying cylinder of the present invention.

Fig. 8 is the lateral plan that the recording medium feed status of conveying cylinder embodiment of the present invention is adopted in expression.

Fig. 9 is the amplification profile along 9-9 line among Fig. 8.

Figure 10 roughly represents the front view of all structures of conveying cylinder in the past.

Figure 11 is that the lateral plan of the recording medium feed status of conveying cylinder is in the past adopted in expression.

The specific embodiment

Below in conjunction with the description of drawings embodiments of the invention.

Fig. 1 represents conveying cylinder of the present invention is applicable to embodiment as the paper feed roller of the feedway of recording medium in the recording device.

As shown in Figure 1, conveying cylinder 11 of the present invention comprises that forming its two ends by metal materials such as corrosion-resistant steels is the columned metallic cylinder body 12 of minor diameter staged.And the outer peripheral face inner shafts that forms with major diameter of metallic cylinder body 12 to both ends, be respectively equipped with the projection formation portion 14,14 that is shown in a plurality of microspikes 13 of Fig. 1 after amplifying through simplifying that is formed with.These projection formation portions 14,14 be arranged in the crimping cylinder that dots with Fig. 1 21 relative to the position.Also have, each projection formation portion 14,14 axially is that the length of left and right directions among Fig. 1 can form the length of slightly being longer than crimping cylinder 21 along metallic cylinder body 12, or slightly shortly also can.In addition, by being located at the minor diameter at metallic cylinder body 12 both ends, formation can be supported the pair of right and left collar 15 of this cylinder body 12 with rotating freely.

Also have, as the shape of metallic cylinder body 12, it is cylindric to be not limited to staged, and can be according to needs such as design concepts, selects from different shape such as simply cylindric, cylindric, that staged is cylindric.

Be formed on a plurality of microspikes 13 in the projection formation portion 14 of present embodiment and comprise two kinds of higher microspike (hereinafter referred to as high projection) 13H and lower microspike (being designated hereinafter simply as low projection) 13L.Low projection 13L in the present embodiment is configured on 3 low projection formation 14L of portion that are positioned at projection formation portion 14 inboard both ends and central portion.In addition, high projection 13H is configured on 2 high projection formation 14H of portion between described 3 low projection formation 14L of portion.

The shape of described high projection 13H is shown in the amplification plan view of the amplification plan view of Fig. 2 and Fig. 3, by hand of rotation towards conveying cylinder 11, promptly as the jut of the throughput direction of the recording mediums such as common paper 17 (Fig. 1) of recording medium be the height of triangular shape roughly upright establish plane 13Ha and be connected in these high upright 1/4th spheres of establishing plane 13Ha roughly form semicircle top shape, its top 13Hb forms and be sharp triangle when throughput direction is observed.Therefore the top 13Hb of high projection 13H when carrying recording medium 17, almost is the surface that is embedded in recording medium 17 by a contact.So high projection 13H is in the described high projection formation 14H of portion, making each high upright plane 13Ha that establishes is the hand of rotation of conveying cylinder 11 and roughly equidistantly configuration along the circumferential direction towards the throughput direction of recording medium 17, and meanwhile these high projection 13H that along the circumferential direction form a line become multiple row in axial arrangement.

The shape of described low projection 13L shown in the amplification plan view of the amplification plan view of Fig. 4 and Fig. 5, roughly be cut dome-shaped.That is, the protrusion that the low projection 13L in the present embodiment has towards conveying cylinder 11 hand of rotation roughly is the trapezoidal low upright plane 13La that establishes in metallic cylinder 12 outer peripheral faces top, and its top 13Lb then is formed flatly.Top 13Lb that should low projection 13L is not to be embedded in the surface of recording medium 17 by line contact or face contact when carrying described recording medium 17, but plays the effect of support.Therefore, low projection 13L is in the described low projection formation 14L of portion, make each low upright establish that plane 13La points to the hand of rotation of conveying cylinder 11 and in roughly equidistantly configuration of circumferencial direction, these low projection 13L that along the circumferential direction form a line become multiple row in axial arrangement simultaneously.

Also have,, also can form the tabular surface that extends along the hand of rotation of conveying cylinder 11 as the shape of top 13Lb.

Microspike in the present embodiment 13 is illustrated.The height H h of high projection 13H is preferably the 0.03-0.1mm scope to be advisable in the 0.02-0.2mm scope, more preferably the 0.04-0.08mm scope.If height H h is lower than this scope, then the front end of high projection 13H is difficult to be embedded in recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.And on the other hand, if height H h is higher than this scope, then high projection 13H is excessive to the amount of thrusting of recording medium 17, will stay the vestige of high projection 13H on the lettering face of recording medium 17.

And then the height Lh of low projection 13L is preferably the 0.01-0.08mm scope, more preferably the 0.02-0.05mm scope to be advisable in the 0.008-0.15mm scope.If height Lh is lower than this scope, then will stay the vestige of high projection 13H on the lettering face of recording medium 17.And if height Lh is higher than this scope on the other hand, then the front end of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.

In addition, shown in the enlarged front view among Fig. 6, difference is difference of height Δ h (Δ h=Hh-Lh) between each the height H h of high projection 13H and low projection 13L and the Lh, when the diameter of conveying cylinder 11 is made as 4-30mm, to be advisable in the 0.007-0.05mm scope, be preferably the 0.01-0.04mm scope, more preferably the 0.02-0.03mm scope.If difference of height Δ h is less than this scope, then the front end of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.And if difference of height Δ h is greater than this scope on the other hand, then high projection 13H can thrust more deeply in recording medium 17, will stay the vestige of high projection 13 on the lettering face of recording medium 17.

And then, angle H θ, L θ between the low upright tangent line of establishing plane 13La and metallic cylinder body 12 outer peripheral faces that the height of Fig. 3 and high projection 13 shown in Figure 5 is upright establishes plane 13Ha and low projection 13L are advisable in 90-140 ° of scope respectively, be preferably 100-125 ° of scope, more preferably 105-120 ° of scope.If H is θ, L θ is less than this scope, then the top 13Lb of low projection 13L is embedded in the recording medium 17 easily, and the top 13Hb of high projection 13H can thrust more deeply in recording medium 17, will stay the vestige of high projection 13 on the lettering face of recording medium 17.On the other hand, if H is θ, L θ is greater than this scope, and then the top 13Hb of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.

In addition, as shown in Figure 6, each is advisable drift angle H α, L α when the throughput direction of recording medium 17 is observed top Hb, the Lb of described high projection 13H and low projection 13L in 30-90 ° of scope, is preferably 40-75 ° of scope, more preferably 45-60 ° of scope.If H is α, L α is less than this scope, then the top 13Lb of low projection 13L is embedded in the recording medium 17 easily, and the top 13Hb of high projection 13H can thrust more deeply in recording medium 17, will stay the vestige of high projection 13 on the lettering face of recording medium 17.On the other hand, if H is α, L α is greater than this scope, then the top 13Hb of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.

Also have, width Hc, the Lc of the par of top Hb, Lb when the throughput direction of recording medium 17 is observed top Hb, the Lb of described high projection 13H and low projection 13L, as shown in Figure 6, Hc is to be advisable less than the 0.05mm scope, be preferably the scope less than 0.04mm, more preferably less than the 0.02mm scope, and Lc is advisable with the 0.05-0.2mm scope, be preferably the 0.07-0.15mm scope, more preferably the 0.09-0.12mm scope.

If the width Hc of the par of described top Hb is greater than this scope, then the top 13Hb of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, and its result can't catch and carry recording medium 17.

In addition, if the width Lc of the par of top Lb greater than described scope, then the top 13Hb of high projection 13H is difficult to embed recording medium 17, the suitable friction force when can not get carrying recording medium 17, its result can't catch and carry recording medium 17.Also have, if less than described scope, the top 13Lb of low projection 13L also can be embedded in recording medium 17, and the top 13Hb of the high projection 13H of result can thrust more deeply in recording medium 17, will stay the vestige of high projection 13H on the lettering face of recording medium 17.

Also have the height H h of described microspike 13, Lh, difference of height Δ h, angle H θ, L θ, drift angle H α, L α, the situation the when diameter that the par width Hc of top Hb, Lb, Lc equivalence are suitable for conveying cylinder is 4-30mm.

In addition, the configuration of a plurality of microspikes 13 that formed by high projection 13H and low projection 13L is one of them example in the present embodiment, also can set arbitrarily according to needs such as the method for conveying mechanism, design concepts.

For example, a plurality of microspikes 13 can be configured to the shape of rules such as reticulation, zig-zag, also can random arrangement.And then the configuration of high projection 13H and low projection 13L also can be adopted alternate configurations or random arrangement.In addition, conveying cylinder 11 is applied to carry repeatedly when sending the recording device of recording medium 17 with reverse pumping, the upright plane 13Ha that establishes of the height of high at least projection 13H can be set as the axially formation of the directed in opposite of adjacent two row.In addition, as described later in detail, low projection 13L is not embedded in recording medium 17 when carrying recording medium 17, be to be used to support recording medium 17, so configurable in any position.

The crimping cylinder 21 that can be crimped on described conveying cylinder 11 usually as shown in the figure, subtend is in the projection formation portion 14,14 that is formed on every a segment distance on the conveying cylinder 11, and set a plurality ofly every a segment distance, and all crimping cylinder 21 is crimped on the jut 14,14 of conveying cylinder 11 equably by recording medium 17.Also have,, can enumerate PA (polyamide), POM resins such as (polyformaldehyde) as the material of described crimping cylinder 21.

In addition, as described crimping cylinder 21, can use the metallic cylinder, and when using this metallic cylinder, the microspike 13 for fear of crimping cylinder 21 direct contacts in conveying cylinder 11 and the front end of blunt microspike 13, crimping cylinder 21 can be adapted to front end from the microspike 13 of conveying cylinder 11 and have interval, for example about 0.1-0.15mm less than recording medium 17 thickness.

Also have, crimping cylinder 21 can not be provided with a plurality of, and only establishes the crimping cylinder 21 that single length roughly is equivalent to conveying cylinder 11 length.

In addition, the surface of metallic cylinder body 12 can be used by metal platings such as electroless plating nickel and constituting of covering of the thick coating of about 2-6 μ m that forms.Formation method as the metal plating that forms this coating; can from the method on available resistant metal lining such as plating, plated by electroless plating, physical vapor deposition (vacuum evaporation, ion plating, cathodic sputtering), electroless plating (vapor deposition), hot dipping protection metallic cylinder body 12 surfaces, select according to needs such as design concepts.Certainly, being not limited to electroplate as the formation method of coating, also can be the method on available resistant metals lining protection metallic cylinder body 12 surfaces such as metal spraying, metal diffusion plating.

And then, when employing covers the structure on surface of conveying cylinder 11 with described coating, as described raw metal, can use general rolled structure steel (JIS G 3101), mechanical structural carbon steel (JIS G 4051), automatic steel low-cost raw materials such as (JIS G 4804).In addition, also can heat-treat this raw metal.

In addition, when employing is provided with the structure of coating on conveying cylinder 11 surfaces, can cover small metallic foreign body about the diameter 1-2 μ m that can't remove with back operation ultrasonic purification that is produced when metallic cylinder body 12 surface forms a plurality of microspike 13 with coating, therefore can prevent the damage that causes by metallic foreign body, be attached with on the record surface as recording medium 17 and when recording medium 17 comes off, cause the decrease in image quality that lacks parts of images and cause when metallic foreign body after writing down under the state of metallic foreign body, damage of the thermal head (thermalhead) that causes by metallic foreign body etc.Also have,,, be advisable with the 2-6 mu m range from can cover the angle of metallic foreign body really with coating as the thickness of coating.In addition, when coating being set by electroless plating nickel, the not only hard but also fine and close tunicle with good corrosion stability and resistance to abrasion that the uniform hardness of available thickness is approximately 400Hv covers the surface of the metallic cylinder body 12 that comprises a plurality of microspikes 13, can continue the function of a plurality of microspikes 13 of maintenance so for a long time.

Below one of the formation method of a plurality of microspikes 13 of conveying cylinder in the present embodiment 11 example is described.

The main portion shape that is used for the drift 26 of plastic working when simply having represented among Fig. 7 to make conveying cylinder 11.As shown in the figure, the two ends of drift 26 are made stopper portions 26a, and by after plastic working, make this stopper portions 26a touch the peripheral part of metallic cylinder body 12, guarantee the accuracy rate of size.In addition, in vertical both sides of drift 26, and be formed with the tooth portion 29 that is used to form microspike 13 respectively on two projection formation portion 14,14 corresponding positions.Therefore, the surface of metallic cylinder body 12 had been cut when drift 26 was contacted with metallic cylinder body 12, formed the half dome-type Ministry of worker that adds that is made of recess 27 that is eliminated and protuberance 28 (Fig. 3, Fig. 5), and this protuberance 28 is described microspike 13.

Be formed at being shaped as of tooth 29a in the tooth portion 29 of described drift 26, forming its front end with the corresponding position of the high projection formation 14H of portion in its raised face is sharp leg-of-mutton tooth 29aH, and form the tooth 29aL of the smooth echelon form of its front end with the corresponding position of the low projection formation 14L of portion, promptly sharp vertex of a triangle is removed the shape of back formation so that the poor of length to be set along the base level because the front end of high projection 13H forms, therefore form the difference of depth direction by the surface of having cut metallic cylinder body 12, formed two kinds of height H h that microspike 13 is high projection 13H and low projection 13L of while, difference of height Δ h is arranged between the Lh, and the shape of the top Hb of the high projection 13H of formation is that its front end is pointed vertically, and the top 13Lb of low projection 13L then is flat condition.

In addition, in the present embodiment, can form 2 projection formation portions 14 at an axial row microspike 13 in the plastic working.After finishing processing of these row, then with 12 rotations of metallic cylinder body decide angle, carry out the processing of next column.Carry out like this can obtaining having the conveying cylinder 11 of required microspike 22 after the circle processing.

Also have, conveying cylinder 11 is used for carrying repeatedly or reverse pumping when sending the recording device of recording medium 17, by clamping two drifts 26 of metallic cylinder body 12 and subtend configuration, make the direction of its tooth 29a opposite, staggered in the position of the tooth 29a in two drifts 26 simultaneously metallic cylinder body 12 axially, can process the microspike 13 of the throughput direction that points to recording medium 17 simultaneously and point to the reciprocal microspike 13 of the throughput direction of recording medium 17.

In addition,, also can be used in metallic cylinder body 12 outer peripheral faces and form high projection 13H, and remove the part top Hb of these high projection 13H, to form low projection 13L with lathes such as lathe, grinding machines as the formation method of microspike 13.In addition, also can apply electro-discharge machining, etch processing, form a plurality of microspikes 13 with high projection 13H and low projection 13L by surface to metallic cylinder body 12.With carry out with drift 26 comparing when plastic working forms, the long processing time of this job operation has increased cost.

Explanation has the effect of the present embodiment of described formation according to Fig. 8 and Fig. 9 below.

Fig. 8 and Fig. 9 represent to utilize the feed status of the recording medium of conveying cylinder of the present invention, and Fig. 8 is a lateral plan, and Fig. 9 is the amplification profile of Fig. 8.

With identical in the past, the conveying cylinder 11 of present embodiment is adapted to and can be rotated driving according to the propulsive effort of not shown CD-ROM drive motor as the feedway of conveying mechanism in the recording device.Therefore as shown in Figure 1, contact has the outer peripheral face that carries out the crimping cylinder 21 of driven rotation with conveying cylinder 11 in the projection formation portion 14 of conveying cylinder 11, as shown in Figure 8, drive conveying cylinder 11 by rotation, be held on recording medium 17 between conveying cylinder 11 and the crimping cylinder 21 and carry.

At this moment, as shown in Figure 9, front end owing to low projection 13L in a plurality of microspikes 13 of the conveying cylinder 11 of present embodiment is that top Lb is formed flatly, therefore the load that presses recording medium 17 by low projection 13L does not converge and comparatively disperses, its result, the front end of low projection 13L is the surface that top Lb is not embedded in recording medium 17, and is supporting recording medium 17.Therefore, be that pointed top Hb is embedded in recording medium 17 at the front end that has only high projection 13H, even the contact pressure of the cylinder of crimping simultaneously 21 is big, its embedded quantity is that difference of height Δ h keeps certain value by the difference of high projection 13H and low projection 13L each height H h, Lh also.

That is to say, conveying cylinder 11 according to present embodiment, when carrying recording medium 17, consider the decline of the contact pressure that variation is in time produced, by strengthening in advance, the embedded quantity that makes the front end of high projection 13H be embedded in recording medium 17 is not subjected to the influence of the inhomogeneous of contact pressure and recording medium kind to keep certain value always.

Therefore, a plurality of microspikes 13 according to the conveying cylinder 11 of present embodiment, can guarantee clamping recording medium 17 and the seizure when carrying, conveying property and delivery precision, and the high delivery precision for a long time that not influenced by the inhomogeneous of contact pressure and recording medium kind.

This fact can be by being combined as the conveying cylinder 11 of present embodiment the feedway of conveying mechanism in the recording device, be the paper feed roller of color thermal chopping machine specifically, and with common paper, ground paper, postcard, OHP with paper and the paper substrate surface coating resin arranged special with paper during as recording medium 17 record color images, the experimental result of the high delivery precision that the recording medium 17 of all kinds is shown is confirmed.

In addition, conveying cylinder of the present invention is not limited to paper feed roller, also can be used for the conveying of various recording mediums such as capstan roller, pinch wheel.

In addition, the present invention is not limited to described embodiment, can carry out various changes as required.

As mentioned above,, can obtain high delivery precision for a long time really, and not be subjected to the influence of kind of the inhomogeneous and recording medium of contact pressure, can produce very excellent effect according to conveying cylinder of the present invention.

Claims (5)

1. conveying cylinder, outer peripheral face at columned metallic cylinder body has a plurality of microspikes, this microspike is that this metallic cylinder body is carried out plastic working is formed, clamping recording medium and conveying between this cylinder body and the crimping cylinder, it is characterized in that: described a plurality of microspikes comprise two kinds of high microspike and low microspikes, the height of described high microspike is in the 0.03-0.1mm scope, the height of described low microspike is in the 0.01-0.08mm scope, and the top of described low microspike is smooth.

2. conveying cylinder according to claim 1 is characterized in that: the diameter of described conveying cylinder is 4-30mm, and the difference of height of described high microspike and described low microspike is in the 0.01-0.04mm scope.

3. conveying cylinder according to claim 2 is characterized in that: the par width at described low microspike top is, in throughput direction is the 0.07-0.15mm scope.

4. conveying cylinder according to claim 1 is characterized in that: the surface with described metallic cylinder body outer peripheral face of microspike is coated with coating by metal plating.

5. conveying cylinder according to claim 4 is characterized in that: the thickness of described coating is 2-6 μ m.

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