The cutter elements of the shredder mechanism
One aspect of the invention provides plastic shredders for shredding data bearing substrates, the shredder having a housing and a shredder mechanism received in the housing including an electrically powered motor and a plurality of cutter elements. The shredder mechanism enables one or more data bearing substrates to be fed into the cutter elements, and the motor is operable to drive the cutter elements so that the cutter elements shred the one or more data bearing substrates. The housing has an opening enabling the one or more data bearing substrates to be fed therethrough into the cutter elements of the shredder mechanism. The shredder mechanism further comprises a first shaft and a second shaft that rotate relative to each other, and the first and second shafts are coupled to the motor to enable the motor to rotate the shafts. The cutter elements are positioned along the first and second shafts such that the cutter element on each shaft are received in an interleaving relationship with the cutter elements of the other shaft.
One or more of the cutter elements each include a pair of outer blades and a inner support positioned between the outer blades. In each of the cutting elements, the outer blades include at least a pair of integral cross-cut tooth portions aligned circumferentially with the one another, and the inner plastic support includes an integral tooth support portion aligned circumferentially with and positioned between each pair of cross-cut tooth portions and to support the cross-cut tooth portions.
To Lubricate plastic shredder Blades：
A shredder is an electrical appliance used in an office or home to destroy documents containing sensitive and personal information. Since your privacy is surrendered once any of these documents are found in the trash, a shredder can be an important step in preventing identity scams and maintaining your privacy. Most shredders have a rotating cylindrical cutting blade that, depending on the model, will shred paper, staples, credit cards and compact discs. The cutting blades will need regular lubrication to keep your shredder working smoothly.
The outer blades may be formed from steel and the inner support formed from molded plastic. The outer blades may be formed using a stamping or punching process. Preferably, but not necessarily, the outer blades and inner support are snap-fit together.
1.Use a plastic squeeze bottle with a long nozzle and apply lubricating oil to the cutting blades over their entire length through the paper input opening.
2.Turn the plastic shredders on for approximately two seconds to rotate the cutting blades to distribute the oil evenly .
3.Switch the direction of the cutting blades (as in a paper-jam situation) for approximately three seconds.
Repeat the forward/reverse blade rotation three more times to make sure the lubricating oil is spread completely over the cutting blade.
Another aspect of the invention provides a method of forming a cutter element for shredding data bearing substrates, in which a plurality of cutter elements are positioned along a rotatable shaft to shred substrates that are inserted in an opening in a housing of a plastic shredders manufacturer , wherein the cutter elements are a part of a shredder mechanism that is activated by a motor in the housing, and the motor rotates the shaft to rotate the plurality of cutter elements. The method comprises: forming a pair of outer blades including at least a pair of integral cross-cut tooth portions; forming an inner support including an integral tooth support portion; positioning the inner plastic support between the pair of outer blades; aligning circumferentially the cross-cut tooth portions of said outer blades with the cross-cut tooth portion of the inner plastic support; and connecting the pair of outer blades to the inner support to form and support a cross-cut tooth portion on the cutter element.
The forming of the pair of outer blades may comprise stamping. The forming of the inner support may comprise molding. Preferably, but not necessarily, the method of connecting the pair of outer blades and inner support is through a snap-fit connection.
Other objects, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.
source:townhall|plastic shredders
