Printer head biasing apparatus

In a chart recorder where a print head is used to record data on a moving strip of chart paper, said chart recorder including a support frame and means for supporting the moving chart paper, said moving chart paper supporting means being spaced apart from said print head to accommodate the moving chart paper therebetween, the improvement comprising:

• a cantilevered leaf spring having a fixed end and a free end, said fixed end anchored by a retainer means to said support frame;
• said print head mounted on the free end of said leaf spring adjacent said paper supporting means;
• said leaf spring for biasing the print head for maintaining constant pressure between the print head and the moving chart paper;
• said retainer means including means to adjust the pressure between said print head and the moving chart paper.

In a chart recorder where a print head is used to record data on a moving strip of chart paper, said chart recorder including a support frame and means for supporting the moving chart paper, said moving chart paper supporting means being spaced apart from said print head to accommodate the moving chart paper therebetween, the improvement comprising:

• a cantilevered leaf spring having a fixed end and a free end, said fixed end anchored by a retainer means to said support frame;
• said print head mounted on the free end of said leaf spring adjacent said paper supporting means;
• said leaf spring for biasing the print head for maintaining constant pressure between the print head and the moving chart paper;
• said retainer means including biasing means to adjustably engage the leaf spring to thereby adjust pressure between said print head and the moving chart paper.

In a chart recorder where a print head is used to record data on a moving strip of chart paper, said chart recorder including a support frame and means for supporting the moving chart paper, said moving chart paper supporting means being spaced apart from said print head to accommodate the moving chart paper therebetween, the improvement comprising:

• a cantilevered leaf spring having a fixed end and a free end, said fixed end anchored by a retainer means to said support frame;
• said print head mounted on the free end of said leaf spring adjacent said paper supporting means;
• said leaf spring for biasing the print head for maintaining constant pressure between the print head and the moving chart paper;
• said retainer means including a shim in contact with said leaf spring for flexing said leaf spring to adjust the pressure between said print head and the moving chart paper.