什(shen)么(me)是裹背條(tiao)，裹背條(tiao)是通(tong)過皮殼機等(deng)機械用(yong)于精裝書(shu)本(ben)的書(shu)脊(ji)(ji)部分，使書(shu)貼連接得更加牢固(gu)。書(shu)脊(ji)(ji)制作弧長的計(ji)算(suan)，本(ben)器(qi)規(gui)(gui)格依(yi)書(shu)芯幅面大小進行調定，以(yi)能(neng)將書(shu)芯平穩地送進夾(jia)書(shu)裝置內為標(biao)準。入本(ben)后的書(shu)冊不斜歪，四角垂直地頂齊在夾(jia)書(shu)裝置的靠板、側規(gui)(gui)內。裁切尺寸(cun)正確一致，其質量要求與規(gui)(gui)格誤差(cha)與一般切書(shu)相同。

 夾(jia)(jia)書(shu)簽(qian)絲(si)帶(dai)裝置安(an)放(fang)在切(qie)書(shu)機與扒圓起脊機之間(jian)。即(ji)將(jiang)切(qie)完的書(shu)芯(xin)，用分本器從中間(jian)分開，再由輸(shu)放(fang)絲(si)帶(dai)器將(jiang)絲(si)帶(dai)夾(jia)(jia)入中心紙書(shu)芯(xin)的中間(jian)靠訂縫(feng)一邊(bian)。絲(si)帶(dai)夾(jia)(jia)在書(shu)芯(xin)內(nei)兩端各(ge)留出粘邊(bian)和使用的余(yu)地，再經切(qie)刀（剪(jian)刀式(shi)）將(jiang)其剪(jian)斷。

剪(jian)斷后的(de)(de)絲(si)帶(dai)，裹(guo)背(bei)(bei)(bei)條芯(xin)部分(fen)(fen)被下(xia)面膠(jiao)輥(gun)著膠(jiao)、壓(ya)實完成(cheng)(cheng)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)帶(dai)過程。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)帶(dai)的(de)(de)長度(du)與一般(ban)手工加工長度(du)基本相同，可依書(shu)(shu)(shu)(shu)(shu)(shu)(shu)冊幅面長度(du)調(diao)定(ding)。扒(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)操作(zuo)及(ji)要(yao)求(qiu)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)經裁切、夾(jia)粘絲(si)帶(dai)（或(huo)不夾(jia)粘絲(si)帶(dai)）后，繼續傳送（或(huo)翻(fan)轉(zhuan)變位）并做90°翻(fan)轉(zhuan)，使平(ping)放書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)變為后背(bei)(bei)(bei)朝(chao)上（或(huo)朝(chao)下(xia)）而進入扒(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)。扒(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)的(de)(de)加工，其操作(zuo)分(fen)(fen)為兩步，但機(ji)器的(de)(de)結構是(shi)連(lian)在(zai)一起(qi)(qi)的(de)(de)，均是(shi)先(xian)扒(ba)圓(yuan)(yuan)(yuan)后起(qi)(qi)脊(ji)(ji)(ji)(ji)。扒(ba)圓(yuan)(yuan)(yuan)。扒(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)在(zai)扒(ba)圓(yuan)(yuan)(yuan)時(shi)，由一組（或(huo)一對(dui)）圓(yuan)(yuan)(yuan)輥(gun)，將(jiang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)壓(ya)緊后作(zuo)相對(dui)旋(xuan)轉(zhuan)動(dong)作(zuo)），使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)成(cheng)(cheng)適當規格(ge)圓(yuan)(yuan)(yuan)勢，加工成(cheng)(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)形狀分(fen)(fen)為圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有脊(ji)(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)和方(fang)背(bei)(bei)(bei)（或(huo)稱(cheng)平(ping)背(bei)(bei)(bei)）三種(zhong)。平(ping)裝(zhuang)裹(guo)背(bei)(bei)(bei)條書(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)不高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)平(ping)面，而精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)一般(ban)要(yao)高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)平(ping)面。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)分(fen)(fen)為真脊(ji)(ji)(ji)(ji)和假脊(ji)(ji)(ji)(ji)。

真脊是利用書(shu)(shu)背(bei)(bei)上下(xia)兩邊變形(xing)的(de)弧度高(gao)出(chu)書(shu)(shu)芯平(ping)面；假脊則(ze)是利用紙(zhi)(zhi)板(ban)鑲在書(shu)(shu)背(bei)(bei)后形(xing)成的(de)書(shu)(shu)脊，書(shu)(shu)脊的(de)脊高(gao)等于封面紙(zhi)(zhi)板(ban)的(de)厚度。方背(bei)(bei)書(shu)(shu)芯。是指書(shu)(shu)芯的(de)書(shu)(shu)背(bei)(bei)平(ping)直方正。書(shu)(shu)背(bei)(bei)不(bu)突出(chu)，與平(ping)裝書(shu)(shu)刊的(de)書(shu)(shu)背(bei)(bei)基(ji)本相似。

背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)上(shang)下(xia)環(huan)襯互(hu)成(cheng)(cheng)直角，由于精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)是用(yong)(yong)(yong)鎖線訂訂連，每一(yi)(yi)(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)訂口折縫(feng)里面都用(yong)(yong)(yong)線串過，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部(bu)分要厚(hou)一(yi)(yi)(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)帖(tie)數(shu)越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)其它部(bu)分厚(hou)度(du)的(de)差(cha)別也越大(da)。所以方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)形(xing)(xing)式(shi)一(yi)(yi)(yi)般只用(yong)(yong)(yong)于厚(hou)度(du)約為(wei)20mm的(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)又稱圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高起有(you)(you)脊(ji)(ji)(ji)壟(long)，堅硬挺實，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)形(xing)(xing)式(shi)適(shi)合(he)于裝(zhuang)訂較厚(hou)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝(zhuang)上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)(you)明(ming)顯的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方(fang)便。目(mu)前我(wo)國的(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多采用(yong)(yong)(yong)這(zhe)種(zhong)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)的(de)加(jia)工(gong)形(xing)(xing)式(shi)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)又稱圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)假(jia)脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)厚(hou)度(du)相同，堅實挺括，但沒有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)。這(zhe)種(zhong)形(xing)(xing)式(shi)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)，一(yi)(yi)(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或(huo)塑(su)料(liao)壓制而成(cheng)(cheng)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相配套。中心紙有(you)(you)些機器(qi)還沒有(you)(you)沖圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)置，即(ji)將方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)(xian)進行沖圓(yuan)(yuan)(yuan)(yuan)加(jia)工(gong)，作初(chu)步定型。先(xian)(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)厚(hou)度(du)和中心紙幅面大(da)小調定好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及扒圓(yuan)(yuan)(yuan)(yuan)輥(gun)(gun)（或(huo)沖圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)置）的(de)規(gui)矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內并送到扒圓(yuan)(yuan)(yuan)(yuan)輥(gun)(gun)之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒擠成(cheng)(cheng)一(yi)(yi)(yi)定圓(yuan)(yuan)(yuan)(yuan)勢。